My GeoServer WFSThis is a description of your Web Feature Server. The GeoServer is a full transactional Web Feature Server, you may wish to limit GeoServer to a Basic service level to prevent modificaiton of your geographic data.WFS, WMS, GEOSERVERhttp://geoserver.sourceforge.net/html/index.phpNONENONEtwap_public:twap_sids_legal_qlt_poltpaysdescriptionLegal/Institutional, Groundwater protectionEPSG:4326tbamap2015:tbamap_2009ggisdescriptionTransboundary AquiferEPSG:4326tbamap2015:tbamap_2012ggisdescriptionTransboundary AquiferEPSG:4326tbamap2015:tbamap_2014ggisdescriptionTransboundary AquiferEPSG:4326tbamap2015:tbamap_2015ggisThis map is about Transboundary Aquifers (TBAs) of the world. It shows the state of information presently (2015) available on the occurrence and extent of TBAs world-wide. The map provides a global overview of these important shared water resources and intends to encourage further research and assessment thereof. For more information visit www.un-igrac.orgTransboundary AquiferEPSG:4326geonode:tba_map_2025The map Transboundary Aquifers of the World provides an overview of aquifers that cross international borders. Developed over more than 15 years, the map synthesizes findings from regional and aquifer-specific studies to reflect the most up-to-date knowledge. Each new edition incorporates scientific advances and improved data access. This edition (2025) is based on a review of approximately 150 references, including peer-reviewed scientific publications as well as grey literature. Additional data were obtained from regional centres, institutions and individual experts. All references are cited in the online attribute table. For the first time, this edition includes basic descriptive information for each TBA, where available, such as the type of aquifer and main lithology. This information is also accessible in the attribute table.   Preferred citation: IGRAC and UNESCO-IHP (2025) Transboundary Aquifers of the World. Edition 2025. Delft, Netherlandstba_map_2025, Transboundary Aquifers, featuresEPSG:4326twap.gwshare:twap_ind_sids_mannualgwrechargedepthIndicator 1.1 - SIDS. Long-term average groundwater recharge (including man-made components like return-flows, induced recharge and artificial recharge) [m3/yr], divided by the surface area of the island [m2]. Unit: [mm/yr] or [litre/m2/yr]. S: SIDS indicator.Groundwater rechargeEPSG:4326twap.gwshare:twap_ind_sids_mannualrenewablegwpercapIndicator 1.2 - SIDS. Groundwater recharge (including man-made components like return-flows, induced recharge and artificial recharge) [m3/yr], divided by the number of inhabitants on top of the aquifer [capita]. SI: SIDS indicator.Groundwater rechargeEPSG:4326twap.gwshare:twap_ind_sids_natbackgwqualityIndicator 1.3 - SIDS. Percentage of surface area of the aquifer where the natural groundwater quality satisfies local drinking water standards (i.e. percentage of aquifer area which is not affected by natural salinity, arsenic, fluoride, etc.). S: SIDS indicator.Groundwater QualityEPSG:4326twap.gwshare:twap_ind_sids_humandepgwIndicator 2.1 - SIDS. Volume of groundwater used [m3/yr] expressed as a percentage of total volume of water used [m3/yr]. S: SIDS indicator.Groundwater abstractionEPSG:4326twap.gwshare:twap_ind_sids_gwdepletion2Indicator 3.1 - SIDS. Observed rate of long-term progressive decrease of groundwater storage (accompanied by steadily declining groundwater levels), expressed as an equivalent depth of water averaged over the island area. Preferred period: 2000-2010. S: SIDS indicator.Groundwater depletionEPSG:4326twap.gwshare:twap_ind_sids_gwpollutionIndicator 3.2 - SIDS. Observed areal extent of polluted zones as a percentage of total aquifer area. S: SIDS indicator.Groundwater pollutionEPSG:4326twap.gwshare:twap_ind_sids_saltwaterintrusionIndicator 3.3 - SIDS. Observed zones of saltwater intrusion as a percent­age of total island area (due to salinity exceeding drinking water quality standards). S: SIDS indicator.Saltwater intrusionEPSG:4326twap.gwshare:twap_ind_sids_popdensityIndicator 4.1 - SIDS. Number of inhabitants of the island [capita] divided by surface area of the island [km2]. S: SIDS indicator.PopulationEPSG:4326twap.gwshare:twap_ind_sids_gwdevelopmentstressIndicator 4.2 - SIDS. Total annual groundwater abstraction [m3/yr] divided by groundwater recharge [m3/yr]. S: SIDS indicator.groundwater stressEPSG:4326twap.gwshare:twap_ind_sids_transblegalframeworkIndicator 5.1 - SIDS. Existence, status and comprehensiveness of groundwater legislation. S: SIDS indicator.Legal/InstitutionalEPSG:4326twap.gwshare:twap_ind_sids_transbinstframeworkIndicator 5.2 - SIDS. Existence, mandate and capabilities of institutions or institutional arrangements for managing SIDS groundwater. S: SIDS indicator.Legal/InstitutionalEPSG:4326sdc_af5_protected:spr_physiography_elevationShuttle Radar Topography Mission (SRTM)<br> <br>Source: NASA, 2014<br />keywordsEPSG:4326sdc_af5_protected:spr_physiography_riverdescriptionkeywordsEPSG:4326diktas:DK_Boundary_AdmBoundAlbaniaAdministrative boundaryEPSG:4326diktas:DK_Boundary_AdmBoundBandHAdministrative boundaryEPSG:4326diktas:DK_Boundary_AdmBoundCroatiaAdministrative boundaryEPSG:4326diktas:DK_Boundary_AdmBoundMontenegroAdministrative boundaryEPSG:4326diktas:DK_Boundary_AdmBoundDIKTASAdministrative boundaryEPSG:4326geonode:Africa_recharge_sitesGroundwater rechargeEPSG:4326igrac:gwquality_arsenicIGRAC (2004). Arsenic in Groundwater: Probability of occurrence of excessive concentration on global scale.Groundwater pollutionEPSG:4326twap_public:twap_sids_socioeconomic_artificialrechargedescriptionManaged Aquifer Recharge (MAR)EPSG:4326mar_global:marpotential_south_africaPotential artificial recharge areas have been mapped on a national scale by identifying aquifers that could receive recharge water based on an indicator of aquifer permeability. These include the following: 1) Primary aquifers. Primarily alluvium, coastal aquifers and localised riverbed alluvium, also referred to as Sandy Aquifers. The zones identified as intergranular with borehole yields more than 0.5 l/s on the 1:500 000 hydrogeological maps have been used for this purpose. artificial recharge by means of surface infiltration may be appropriate in such areas. 2) Fractured and weathered aquifers with high borehole yields. Hard rock aquifers with yields of more that 2 l/s have been identified from the 1:500 000 hydrogeological maps. The identified areas have been combined with processed borehole yields from the National Groundwater Data Base (NGDB). Two criteria were applied to the borehole yields from the NGDB: those with borehole yields more than 5 l/s and those with yields of more than 10 l/s. A 1 km² grid with borehole yields recorded in the NGDB has been used to identify the areas of highest borehole yield. The data from the NGDB have been superimposed on the selected Fractured and Weathered sections from the 1:500 000 hydrogeological maps to identify the prime artificial recharge areas. Artificial recharge by means of borehole injection may be appropriate in such areas.MAR suitability mappingEPSG:4326groundwater:Ascott_et_al_(2020)_In_situ_observations_and_lumped_parameter_model_reconstructions_reveal_intra-annual_to_multidecadal_variability_in_groundwater_levels_in_sub-Saharan_AfricaAscott, M. J., Macdonald, D. M. J., Black, E., Verhoef, A., Nakohoun, P., Tirogo, J., et al. (2020). In situ observations and lumped parameter model reconstructions reveal intra‐annual to multidecadal variability in groundwater levels in sub‐Saharan Africa. Water Resources Research, 56, e2020WR028056. https://doi.org/10.1029/2020WR028056   Understanding temporal variability in groundwater levels is essential for water resources management. In sub‐Saharan Africa, groundwater level dynamics are poorly constrained due to limited long‐term observations. Here, we present the first published analysis of temporal variability in groundwater levels at the national scale in sub‐Saharan Africa, using 12 multidecadal (ca. 1980s to present) groundwater level hydrographs in Burkina Faso. For each hydrograph, we developed lumped parameter models which achieved acceptable calibrations (NSE = 0.5–0.99). For eight sites not showing significant (p < 0.001) long‐term groundwater level declines, we reconstructed groundwater levels to 1902, over 50 years before the earliest observations in the tropics. We standardized and clustered the eight reconstructed hydrographs to compare responses across the sites. Overall, the 12 hydrographs were categorized into three groups, which are dominated by (1) long‐term declines (four sites), (2) short‐term intra‐annual variability (three sites), and (3) long‐term multidecadal variability (five sites). We postulate that group 1 is controlled by anthropogenic influences (land use change and abstraction). Correlation of modeled water table depth and groundwater response times with hydrograph autocorrelation suggests that hydrogeological properties and structure control differences between groups 2 and 3. Group 3 shows a small recovery in groundwater levels following the 1970/1980s drought. Differences in intra‐annual to multidecadal variability in groundwater levels have implications for water management and highlight the value of long‐term monitoring. Reconstructions contextualize current groundwater status, forecasts, and projections. The approach developed is generic and applicable where long‐term groundwater level data exist.Monitoring, WellEPSG:4326groundwater:Austria_-_Federal_Ministry_of_Agriculture__Forestry__Regions_and_Water_ManagementGroundwater levels from Austria were obtained via eHYD (https://ehyd.gv.at/), a service of the Federal Ministry of Agriculture, Forestry, Regions and Water Management of the Republic of Austria.   Neither the Ministry nor eHYD is involved in any of the derivative work and does not necessarily endorse the GGMN or its objectives.   The data is shared in the GGMN under the CC BY 4.0 licence.Monitoring, WellEPSG:4326twap_public:twap_sids_hydrogeological_avgannrechargemmyrdescriptionkeywordsEPSG:4326groundwater:Basilio_Hazas_et_al_(2024)_Indicators_for_the_Assessment_of_the_Impact_of_Hydropeaking_on_AquifersBasilio Hazas, M., Marcolini, G., Wohlmuth, B., & Chiogna, G. (2024). Indicators for the assessment of the impact of hydropeaking on aquifers. Geophysical Research Letters, 51, e2023GL107611. https://doi.org/10.1029/2023GL107611    The operation of hydropower plants leads to sudden changes in river stage and to a flow regime known as hydropeaking. Hydropeaking alters the morphology of the riverbed and water quality, and ultimately poses a risk to riverine ecosystems. While many indicators are available to quantitatively assess this problem in rivers, the impact of hydropeaking on aquifers is largely unknown and lacks of quantitative indicators. We analyze with wavelet techniques the spatial and temporal dynamics of surface water-groundwater interaction in an aquifer impacted by two differently regulated rivers. We propose four indicators to study the aquifer stress produced by hydropeaking and classify the observed groundwater head time series into weakly, moderately and highly impacted. This study opens the possibility for a quantitative assessment of the impact of hydropeaking on the groundwater ecosystem.  Groundwater monitoringEPSG:4326twap_public:twap_sids_socioeconomic_anabstractionblueagridescriptionkeywordsEPSG:4326twap_public:twap_sids_socioeconomic_anabstractionbluedomdescriptionGroundwater abstraction, Domestic useEPSG:4326twap_public:twap_sids_socioeconomic_anabstractionblueinddescriptionIndustry, Groundwater abstractionEPSG:4326diktas:DK_Boundary_dinaric_karstStudy areaEPSG:4258groundwater:Carrière_et_al_(2021)_Long-term_groundwater_resource_observatory_for_Southwestern_MadagascarCarrière SD, Health T, Rakotomandrindra PFM, et al. Long-term groundwater resource observatory for Southwestern Madagascar. Hydrological Processes. 2021; 35:e14108. https://doi.org/10.1002/hyp.14108   Madagascar has one of the highest poverty rates in the world and consequently the long-term monitoring of groundwater resources is not a priority for the authorities. However, groundwater is often the only sustainable resource that has a satisfactory quality to supply the population. This is especially true in the south-west of the country, which is a semi-arid region and a global change hot spot (intense land use and climate changes). In response to the lack of data, the Groundwater Resource Observatory for Southwestern Madagascar (GROSoM) was established to monitor piezometry and meteorology over the longer term as part of a humanitarian response. The first site was setup in 2014 in a catchment located over a carbonate plateau; in 2018, a second site was installed in an alluvial setting within a crystalline basement catchment and a third site will be installed in 2020 to monitor groundwater dynamics in a coastal setting. The three sites, located between Toliara and Taolagnaro cities, are complementary and representative of various hydrogeological systems in Southwestern Madagascar. Each site includes a weather station and between 3 and 6 piezometric probes. The monitoring data indicate a strong inter-annual variability in precipitation, which induces a strong variability in aquifers recharge. One of the driest years in 2016 seems to be consistent with strong El Niño – Southern Oscillation (ENSO) effects observed at the global scale, while years with higher recharge appear to be related to cyclones such as Fundi in 2015 and Eketsang in 2019. Preliminary results of cross-disciplinary studies demonstrated a link between groundwater and health issues (i.e., admissions to basic health centres). This observatory aims to produce long-term data and has two objectives: (i) strengthening the early warning system for humanitarian crises in Madagascar; (ii) contributing to a better understanding of the effects of climate change on groundwater resources in this semi-arid region.Groundwater monitoringEPSG:4326diktas:DK_HYG_KarstCavesCave, KarstEPSG:4326diktas:DK_CLC_ClimateStationsClimateEPSG:4326igrac:other_climate_2007_koppen_geigerGlobal climate map using the Koppen-Geiger system based on a large global data set of long-term monthly precipitation and temperature station time series. Citation: Peel, M. C., Finlayson, B. L., and McMahon, T. A.: Updated world map of the Köppen-Geiger climate classification, Hydrol. Earth Syst. Sci., 11, 1633-1644, doi:10.5194/hess-11-1633-2007, 2007.ClimateEPSG:4326twap_public:twap_climate_zonesdescriptionkeywordsEPSG:4326igrac:go_countryborders_faogaul2014source: FAO GAUL 2014Administrative boundaryEPSG:4326geonode:DITCHES1features, DITCHESEPSG:2180twap_public:twap_sids_hydrogeological_degconfinementdescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_depthtosaltwaterdescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_disttogwleveldescriptionkeywordsEPSG:4326diktas:DK_Boundary_DIKTASprojectStudy areaEPSG:4258diktas:DK_OTH_EmeraldAreasThe Emerald network is a network of nature protection areas to conserve wild flora and fauna and their natural habitats of Europe.Protected areaEPSG:4326twap_public:twap_sids_environmental_exptchangeaet50yearsdescriptionkeywordsEPSG:4326twap_public:twap_sids_environmental_exptchangeprecip50yearsdescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_arealrechargedescriptionkeywordsEPSG:4326twap_public:twap_sids_legal_qnt_finesdescriptionLegal/InstitutionalEPSG:4326twap_public:twap_sids_hydrogeological_freshwatervertthicknessdescriptionkeywordsEPSG:4326twap_public:twap_ind_ca_humandepgwagricultIndicator 2.3 - Global Inventory<br> <br>Volume of groundwater for agricultural use [m3/yr] expressed as a percentage of total agricultural water use [m3/yr].<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_indicatorintensityNumber of indicators available at aquifer level (Max.=20).<br> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_mannualgwrechargedepthIndicator 1.1- Global Inventory<br> <br>Long term average groundwater recharge in [m3/yr] divided by the surface area [m2] of the complete aquifer (i.e. not only the surface area of the recharge area). Unit: [mm/yr] or [litre/m2/yr]<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_mannualrenewablegwpercapIndicator 1.2 - Global Inventory<br> <br>Groundwater recharge [m3/yr] divided by the number of inhabitants [capita] on top of the aquifer. Reference year for population: 2010.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_natbackgwqualityIndicator 1.3 - Global Inventory<br> <br>Percentage of surface area of the aquifer where the natural groundwater quality satisfies local drinking water standards (i.e. percentage of aquifer area which is not affected by natural salinity, arsenic, fluoride, etc.).<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_aqbuffcapacityIndicator 1.4 - Global Inventory<br> <br>Volume of groundwater stored in the aquifer [m3] divided by groundwater recharge [m3/yr]. <br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_aqvulnerabilityclimchangeIndicator 1.5 Global Inventory.<br> <br>Expected groundwater budget regime change in response to changes in climatic conditions. Indicator takes into account the degree of confinement, aquifer lithology, recharge and depth to groundwater table (see TWAP Groundwater methodology report for details).<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_aqvulnerabilitypollutionIndicator 1.6 - Global Inventory<br> <br>Percentage of surface area of the country segment where the aquifer is considered moderately to highly vulnerable to pollution. Indicator takes into account the degree of confinement, aquifer lithology and depth to groundwater table (see TWAP Groundwater methodology report for details).<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_humandepgwIndicator 2.1 - Global Inventory<br> <br>Volume of groundwater used [m3/yr] expressed as a percentage of total volume of water used [m3/yr].<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_humandepgwdomesticIndicator 2.2 - Global Inventory<br> <br>Volume of groundwater for domestic use [m3/yr] expressed as a percentage of total domestic water use [m3/yr].<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_humandepgwindustryIndicator 2.4 - Global Inventory<br> <br>Volume of groundwater for industrial use [m3/yr] expressed as a percentage of total industrial water use m3/yr].<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_ecosystdepgwIndicator 2.5 - Global Inventory<br> <br>Percentage of surface area of the aquifer where the phreatic water level is less than 5 m below the surface, or percentage of surface area of the aquifer covered by groundwater dependent ecosystems.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_prevelancespringsIndicator 2.6 - Global Inventory<br> <br>Average annual groundwater discharge by springs [m3/yr] divided by Groundwater recharge [m3/yr]. (Springs are very sensitive to changes in groundwater budget, either from change in recharge or change in abstraction regime. Therefore spring discharge is a meaningful indicator of change.)<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_gwdepletionmmyrIndicator 3.1 - Global Inventory<br> <br>Observed rate of long-term progressive decrease of groundwater storage (accompanied by steadily declining groundwater levels), expressed as an equivalent depth of water averaged over the aquifer area. Preferred period: 2000-2010.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_gwpollutionIndicator 3.2 - Global Inventory<br> <br>Observed areal extent of polluted zones as a percentage of total aquifer area.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_popdensityIndicator 4.1 - Global Inventory<br> <br>Number of inhabitants [capita] on top of the aquifer divided by the surface area of the aquifer [km2]. Reference year for population: 2010.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_gwdevelopmentstressIndicator 4.2 - Global Inventory<br> <br>Total annual groundwater abstraction [m3/yr] divided by groundwater recharge [m3/yr].<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_transblegalframeworkIndicator 5.1 - Global Inventory<br> <br>Existence, status and comprehensiveness of binding agreement on the transboundary aquifer under consideration.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_transbinstframeworkIndicator 5.2 - Global Inventory<br> <br>Existence, mandate and capabilities of institutions or institutional arrangements for managing the transboundary aquifer under consideration.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_controlgwabstrIndicator 6.1 - Global Inventory<br> <br>Current practices on the implementation of measures to control groundwater abstraction.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_ca_gwqualityprotectionIndicator 6.2 - Global Inventory<br> <br>Current practices on the implementation of groundwater quality protection.<br /> <br>GA: Global inventory indicator at Aquifer level.<br />keywordsEPSG:4326omvs_public:GB_Maestrichtien_isopaquesMaestrichtianEPSG:4326omvs_public:GB_Miocene_moyen_limite_orientale_faciesMiddle MioceneEPSG:4326omvs_public:GB_Oligocene-Miocene_cote_toitOligocene-MioceneEPSG:4326omvs_public:GB_Oligocene-Miocene_isopaquesOligocene-MioceneEPSG:4326omvs_public:GB_Oligocene-Miocene_limite_faciesOligocene-MioceneEPSG:4326omvs_public:GB_socle_cote_toitCrystalline basementEPSG:4326twap_public:twap_ind_ns_indicatorintensityNumber of indicators available (Max.=20).<br /> <br>GC: Global inventory Indicator at Country segment level.keywordsEPSG:4326twap_public:twap_ind_ns_mannualgwrechargedepthIndicator 1.1 - Global Inventory. <br> <br>Long term average groundwater recharge [m3/yr] divided by the surface area [m2] of the complete country segment of the aquifer (i.e. not only the surface area of the recharge area). <br /> <br>GC: Global inventory indicator at Country segment level.<br />Groundwater rechargeEPSG:4326twap_public:twap_ind_ns_mannualrenewablegwpercapIndicator 1.2 - Global Inventory<br> <br>Groundwater recharge [m3/yr] divided by the number of inhabitants [capita] on top of the country segment of the aquifer. Reference year for population: 2010.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_natbackgwqualityIndicator 1.3 - Global Inventory<br> <br>Percentage of surface area of the country segment where the natural groundwater quality satisfies local drinking water standards (i.e. percentage of country segment area which is not affected by natural salinity, arsenic, fluoride, etc.).<br /> <br>GC: Global inventory indicator at Country segment level.<br />Groundwater QualityEPSG:4326twap_public:twap_ind_ns_aqbuffcapacityIndicator 1.4 - Global Inventory<br /> <br>Volume of groundwater stored in the aquifer [m3] divided by groundwater recharge [m3/yr].<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_aqvulnerabilityclimchangeIndicator 1.5 - Global Inventory <br></br> Expected groundwater budget regime change in response to changes in climatic conditions. Indicator takes into account the degree of confinement, aquifer lithology, recharge and depth to groundwater table (see TWAP Groundwater methodology report for details). <br></br> GC: Global inventory indicator at Country segment level.keywordsEPSG:4326twap_public:twap_ind_ns_aqvulnerabilitypollutionIndicator 1.6 - Global Inventory<br> <br>Percentage of surface area of the country segment where the aquifer is considered moderately to highly vulnerable to pollution. Indicator takes into account the degree of confinement, aquifer lithology and depth to groundwater table (see TWAP Groundwater methodology report for details).<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_humandepgwIndicator 2.1 - Global Inventory. <br> <br>Volume of groundwater used [m3/yr] expressed as a percentage of total volume of water used [m3/yr].<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_humandepgwdomesticIndicator 2.2 - Global Inventory<br> <br>Volume of groundwater for domestic use [m3/yr] expressed as a percentage of total domestic water use [m3/yr].<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_humandepgwagricultIndicator 2.3 - Global Inventory<br> <br>Volume of groundwater for agricultural use [m3/yr] expressed as a percentage of total agricultural water use [m3/yr].<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_humandepgwindustryIndicator 2.4 - Global Inventory<br> <br>Volume of groundwater for industrial use [m3/yr] expressed as a percentage of total industrial water use m3/yr].<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_ecosystdepgwIndicator 2.5 - Global Inventory<br> <br>Percentage of surface area of the aquifer where the phreatic water level is less than 5 m below the surface, or percentage of surface area of the aquifer covered by groundwater dependent ecosystems.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_prevelancespringsIndicator 2.6 - Global Inventory<br> <br>Average annual groundwater discharge by springs [m3/yr] divided by Groundwater recharge [m3/yr]. (Springs are very sensitive to changes in groundwater budget, either from change in recharge or change in abstraction regime. Therefore spring discharge is a meaningful indicator of change.)<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_gwdepletionIndicator 3.1 - Global Inventory<br> <br>Observed rate of long-term progressive decrease of groundwater storage (accompanied by steadily declining groundwater levels), expressed as an equivalent depth of water averaged over the aquifer area. Preferred period: 2000-2010.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_gwpollutionIndicator 3.2 - Global Inventory<br> <br>Observed areal extent of polluted zones as a percentage of total aquifer area.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_popdensityIndicator 4.1 - Global Inventory<br> <br>Number of inhabitants [capita] on top of the country segment of the aquifer divided by the surface area of the country segment [km2]. Reference year for population: 2010.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_gwdevelopmentstressIndicator 4.2 - Global Inventory<br> <br>Total annual groundwater abstraction [m3/yr] divided by groundwater recharge [m3/yr].<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_transblegalframeworkIndicator 5.1 - Global Inventory<br> <br>Existence, status and comprehensiveness of binding agreement on the transboundary aquifer under consideration.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_transbinstframeworkIndicator 5.2 - Global Inventory<br> <br>Existence, mandate and capabilities of institutions or institutional arrangements for managing the transboundary aquifer under consideration.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_controlgwabstrIndicator 6.1 - Global Inventory<br> <br>Current practices on the implementation of measures to control groundwater abstraction.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_ns_gwqualityprotectionIndicator 6.2 - Global Inventory<br> <br>Current practices on the implementation of groundwater quality protection.<br /> <br>GC: Global inventory indicator at Country segment level.<br />keywordsEPSG:4326groundwater:GGMN_Levels_DataWell and Monitoring data LayerMonitoring, WellEPSG:4326groundwater:GGMN_Quality_DataThis layer displays GGMN monitoring stations that report groundwater quality data. Some of these stations also include groundwater level measurements, while others provide only quality-related parameters.   Please click on each well or explore the general attribute table to see the available data.Monitoring, WellEPSG:4326groundwater:GGMN_SpringsThis layer displays GGMN monitoring points classified as springs.   Please click on each point or explore the general attribute table to see the available data.Monitoring, WellEPSG:4326groundwater:GGMN_With_FlagThis layer shows GGMN monitoring stations where a data quality control flag has been raised. A flag may be applied for one or more of the following reasons:   - A sudden change of +50 or -50 m - A gap in the data longer than 3 years - Unusual values such as exactly 0 or -9999   Click on a well and then select "View full record" for more information.Monitoring, WellEPSG:4326igrac:twap_legalaspects_qlt_poltpaysParameter 9.4.11 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_aquiferdata_aquifertypeParameter 5.2.1 - Global Inventory - Hydrogeological<br> <br>Aquifer type (single layer aquifer / aquifer system). <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />Aquifer typeEPSG:4326twap_public:twap_ns_amountofdataPercentage of parameters available for each country segments. <br> <br>GP: Global Inventory Parameter provided by national experts. <br />keywordsEPSG:4326igrac:twap_aquiferdata_degconfinementParameter 5.4.1 - Global Inventory – Hydrogeological<br> <br>Predominant hydraulic conditions across the aquifer / degree of confinement. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />ConfinementEPSG:4326igrac:twap_aquiferdata_depthtotopParameter 5.3.2 - Global Inventory – Hydrogeological<br> <br>Depth to top of aquifer formation. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />Aquifer depthEPSG:4326igrac:twap_aquiferdata_disttogwlevelParameter 5.3.1 - Global Inventory – Hydrogeological<br> <br>Distance from ground surface to groundwater table or piezometric level. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />Groundwater depthEPSG:4326igrac:twap_hydrogeological_totanndischargeParameter 6.9.1 - Global Inventory – Hydrogeological<br> <br>Total volumetric flow per year of all springs originating from the aquifer (springs are very sensitive to changes in groundwater budget, either as a result of changes in recharge or changes in abstraction regime. Therefore spring discharge is a meaningful indicator of change). <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_hydrogeological_arealrechargeParameter 6.1.4 - Global Inventory – Hydrogeological<br> <br>Areal extend of area where recharge takes place. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_legalaspects_qnt_finesParameter 9.3.6 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_socioeconomic_annbluewabstrParameter 8.3.1 - Global Inventory - Socio-economic<br> <br>Total annual volume of fresh water abstraction. This is the sum of surface water and groundwater use. Reference year 2010. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />features, view_twap_socioeconomicEPSG:4326igrac:twap_socioeconomic_annual_bluewabstr_domesticParameter 8.4.1.1 - Global Inventory - Socio-economic<br> <br>Total annual volume of fresh water abstraction for domestic/public water use. This is the sum of surface water and groundwater use. Reference year 2010. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />features, view_twap_socioeconomicEPSG:4326igrac:twap_socioeconomic_annual_bluewabstr_industrialParameter 8.4.1.2 - Global Inventory - Socio-economic<br> <br>Total annual volume of fresh water abstraction for industrial use. This is the sum of surface water and groundwater use. Reference year 2010. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />features, view_twap_socioeconomicEPSG:4326igrac:twap_socioeconomic_annabstrcountryParameter 8.1.1 - Global Inventory - Socio-economic<br> <br>Annual volume of groundwater abstraction (from wells or any other device to abstract groundwater). Reference year 2010. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />features, view_twap_socioeconomicEPSG:4326igrac:twap_socioeconomic_annual_gwabstr_domesticParameter 8.2.1.1 - Global Inventory - Socio-economic<br> <br>Annual volume of groundwater abstraction (from wells or any other device to abstract groundwater) for domestic/public water use. Reference year 2010. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />features, view_twap_socioeconomicEPSG:4326igrac:twap_socioeconomic_annual_gwabstr_industrialParameter 8.2.1.2 - Global Inventory - Socio-economic<br> <br>Annual volume of groundwater abstraction (from wells or any other device to abstract groundwater) for industrial use. Industrial use covers all use other than domestic and agricultural. Reference year 2010. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />features, view_twap_socioeconomicEPSG:4326igrac:twap_environmental_percgwdepecosysParameter 7.3.2 - Global Inventory - Environmental <br> <br>Percentage of surface area which is covered by groundwater dependent ecosystems. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_environmental, featuresEPSG:4326igrac:twap_hydrogeological_gwdepletion20002010Parameter 6.6.1 - Global Inventory – Hydrogeological<br> <br>Observed rate of long-term progressive decrease of groundwater storage (accompanied by steadily declining groundwater levels). Preferred period for reporting: 2000-2010. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_hydrogeological_gwdischParameter 6.8.1 - Global Inventory – Hydrogeological<br> <br>Predominant natural groundwater discharge mechanism. This can be springs, river base flow, etc., but excludes groundwater abstraction. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_environmental_percpollutionParameter 7.2.2 - Global Inventory - Environmental <br> <br>Percentage of the surface area which is affected by significant pollution. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_environmental, featuresEPSG:4326igrac:twap_environmental_gwqualityParameter 7.2.1 - Global Inventory - Environmental <br> <br>General indication of the occurrence of groundwater pollution. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_environmental, featuresEPSG:4326igrac:twap_legalaspects_qlt_gwprtzoneParameter 9.4.6 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_hydrogeological_avgannrechargeParameter 6.1.2 - Global Inventory – Hydrogeological<br> <br>Long term average annual volume of recharge that reaches the aquifer (sum of natural, artificial and induced recharge). Average calculated for the period 2000-2010 (provided data were available for that period). <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_legalaspects_qlt_gwabspermitsParameter 9.4.1 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />Legal/InstitutionalEPSG:4326twap_public:twap_ns_legal_institutionalaspectsParameter 9.2 - Global Inventory - Legal & Institutional<br> <br>Existence of (international) institutions with a mandate on transboundary groundwater. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />keywordsEPSG:4326igrac:twap_legalaspects_qlt_lnduseregParameter 9.4.5 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326twap_public:twap_ns_legal_legalaspectsParameter 9.1 - Global Inventory - Legal & Institutional<br> <br>Existence of an international agreement related to transboundary groundwater in the state. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />keywordsEPSG:4326igrac:twap_legalaspects_qnt_gwabsmonitgovParameter 9.3.4 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_monitgovParameter 9.4.4 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_gwabsobligmonitParameter 9.3.3 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_obligmonitParameter 9.4.3 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_obligstudiesParameter 9.4.2 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_gwabsobligstudiesParameter 9.3.2 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_gwabspermitsParameter 9.3.1 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_hydrogeological_predconnectParameter 6.3.1.3 - Global Inventory – Hydrogeological<br> <br>Interconnected porosity that contributes to groundwater flow. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_hydrogeological_predaqlitoParameter 6.2.1 - Global Inventory – Hydrogeological<br> <br>Most prominent lithology of the aquifer. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_hydrogeological_predpriporstParameter 6.3.1.1 - Global Inventory – Hydrogeological<br> <br>Primary porosity: porosity formed during the deposition of the sediment or from vesicles in igneous rocks. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_hydrogeological_predsecporstParameter 6.3.1.2 - Global Inventory - Hydrogeological<br> <br>Secondary porosity: porosity formed by either dissolution or fracturing after lithification of the rocks. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_legalaspects_qnt_protcareasParameter 9.3.5 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_publawarParameter 9.3.12 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Suasive / indirect measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />Legal/InstitutionalEPSG:4326igrac:twap_legalaspects_qlt_publawarParameter 9.4.13 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Suasive / indirect measure. <br /> <br>GP: Global Inventory Parameter provided by national experts<br />.twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qlt_landfieldsParameter 9.4.10 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qlt_wstdispParameter 9.4.8 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qlt_hzubstParameter 9.4.7 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qlt_wtrtreParameter 9.4.9 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />features, Groundwater quality, Legal/Institutional, twap_legalaspects, Water treatmentEPSG:4326igrac:twap_legalaspects_qlt_oldwllParameter 9.4.12 - Global Inventory - Legal & Institutional<br> <br>Measure for the protection of groundwater quality. Regulatory/direct measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />Legal/InstitutionalEPSG:4326igrac:twap_legalaspects_qnt_resttaxenergParameter 9.3.9 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Suasive / indirect measure.<br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_environmental_percdepthgwlvllessParameter 7.3.1 - Global Inventory - Environmental <br> <br>Percentage of surface area where the depth of the groundwater table is less than 5m below surface. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_environmental, featuresEPSG:4326igrac:twap_hydrogeological_sourcegwrechParameter 6.7.1 - Global Inventory – Hydrogeological<br> <br>Main source of groundwater recharge, which can be natural (e.g. precipitation, from runoff or surface water) or human induced (e.g. managed aquifer recharge, return flow from irrigation). <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_legalaspects_qnt_subsenergParameter 9.3.13 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Suasive / indirect measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_subswatersavParameter 9.3.10 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Suasive / indirect measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_subswllParameter 9.3.14 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Suasive / indirect measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_taxesgwabstParameter 9.3.8 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Suasive / indirect measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_legalaspects_qnt_taxeswllParameter 9.3.7 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Suasive / indirect measure. Tax related to number of wells, but not related to volume of water abstracted. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326igrac:twap_hydrogeological_totgwvolParameter 6.5.1 - Global Inventory – Hydrogeological<br> <br>Total volume of water stored in the aquifer. Volume is equal to the saturated volume of the aquifer multiplied by the porosity. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_hydrogeological_transmissivityParameter 6.4.1 - Global Inventory – Hydrogeological Rate at which water is transferred through a unit width of an aquifer under a unit hydraulic gradient. <br /> GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_environmental_percgwnotdrinkParameter 7.1.1 - Global Inventory - Environmental<br> <br>Percentage of surface area where natural groundwater quality does not satisfy local drinking water standards (i.e: percentage of aquifer area affected by natural salinity, arsenic, fluoride, etc). <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_environmental, featuresEPSG:4326igrac:twap_hydrogeological_predvertconnectParameter 6.3.2 - Global Inventory – Hydrogeological<br> <br>Vertical connectivity between layers in the case of an aquifer system. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_hydrogeological, featuresEPSG:4326igrac:twap_aquiferdata_vertthicknessParameter 5.3.3 - Global Inventory - Hydrogeological<br> <br>Full vertical thickness of the aquifer or aquifer system including aquitards/aquicludes. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />Aquifer thicknessEPSG:4326igrac:twap_legalaspects_qnt_wellretbonParameter 9.3.11 - Global Inventory - Legal & Institutional<br> <br>Measure to control groundwater abstraction. Suasive / indirect measure. <br /> <br>GP: Global Inventory Parameter provided by national experts. <br />twap_legalaspects, featuresEPSG:4326BGS_groundwater:bgs_geol_angolaAfrica Groundwater Atlas country hydrogeology maps (Version 1.0, 2019). BGS Permission CP19/089 © UKRI 2019. All rights reserved. Original Maps available for download from BGS: https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html These maps are the product of the Africa Groundwater Atlas project. The Africa Groundwater Atlas is an online resource that provides a summary of the groundwater resources of 51 African countries, and a gateway to further information. The Africa Groundwater Atlas is available at: https://www.bgs.ac.uk/africagroundwateratlas/index.cfm The Africa Groundwater Atlas project was jointly funded by DFID, NERC and ESRC; supported by the International Association of Hydrogeologists (IAH); and carried out by the British Geological Survey (BGS) in partnership with hydrogeologists across Africa. It is a part of the Unlocking the Potential of Groundwater for the Poor (UPGro) Research Programme, which focused on improving the evidence base around groundwater availability and management in sub-Saharan Africa, to enable the sustainable use of groundwater that benefits the poor. More information on the Africa Groundwater Atlas country hydrogeology maps is available in this report: Ó Dochartaigh, B. 2019. User Guide: Africa Groundwater Atlas Country Hydrogeology Maps, Version 1.1. This report is provided as a pdf download with each of the maps. It can also be downloaded from the web here: http://nora.nerc.ac.uk/id/eprint/523272/ The Africa Groundwater Atlas country hydrogeology maps are released under a Creative Commons ‘Attribution/Share Alike’ (CC BY SA) licence.Geological mapEPSG:4326BGS_groundwater:bgs_geol_chadAfrica Groundwater Atlas country hydrogeology maps (Version 1.0, 2019). BGS Permission CP19/089 © UKRI 2019. All rights reserved. Original Maps available for download from BGS: https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html These maps are the product of the Africa Groundwater Atlas project. The Africa Groundwater Atlas is an online resource that provides a summary of the groundwater resources of 51 African countries, and a gateway to further information. The Africa Groundwater Atlas is available at: https://www.bgs.ac.uk/africagroundwateratlas/index.cfm The Africa Groundwater Atlas project was jointly funded by DFID, NERC and ESRC; supported by the International Association of Hydrogeologists (IAH); and carried out by the British Geological Survey (BGS) in partnership with hydrogeologists across Africa. It is a part of the Unlocking the Potential of Groundwater for the Poor (UPGro) Research Programme, which focused on improving the evidence base around groundwater availability and management in sub-Saharan Africa, to enable the sustainable use of groundwater that benefits the poor. More information on the Africa Groundwater Atlas country hydrogeology maps is available in this report: Ó Dochartaigh, B. 2019. User Guide: Africa Groundwater Atlas Country Hydrogeology Maps, Version 1.1. This report is provided as a pdf download with each of the maps. It can also be downloaded from the web here: http://nora.nerc.ac.uk/id/eprint/523272/ The Africa Groundwater Atlas country hydrogeology maps are released under a Creative Commons ‘Attribution/Share Alike’ (CC BY SA) licence.Geological mapEPSG:4326BGS_groundwater:bgs_geol_djiboutiAfrica Groundwater Atlas country hydrogeology maps (Version 1.0, 2019). BGS Permission CP19/089 © UKRI 2019. All rights reserved. Original Maps available for download from BGS: https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html These maps are the product of the Africa Groundwater Atlas project. The Africa Groundwater Atlas is an online resource that provides a summary of the groundwater resources of 51 African countries, and a gateway to further information. The Africa Groundwater Atlas is available at: https://www.bgs.ac.uk/africagroundwateratlas/index.cfm The Africa Groundwater Atlas project was jointly funded by DFID, NERC and ESRC; supported by the International Association of Hydrogeologists (IAH); and carried out by the British Geological Survey (BGS) in partnership with hydrogeologists across Africa. It is a part of the Unlocking the Potential of Groundwater for the Poor (UPGro) Research Programme, which focused on improving the evidence base around groundwater availability and management in sub-Saharan Africa, to enable the sustainable use of groundwater that benefits the poor. More information on the Africa Groundwater Atlas country hydrogeology maps is available in this report: Ó Dochartaigh, B. 2019. User Guide: Africa Groundwater Atlas Country Hydrogeology Maps, Version 1.1. This report is provided as a pdf download with each of the maps. It can also be downloaded from the web here: http://nora.nerc.ac.uk/id/eprint/523272/ The Africa Groundwater Atlas country hydrogeology maps are released under a Creative Commons ‘Attribution/Share Alike’ (CC BY SA) licence.Geological mapEPSG:4326groundwater:Global_Groundwater_Monitoring_Network_(GGMN)The Global Groundwater Monitoring Network (GGMN) is a collaborative initiative that collects and shares groundwater monitoring data, including groundwater levels, quality parameters, and other relevant data and metadata from national and sub-national authorities. The GGMN aims to provide reliable, comprehensive data to support groundwater research and enhance our understanding of global groundwater resources.   We sincerely thank the national and sub-national authorities, such as geological surveys, Ministries of Water, Environment, and Public Works, water boards, hydrological services, and others, for generously sharing their in-situ data with us. If you believe your institution could contribute to our network, please contact us at info@un-igrac.org.   Most of the GGMN data is open and available under the CC BY 4.0 licence. Please refer to the readme file for specific details when downloading.   How to cite: IGRAC (YYYY) - The Global Groundwater Monitoring Network (GGMN). Retrieved from https://ggmn.un-igrac.org/ (Accessed [DD-MM-YYYY]). DOI: https://doi.org/10.58154/6Z0Y-DA34Groundwater monitoringEPSG:4326geonode:Global_MAR_Inventory<p>This is the latest version of the Global MAR Inventory (22/12/2020). The global MAR Inventory contains data and parameters of MAR case studies over the world. Parameters include site name, MAR type, year of scheme deployment, the source of infiltration water, the final use of abstracted water, as well as the main objectives of the project. The data shown in this portal have been made available by INOWAS (TU Dresden, Germany and funded by the German Federal Ministry of Education and Research) and the DEMEAU project (European Union FP7 project consortium). The MAR Inventory has also received the support of the IAH MAR Commission. If you have information to update and correct site data in this database, or if you have new MAR sites that should be included in the database, please fil in the submission form and help us to improve access to information on MAR sites: https://www.un-igrac.org/global-mar-inventory-site-submission-form For more information on the Global MAR Inventory: Stefan C. &amp; Ansems N. (2017) Web-based global inventory of managed aquifer recharge applications. Sustain. Water Resour. Manag. <a href="https://doi.org/10.1007/s40899-017-0212-6">https://doi.org/10.1007/s40899-017-0212-6</a></p> <p>If you want to contribute to the Global MAR Inventory, please use the submission form <a href="https://www.un-igrac.org/global-mar-inventory-site-submission-form">https://www.un-igrac.org/global-mar-inventory-site-submission-form</a></p>Managed Aquifer Recharge (MAR)EPSG:4326geonode:Granice_SWATfeatures, Granice_SWATEPSG:4326geonode:gromopo_mapdataGroundwater models are crucial for understanding groundwater science and sustainability but they are not consistently and openly shared. You can explore or share groundwater model data, knowledge, and insights through this unique portal of regional and global numerical groundwater models. We've made it easy! Fly around the world on our map or grab a coffee and share your first model in less than 10 minutes!   Submit your model here: https://gromopo.streamlit.app/   Your model will appear in this portal in the next update.   Last update: 24 April 2025  gromopo_mapdata, featuresEPSG:4326twap_public:twap_sids_socioeconomic_gwasbtractionagridescriptionAgricultureEPSG:4326twap_public:twap_sids_socioeconomic_gwabstractiondomdescriptionWater supplyEPSG:4326twap_public:twap_sids_socioeconomic_gwabstractinddescriptionkeywordsEPSG:4326twap_public:twap_sids_environmental_percgwdepecosysislanddescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_gwdepletiondescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_gwdischdescriptionkeywordsEPSG:4326groundwater:Groundwater_monitoring_data_(the_Gambia)This is a subset of the GGMN dataset, containing the monitoring data from the Gambia. Groundwater monitoringEPSG:4326twap_public:twap_sids_legal_qlt_gwprtzonedescriptionkeywordsEPSG:4326twap_public:twap_sids_legal_qnt_gwwllpermitsdescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_horizontalextdescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_hydconductivitydescriptionkeywordsEPSG:4326diktas:DK_HYG_HydrogeologyHydrogeological mapEPSG:4326BGS_groundwater:bgs_hydrogeol_cameroonAfrica Groundwater Atlas country hydrogeology maps (Version 1.0, 2019). BGS Permission CP19/089 © UKRI 2019. All rights reserved. Original Maps available for download from BGS: https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html These maps are the product of the Africa Groundwater Atlas project. The Africa Groundwater Atlas is an online resource that provides a summary of the groundwater resources of 51 African countries, and a gateway to further information. The Africa Groundwater Atlas is available at: https://www.bgs.ac.uk/africagroundwateratlas/index.cfm The Africa Groundwater Atlas project was jointly funded by DFID, NERC and ESRC; supported by the International Association of Hydrogeologists (IAH); and carried out by the British Geological Survey (BGS) in partnership with hydrogeologists across Africa. It is a part of the Unlocking the Potential of Groundwater for the Poor (UPGro) Research Programme, which focused on improving the evidence base around groundwater availability and management in sub-Saharan Africa, to enable the sustainable use of groundwater that benefits the poor. More information on the Africa Groundwater Atlas country hydrogeology maps is available in this report: Ó Dochartaigh, B. 2019. User Guide: Africa Groundwater Atlas Country Hydrogeology Maps, Version 1.1. This report is provided as a pdf download with each of the maps. It can also be downloaded from the web here: http://nora.nerc.ac.uk/id/eprint/523272/ The Africa Groundwater Atlas country hydrogeology maps are released under a Creative Commons ‘Attribution/Share Alike’ (CC BY SA) licence.Hydrogeological mapEPSG:4326BGS_groundwater:bgs_hydrogeol_congoAfrica Groundwater Atlas country hydrogeology maps (Version 1.0, 2019). BGS Permission CP19/089 © UKRI 2019. All rights reserved. Original Maps available for download from BGS: https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html These maps are the product of the Africa Groundwater Atlas project. The Africa Groundwater Atlas is an online resource that provides a summary of the groundwater resources of 51 African countries, and a gateway to further information. The Africa Groundwater Atlas is available at: https://www.bgs.ac.uk/africagroundwateratlas/index.cfm The Africa Groundwater Atlas project was jointly funded by DFID, NERC and ESRC; supported by the International Association of Hydrogeologists (IAH); and carried out by the British Geological Survey (BGS) in partnership with hydrogeologists across Africa. It is a part of the Unlocking the Potential of Groundwater for the Poor (UPGro) Research Programme, which focused on improving the evidence base around groundwater availability and management in sub-Saharan Africa, to enable the sustainable use of groundwater that benefits the poor. More information on the Africa Groundwater Atlas country hydrogeology maps is available in this report: Ó Dochartaigh, B. 2019. User Guide: Africa Groundwater Atlas Country Hydrogeology Maps, Version 1.1. This report is provided as a pdf download with each of the maps. It can also be downloaded from the web here: http://nora.nerc.ac.uk/id/eprint/523272/ The Africa Groundwater Atlas country hydrogeology maps are released under a Creative Commons ‘Attribution/Share Alike’ (CC BY SA) licence.Hydrogeological mapEPSG:4326BGS_groundwater:bgs_hydrogeol_ghanaAfrica Groundwater Atlas country hydrogeology maps (Version 1.0, 2019). BGS Permission CP19/089 © UKRI 2019. All rights reserved. Original Maps available for download from BGS: https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html These maps are the product of the Africa Groundwater Atlas project. The Africa Groundwater Atlas is an online resource that provides a summary of the groundwater resources of 51 African countries, and a gateway to further information. The Africa Groundwater Atlas is available at: https://www.bgs.ac.uk/africagroundwateratlas/index.cfm The Africa Groundwater Atlas project was jointly funded by DFID, NERC and ESRC; supported by the International Association of Hydrogeologists (IAH); and carried out by the British Geological Survey (BGS) in partnership with hydrogeologists across Africa. It is a part of the Unlocking the Potential of Groundwater for the Poor (UPGro) Research Programme, which focused on improving the evidence base around groundwater availability and management in sub-Saharan Africa, to enable the sustainable use of groundwater that benefits the poor. More information on the Africa Groundwater Atlas country hydrogeology maps is available in this report: Ó Dochartaigh, B. 2019. User Guide: Africa Groundwater Atlas Country Hydrogeology Maps, Version 1.1. This report is provided as a pdf download with each of the maps. It can also be downloaded from the web here: http://nora.nerc.ac.uk/id/eprint/523272/ The Africa Groundwater Atlas country hydrogeology maps are released under a Creative Commons ‘Attribution/Share Alike’ (CC BY SA) licence.Hydrogeological mapEPSG:4326BGS_groundwater:bgs_hydrogeol_sudanAfrica Groundwater Atlas country hydrogeology maps (Version 1.0, 2019). BGS Permission CP19/089 © UKRI 2019. All rights reserved. Original Maps available for download from BGS: https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html These maps are the product of the Africa Groundwater Atlas project. The Africa Groundwater Atlas is an online resource that provides a summary of the groundwater resources of 51 African countries, and a gateway to further information. The Africa Groundwater Atlas is available at: https://www.bgs.ac.uk/africagroundwateratlas/index.cfm The Africa Groundwater Atlas project was jointly funded by DFID, NERC and ESRC; supported by the International Association of Hydrogeologists (IAH); and carried out by the British Geological Survey (BGS) in partnership with hydrogeologists across Africa. It is a part of the Unlocking the Potential of Groundwater for the Poor (UPGro) Research Programme, which focused on improving the evidence base around groundwater availability and management in sub-Saharan Africa, to enable the sustainable use of groundwater that benefits the poor. More information on the Africa Groundwater Atlas country hydrogeology maps is available in this report: Ó Dochartaigh, B. 2019. User Guide: Africa Groundwater Atlas Country Hydrogeology Maps, Version 1.1. This report is provided as a pdf download with each of the maps. It can also be downloaded from the web here: http://nora.nerc.ac.uk/id/eprint/523272/ The Africa Groundwater Atlas country hydrogeology maps are released under a Creative Commons ‘Attribution/Share Alike’ (CC BY SA) licence.Hydrogeological mapEPSG:4326omvs_public:basin_hydrogeological_unitsThis map results from the digitization of the map p.94 in : Ressources en Eau Et Gestion Des Aquifères Transfrontaliers de l’Afrique Du Nord Et Du Sahel - Analyse Globale (2005) ISARM-AFRICA, IHP-IV, Series on groundwater No. 11. References of the original map are unknownHydrogeological mapEPSG:4326diktas:DK_OTH_HydropowerPlantsHydropower plantEPSG:4326geonode:IRLBF_SPECIFIC_OPCJA_1_TESTfeatures, IRLBF_SPECIFIC_OPCJA_1_TESTEPSG:2180geonode:IRLBF_SPECIFIC_OPCJA_2_TESTfeatures, IRLBF_SPECIFIC_OPCJA_2_TESTEPSG:2180twap_public:twap_sids_environmental_increasesaltwatintrustiondescriptionkeywordsEPSG:4326twap_public:twap_sids_socioeconomic_inducedrechargedescriptionManaged Aquifer Recharge (MAR)EPSG:4326twap_public:twap_sids_socioeconomic_percinddepgwdescriptionIndustryEPSG:4326twap_public:twap_sids_legal_institutionalaspectsdescriptionkeywordsEPSG:4326twap_public:twap_sids_socioeconomic_percagridepgwdescriptionAgricultureEPSG:4326groundwater:Dataset_(Jasechko_et_al._2024)Jasechko, S., Seybold, H., Perrone, D. et al. Rapid groundwater decline and some cases of recovery in aquifers globally. Nature 625, 715–721 (2024). https://doi.org/10.1038/s41586-023-06879-8   Annual groundwater level data are available where the authors have received permission from the database manager to publish them. Additionally, only wells for which the senslope has been calculated are included. For the complete dataset, please refer to the publication directly.   The measurements are Depth To Water in meters  - annual median depth to groundwater (units of meters below reference point and/or groundwater surface) and Groundwater elevation - annual median groundwater elevation (units of meters above mean sea level).   This material is based on work supported by the National Science Foundation under grant nos. EAR-2048227 and EAR-2234213. This research was supported by funding from the Zegar Family Foundation. This material is based on work supported by the U.S. Geological Survey (USGS) through the California Institute for Water Resources (CIWR) under grant/cooperative agreement no. G21AP10611-00.   The views and conclusions contained in this article are those of the authors and should not be interpreted as representing the opinions or policies of the USGS/CIWR. Mention of trade names or commercial products does not constitute their endorsement by the USGS/CIWR. R.G.T. acknowledges the support of a fellowship (ref. 7040464) from the Canadian Institute for Advanced Research under the Earth 4D programme. S.J. acknowledges the Jack and Laura Dangermond Preserve (https://doi.org/10.25497/D7159W), the Point Conception Institute, and the Nature Conservancy for their support of this research.Groundwater monitoring, Monitoring, WellEPSG:4326diktas:DK_HYD_lakes_reservoirsdams, surface waterEPSG:4258twap_public:twap_sids_legal_qlt_lnduseregdescriptionGroundwater Quality, Legal/InstitutionalEPSG:4326diktas:DK_OTH_LandfillsDumpsiteWaste, LandfillEPSG:4326twap_public:twap_sids_legal_legalaspectsdescriptionkeywordsEPSG:4326mar_global:marpotential_jordan_catchmentThe selection of a suitable catchment generating enough runoff in a suitable quality is based mainly on three criteria. Areas fulfilling any of the below criteria are rated unsuitable: (a) rainfall <75 mm (b) inside the catchment of existing dams (all small catchments and the lower part of the large catchments) (c) land cover is built up, quarry or mudflat. The final score of suitable areas was based on the following formula: catchment suitability score = (5*score rain + 4*score slope + 3*score water harvesting structures + 2*score soil + score hydrogeology + score land use) / 16MAR suitability mappingEPSG:4326mar_global:marpotential_spainsource: DinaMAR. For more information, please visit http://www.dina-mar.es/MAR suitability mappingEPSG:23030mar_global:marpotential_jordan_siteThe selection of a suitable dam and infiltration site is based on more criteria. Areas fulfilling any of the below criteria are rated unsuitable (constraint area): (a) rainfall <75 mm (b) land use: urban, quarry or mudflat (c) catchment of existing JVA dam (d) slope >5 % (e) areas over aquitards (f) aquifer thickness <20 m (g) areas over unsaturated aquifer (h) distance to contaminated well <1 km (i) distance to international border <2 km (j) distance to wadi >2 km (k) catchment size <18 km² The final score of suitable areas was based on the following formula: site suitability score = (1*score rain + 4*score slope + 5*score WH structures + 4*score soil + 4*score hydrogeology + 3*score land use + 2* score aquifer thickness + 5*score depth to water table + 1*score hydraulic gradient + 3*score gw salinity + 4*score faults + 4*score distance to roads + 4*score distance to wells + 3*score distance to contaminated wells) / 47MAR suitability mappingEPSG:4326omvs_public:Mauritania_geologyGeological mapEPSG:4326omvs_public:Mauritania_hydrogeological_unitsHydrogeological mapEPSG:4326twap_public:twap_sids_environmental_meanactevapotranspirationdescriptionkeywordsEPSG:4326twap_public:twap_sids_environmental_meanprecipitationdescriptionkeywordsEPSG:4326diktas:DK_OTH_miningMiningEPSG:4326groundwater:Netherlands_-_Geological_Service_of_the_NetherlandsGroundwater levels from the Netherlands were obtained via the Basisregistratie Ondergrond (BRO):https://basisregistratieondergrond.nl/   To access data directly from BRO, please visit:https://www.broloket.nl/ondergrondgegevens   BRO is not involved in any of the derivative work and does not necessarily endorse the GGMN or its objectives.   Data is shared in the GGMN under the CC BY 4.0 licence.Groundwater monitoringEPSG:4326geonode:Non_Suitable_area_ASRfeatures, Non_Suitable_area_ASREPSG:2180geonode:Non_Suitable_area_IRLBFfeatures, Non_Suitable_area_IRLBFEPSG:2180geonode:Non_Suitable_area_ditchesfeatures, Non_Suitable_area_ditchesEPSG:2180geonode:Non_Suitable_area_infiltration_pondsfeatures, Non_Suitable_area_infiltration_pondsEPSG:2180geonode:Non_Suitable_area_underground_damfeatures, Non_Suitable_area_underground_damEPSG:2180geonode:Non_suitable_areafeatures, Non_suitable_areaEPSG:2180geonode:Non_suitable_area_recharge_damfeatures, Non_suitable_area_recharge_damEPSG:2180twap_public:twap_sids_legal_qnt_gwabsobligmonitdescriptionMonitoring, Legal/InstitutionalEPSG:4326twap_public:twap_sids_legal_qlt_obligstudiesdescriptionLegal/Institutional, Groundwater protectionEPSG:4326twap_public:twap_sids_legal_qnt_gwabsobligstudiesdescriptionLegal/Institutional, Groundwater abstractionEPSG:4326geonode:pfas_contaminationThe Forever Pollution Map was created by Le Monde and its 17 partners from the cross-border investigation. The Forever Pollution Project is a collaboration of journalists and media from across Europe, unveiling the scale and character of the pollution with PFAS.    It is the first map to show the extent of Europe's contamination by per- and polyfluoroalkyl substances (PFAS). The Forever Pollution Project was initiated by Tim Luimes (Investigative Desk, Netherlands). A mapping methodology was developed by Stéphane Horel (Le Monde, France) modeled over inspiration from US scientists. The investigation was carried out by a core team with journalists from five countries from late 2021 and onwards.This map layer all the PFAS known contamination in groundwater. The original map shared by le monde shows PFAS production facilities, some sites where PFAS are used, as well as sites where contamination has been detected and those that are likely to be contaminated.   Reference: Forever Pollution Project   The dataset cannot be downloaded from the GGIS platform; however, it is available for download via this link.   This data is freely reusable under the following conditions: credit the Forever Pollution Project and the Le Monde webpage, do not use the data for commercial purposes, and notify the project team at horel[@]lemonde.fr.features, pfas_contamination, Groundwater qualityEPSG:4326twap_public:twap_sids_socioeconomic_percpopulationsanitationservicedescriptionSanitationEPSG:4326twap_public:twap_sids_socioeconomic_percpopulationwatersupplydescriptionPopulationEPSG:4326twap_public:twap_sids_environmental_percpollutiondescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_porositydescriptionkeywordsEPSG:4326diktas:DK_CLC_PrecipitationPrecipitationEPSG:4326diktas:DK_CLC_IsohyetsPrecipitationEPSG:4326twap_public:twap_sids_hydrogeological_predconnectdescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_predaqlitodescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_predpriporstdescriptionkeywordsEPSG:4326twap_public:twap_sids_hydrogeological_predsecporstdescriptionkeywordsEPSG:4326twap_public:twap_sids_legal_qnt_protcareasdescriptionProtected areasEPSG:4326twap_public:twap_sids_socioeconomic_percdomdepgwdescriptionWater supplyEPSG:4326twap_public:twap_sids_legal_qnt_publawardescriptionLegal/InstitutionalEPSG:4326twap_public:twap_sids_legal_qlt_publawardescriptionLegal/InstitutionalEPSG:4326twap_public:twap_rainfall_mmyrdescriptionkeywordsEPSG:4326diktas:DK_OTH_RamsarAreasWetland, Protected areaEPSG:4326twap_public:twap_sids_legal_qlt_landfieldsdescriptionkeywordsEPSG:4326twap_public:twap_sids_legal_qlt_wstdispdescriptionWaste, Legal/InstitutionalEPSG:4326twap_public:twap_sids_legal_qlt_hzubstdescriptionkeywordsEPSG:4326twap_public:twap_sids_legal_qlt_wtrtredescriptionLegal/Institutional, Water treatmentEPSG:4326twap_public:twap_sids_legal_qnt_resttaxenergdescriptionLegal/InstitutionalEPSG:4326diktas:DK_HYD_basinsDrainage basinEPSG:4326geonode:River_Specificfeatures, River_SpecificEPSG:4326diktas:DK_HYD_riverssurface waterEPSG:4258geonode:Riversfeatures, RiversEPSG:2180geonode:Rivers0features, RiversEPSG:2180diktas:DK_HYD_RiversLakes_ALBsurface waterEPSG:4326diktas:DK_HYD_RiversStreamssurface waterEPSG:4326unhcr:unhcr_roadsVariable: Roads Description: Line distribution of roads in the area Dataset: OpenStreetMap downloadable data, obtained from https://www.geofabrik.de/data/download.html Accessed 06-05-2020 Authorship: © OpenStreetMap contributors https://www.openstreetmap.org/copyrightRoadsEPSG:4326geonode:Rzekifeatures, RzekiEPSG:2180twap_public:twap_ind_sids_mannualgwrechargedepthIndicator 1.1 - SIDS.<br> <br>Long-term average groundwater recharge (including man-made components like return-flows, induced recharge and artificial recharge) [m3/yr], divided by the surface area of the island [m2]. Unit: [mm/yr] or [litre/m2/yr]. <br /> <br>S: SIDS indicator. <br />Groundwater rechargeEPSG:4326twap_public:twap_ind_sids_mannualrenewablegwpercapIndicator 1.2 - SIDS.<br> <br>Groundwater recharge (including man-made components like return-flows, induced recharge and artificial recharge) [m3/yr], divided by the number of inhabitants on top of the aquifer [capita]. <br /> <br>SI: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_natbackgwqualityIndicator 1.3 - SIDS.<br> <br>Percentage of surface area of the aquifer where the natural groundwater quality satisfies local drinking water standards (i.e. percentage of aquifer area which is not affected by natural salinity, arsenic, fluoride, etc.). <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_aqbuffcapacityIndicator 1.4- SIDS.<br> <br>Volume of groundwater stored in the aquifer [m3] divided by groundwater recharge [m3/yr]. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_aqvulnerabilityclimchangeIndicator 1.5 - SIDS.<br> <br>Expected groundwater budget regime change in response to changes in climatic conditions. Indicator takes into account the degree of confinement, aquifer lithology, recharge and depth to groundwater table (see TWAP Groundwater methodology report for details). <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_aqvulnerabilitypollutionIndicator 1.6 - SIDS.<br> <br>Percentage of surface area where the aquifer is considered moderately to highly vulnerable to pollution. Indicator takes into account the degree of confinement, aquifer lithology and depth to groundwater table (see TWAP Groundwater methodology report for details). <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_humandepgwIndicator 2.1 - SIDS.<br> <br>Volume of groundwater used [m3/yr] expressed as a percentage of total volume of water used [m3/yr]. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_humandepgwdomesticIndicator 2.2 - SIDS.<br> <br>Volume of groundwater for domestic use [m3/yr] expressed as a percentage of total domestic water use [m3/yr]. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_humandepgwagricultIndicator 2.3 - SIDS.<br> <br>Volume of groundwater for agricultural use [m3/yr] expressed as a percentage of total agricultural water use [m3/yr]. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_humandepgwindustryIndicator 2.4 - SIDS.<br> <br>Volume of groundwater for industrial use [m3/yr] expressed as a percentage of total industrial water use m3/yr]. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_ecosystdepgwIndicator 2.5 - SIDS.<br> <br>Percentage of surface area of the aquifer where the phreatic water level is less than 5 m below the surface, or percentage of surface area of the aquifer covered by groundwater dependent ecosystems. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_prevelancespringsIndicator 2.6 - SIDS.<br> <br>Average annual groundwater discharge by springs [m3/yr] divided by Groundwater recharge [m3/yr]. (Springs are very sensitive to changes in groundwater budget, either from change in recharge or change in abstraction regime. Therefore spring discharge is a meaningful indicator of change.). <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_gwdepletion2Indicator 3.1 - SIDS.<br> <br>Observed rate of long-term progressive decrease of groundwater storage (accompanied by steadily declining groundwater levels), expressed as an equivalent depth of water averaged over the island area. Preferred period: 2000-2010. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_gwpollutionIndicator 3.2 - SIDS.<br> <br>Observed areal extent of polluted zones as a percentage of total aquifer area. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_saltwaterintrusionIndicator 3.3 - SIDS.<br> <br>Observed zones of saltwater intrusion as a percent­age of total island area (due to salinity exceeding drinking water quality standards). <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_popdensityIndicator 4.1 - SIDS.<br> <br>Number of inhabitants of the island [capita] divided by surface area of the island [km2]. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_gwdevelopmentstressIndicator 4.2 - SIDS.<br> <br>Total annual groundwater abstraction [m3/yr] divided by groundwater recharge [m3/yr]. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_transblegalframeworkIndicator 5.1 - SIDS.<br> <br>Existence, status and comprehensiveness of groundwater legislation. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_transbinstframeworkIndicator 5.2 - SIDS.<br> <br>Existence, mandate and capabilities of institutions or institutional arrangements for managing SIDS groundwater. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_controlgwabstractionIndicator 6.1 - SIDS.<br> <br>Current practices on the implementation of measures to control groundwater abstraction. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326twap_public:twap_ind_sids_gwqualityprotectionIndicator 6.2 - SIDS.<br> <br>Current practices on the implementation of groundwater quality protection. <br /> <br>S: SIDS indicator. <br />keywordsEPSG:4326omvs_public:SMASboundariesAquifer delineationEPSG:4326igrac:gwquality_salinitymapIGRAC (2012) - Saline and brackish groundwater at shallow and intermediate depths: genesis and world-wide occurrence.Groundwater pollution, SalinityEPSG:4326igrac:gwquality_salinity_coastIGRAC (2012) - Saline and brackish groundwater at shallow/intermediate depths.Groundwater pollutionEPSG:4326twap_public:twap_sids_environmental_percdepthgwlevelislanddescriptionkeywordsEPSG:4326igrac:sidsSmall Island Developing States (SIDS) are low-lying coastal countries that tend to share similar sustainable development challenges, including small but growing populations, limited resources, remoteness, susceptibility to natural disasters, vulnerability to external shocks, excessive dependence on international trade, and fragile environments. Their growth and development is also held back by high communication, energy and transportation costs, irregular international transport volumes, disproportionately expensive public administration and infrastructure due to their small size, and little to no opportunity to create economies of scale.sids, featuresEPSG:4326twap_public:twap_sids_hydrogeological_sourcegwrechdescriptionkeywordsEPSG:4326diktas:DK_HYG_basins_SubbasinsDrainage basinEPSG:4326twap_public:twap_sids_legal_qnt_subsenergdescriptionLegal/InstitutionalEPSG:4326twap_public:twap_sids_legal_qnt_subswatersavdescriptionkeywordsEPSG:4326twap_public:twap_sids_legal_qnt_subswlldescriptionLegal/InstitutionalEPSG:4326geonode:Suitable_area_ASRfeatures, Suitable_area_ASREPSG:2180geonode:Suitable_area_IRLBF0features, Suitable_area_IRLBFEPSG:2180geonode:Suitable_area_ditchesfeatures, Suitable_area_ditchesEPSG:2180geonode:Suitable_area_infiltration_ponds1features, Suitable_area_infiltration_pondsEPSG:4326geonode:Suitable_area_recharge_damfeatures, Suitable_area_recharge_damEPSG:2180geonode:Suitable_area_recharge_dam0Administrative boundaryEPSG:2180geonode:Suitable_area_underground_damfeatures, Suitable_area_underground_damEPSG:2180igrac:twap_aquiferdata_tbadelineationAquifer delineationEPSG:4326twap_public:twap_sids_legal_qnt_taxesgwabstdescriptionLegal/InstitutionalEPSG:4326twap_public:twap_sids_legal_qnt_taxeswlldescriptionLegal/InstitutionalEPSG:4326diktas:DK_HYG_TectonicBoundaryGeological structuresEPSG:4326groundwater:Test_Style_BWell and Monitoring data LayerMonitoring, WellEPSG:4326geonode:testlayerfeatures, testlayerEPSG:4326groundwater:Test_Style_CWell and Monitoring data LayerMonitoring, WellEPSG:4326twap_public:twap_sids_socioeconomic_anabstractionbluetotdescriptionGroundwater abstractionEPSG:4326twap_public:twap_sids_hydrogeological_tannspringdischargedescriptionkeywordsEPSG:4326twap_public:twap_sids_socioeconomic_totgwabstractiondescriptionGroundwater abstractionEPSG:4326twap_public:twap_sids_hydrogeological_totgwvoldescriptionkeywordsEPSG:4326twap_public:twap_sids_socioeconomic_totalpopulationcountry2010descriptionPopulationEPSG:4326twap_public:twap_sids_socioeconomic_totalpopulationisland2010descriptionPopulationEPSG:4326diktas:DK_TOP_TownsPopCitiesEPSG:4326diktas:DK_HYG_transboundary_aquifersTransboundary AquiferEPSG:4258twap_public:twap_river_basinDrainage basinEPSG:4326twap_public:twap_sids_hydrogeological_transmissivitydescriptionkeywordsEPSG:4326unhcr:unhcr_boreholesWater points data from the National Inventory of Drinking Water Supply Works (l'Inventaire National des Ouvrages d'Approvisionnement en Eau Potable) done by the Ministry of Water and Sanitation of Burkina Faso Dataset: Results of the National Inventory of Drinking Water Supply Works (INO) for 2018. http://www.eauburkina.org/index.php/resultats-ino Accessed 06-05-2020 Authorship: Ministry of Water and Sanitation of Burkina Faso (2018) "Résultats de l'Inventaire National des Ouvrages d'Approvisionnement en Eau Potable de 2018.Groundwater for RefugeesEPSG:4326twap_public:twap_sids_environmental_percgwnotdrinkdescriptionDrinking waterEPSG:4326twap_public:twap_ind_mod_ca_ind1_1_gwrecharge_incl_artificial_2010_mm_yrIndicator 1.1 – WaterGAP model - Current state.<br> <br>Total groundwater recharge [m3/yr] divided by the surface area [m2] of the complete aquifer. Total groundwater recharge is the sum of natural groundwater recharge, recharge from surface water bodies and return flow from irrigation. Unit: [mm/yr] or [litre/m2/yr].<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ca_ind1_2_gwrecharge_percap_2010_mm_yrIndicator 1.2 - WaterGAP model - Current state.<br> <br>Groundwater recharge (including recharge from surface water bodies and return flows from irrigation) [m3/yr] divided by the number of inhabitants [capita] on top of the aquifer. Reference year for population: 2010.<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ca_ind2_1_humandependencygw_2010_percentIndicator 2.1 - WaterGAP model - Current state.<br> <br>Volume of groundwater used [m3/yr] expressed as a percentage of total volume of water used [m3/yr].<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ca_ind2_2_humandependencygw_domestic_2010_percentIndicator 2.2 - WaterGAP model - Current state.<br> <br>Volume of groundwater for domestic use [m3/yr] expressed as a percentage of total domestic water use [m3/yr].<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ca_ind2_3_humandependencygw_agricult_2010_percentIndicator 2.3 - WaterGAP model - Current state.<br> <br>Volume of groundwater for agricultural use [m3/yr] expressed as a percentage of total agricultural water use [m3/yr].<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ca_ind2_4_humandependencygw_industry_2010_percentIndicator 2.4 - WaterGAP model - Current state.<br> <br>Volume of groundwater for industrial use [m3/yr] expressed as a percentage of total industrial water use m3/yr].<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ca_ind3_1_gwdepletion_2000_2009_mm_yrIndicator 3.1 - WaterGAP model - Current state.<br> <br>Observed rate of long-term progressive decrease of groundwater storage (accompanied by steadily declining groundwater levels), expressed as an equivalent depth of water averaged over the aquifer area. Period: 2000-2010.<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ca_ind4_1_populationdensity_2010_persons_km2Indicator 4.1 - WaterGAP model - Current state.<br> <br>Number of inhabitants [capita] on top of the aquifer divided by the surface area of the aquifer [km2]. Reference year for population: 2010.<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ca_ind4_2_gwdevstress_2010_percentIndicator 4.2 - WaterGAP model - Current state.<br> <br>Total annual groundwater abstraction [m3/yr] divided by groundwater recharge [m3/yr].<br /> <br>WA: WaterGAP indicator at Aquifer level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ns_ind1_1_gwrecharge_incl_artificial_2010_mm_yrIndicator 1.1 – WaterGAP model - Current state<br> <br>Total groundwater recharge [m3/yr] divided by the surface area [m2] of the complete country segment of the aquifer. Total groundwater recharge is the sum of natural groundwater recharge, recharge from surface water bodies and return flow from irrigation. Unit: [mm/yr] or [litre/m2/yr].<br /> <br>WC: WaterGAP indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ns_ind1_2_gwrecharge_percap_2010_mm_yrIndicator 1.2 – WaterGAP model - Current state.<br> <br>Groundwater recharge (including recharge from surface water bodies and return flows from irrigation) [m3/yr] divided by the number of inhabitants [capita] on top of the country segment of the aquifer. Reference year for population: 2010.<br /> <br>WC: WaterGAP indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ns_ind2_1_humandependencygw_2010_percentIndicator 2.1 – WaterGAP model - Current state.<br> <br>Volume of groundwater used [m3/yr] expressed as a percentage of total volume of water used [m3/yr].<br /> <br>WC: WaterGAP indicator at Country segment level.<br />Transboundary Aquifers, Groundwater abstractionEPSG:4326twap_public:twap_ind_mod_ns_ind2_2_humandependencygw_domestic_2010_percentIndicator 2.2 – WaterGAP model - Current state.<br> <br>Volume of groundwater for domestic use [m3/yr] expressed as a percentage of total domestic water use [m3/yr].<br /> <br>WC: WaterGAP indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ns_ind2_3_humandependencygw_agricult_2010_percentIndicator 2.3 – WaterGAP model - Current state.<br> <br>Volume of groundwater for agricultural use [m3/yr] expressed as a percentage of total agricultural water use [m3/yr].<br /> <br>WC: WaterGAP indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ns_ind2_4_humandependencygw_industry_2010_percentIndicator 2.4 – WaterGAP model - Current state.<br> <br>Volume of groundwater for industrial use [m3/yr] expressed as a percentage of total industrial water use m3/yr].<br /> <br>WC: WaterGAP indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ns_ind3_1_gwdepletion_2000_2009_mm_yrIndicator 3.1 – WaterGAP model - Current state.<br> <br>Observed rate of long-term progressive decrease of groundwater storage (accompanied by steadily declining groundwater levels), expressed as an equivalent depth of water averaged over the aquifer area. Period: 2000-2010.<br /> <br>WC: WaterGAP indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ns_ind4_1_populationdensity_2010_persons_km2Indicator 4.1 – WaterGAP model - Current state.<br> <br>Number of inhabitants [capita] on top of the country segment of the aquifer divided by the surface area of the country segment [km2]. Reference year for population: 2010.<br /> <br>WC: WaterGAP indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_ind_mod_ns_ind4_2_gwdevstress_2010_percentIndicator 4.2 – WaterGAP model - Current state.<br> <br>Total annual groundwater abstraction [m3/yr] divided by groundwater recharge [m3/yr].<br /> <br>WC: WaterGAP indicator at Country segment level.<br />keywordsEPSG:4326geonode:WL_end_drillingGroundwater levelEPSG:4326diktas:DK_OTH_WasteWaterWastewaterEPSG:4326groundwater:Groundwater_WellWell and Monitoring data LayerMonitoring, WellEPSG:4326twap_public:twap_sids_legal_qnt_wellretbondescriptionLegal/InstitutionalEPSG:4326twap_public:twap_proind_mod_ca_ind1_2_gwrecharge_percap_2030_percentchangeIndicator 1.2 - WaterGAP model - 2030 Projected (Model scenario: Constant future irrigated areas). <br> <br>Change in renewable groundwater resources per capita over the period 2010 – 2030 expressed as percentage of the 2010 value (indicator WA1.2). <br /> <br>WpA: WaterGAP Projected indicator at Aquifer level. <br />Groundwater recharge, Transboundary AquifersEPSG:4326twap_public:twap_proind_mod_ca_ind1_2_gwrecharge_percap_2050_percentchangeIndicator 1.2 - WaterGAP model - 2050 Projected (Model scenario: Constant future irrigated areas). <br> <br>Change in renewable groundwater resources per capita over the period 2010 – 2050 expressed as percentage of the 2010 value (indicator WA1.2). <br /> <br>WpA: WaterGAP Projected indicator at Aquifer level. <br />keywordsEPSG:4326twap_public:twap_proind_mod_ca_ind4_1_populationdensity_2030_percentchangeIndicator 4.1 - WaterGAP model - 2030 Projected (Model scenario: Constant future irrigated areas). <br> <br>Change in population density over the period 2010 – 2030 expressed as percentage of the 2010 value (indicator WA4.1). <br /> <br>WpA: WaterGAP Projected indicator at Aquifer level. <br />keywordsEPSG:4326twap_public:twap_proind_mod_ca_ind4_1_populationdensity_2050_percentchangeIndicator 4.1 - WaterGAP model - 2050 Projected (Model scenario: Constant future irrigated areas). <br> <br>Change in population density over the period 2010 – 2050 expressed as percentage of the 2010 value (indicator WA4.1). <br /> <br>WpA: WaterGAP Projected indicator at Aquifer level. <br />keywordsEPSG:4326twap_public:twap_proind_mod_ca_ind4_2_gwdevstress_2030_percentpointchangeIndicator 4.2 - WaterGAP model - 2030 Projected (Model scenario: Constant future irrigated areas). <br> <br>Change in groundwater development stress over the period 2010 – 2030. The 2010 value corresponds to indicator WA4.2. <br /> <br>WpA: WaterGAP Projected indicator at Aquifer level. <br />keywordsEPSG:4326twap_public:twap_proind_mod_ca_ind4_2_gwdevstress_2050_percentpointchangeIndicator 4.2 - WaterGAP model - 2050 Projected (Model scenario: Constant future irrigated areas). <br> <br>Change in groundwater development stress over the period 2010 – 2050. The 2010 value corresponds to indicator WA4.2. <br /> <br>WpA: WaterGAP Projected indicator at Aquifer level. <br />keywordsEPSG:4326twap_public:twap_proind_mod_ns_ind1_2_gwrecharge_percap_2050_percentchangeIndicator 1.2 - WaterGAP model - 2050 Projected (Model scenario: Constant future irrigated areas).<br> <br>Change in renewable groundwater resources per capita over the period 2010 – 2050 expressed as percentage of the 2010 value (indicator WC1.2). <br /> <br>WpC: WaterGAP Projected indicator at Country segment level.<br />Groundwater recharge, Transboundary AquifersEPSG:4326twap_public:twap_proind_mod_ns_ind1_2_gwrecharge_percap_2030_percentchangeIndicator 1.2 - WaterGAP model - 2030 Projected (Model scenario: Constant future irrigated areas).<br> <br>Change in renewable groundwater resources per capita over the period 2010 – 2030 expressed as percentage of the 2010 value (indicator WC1.2).<br /> <br>WpC: WaterGAP Projected indicator at Country segment level.<br />keywordsEPSG:4326twap_public:twap_proind_mod_ns_ind4_1_populationdensity_2030_percentchangeIndicator 4.1 - WaterGAP model - 2030 Projected (Model scenario: Constant future irrigated areas).<br> <br>Change in population density over the period 2010 – 2030 expressed as percentage of the 2010 value (indicator WC4.1).<br /> <br>WpC: WaterGAP Projected indicator at Country segment level.<br />Population, Transboundary AquifersEPSG:4326twap_public:twap_proind_mod_ns_ind4_1_populationdensity_2050_percentchangeIndicator 4.1 - WaterGAP model - 2050 Projected (Model scenario: Constant future irrigated areas).<br /> <br>Change in population density over the period 2010 – 2050 expressed as percentage of the 2010 value (indicator WC4.1).<br /> <br>WpC: WaterGAP Projected indicator at Country segment level.<br />Population, Transboundary AquifersEPSG:4326twap_public:twap_proind_mod_ns_ind4_2_gwdevstress_2030_percentpointchangeIndicator 4.2 - WaterGAP model - 2030 Projected (Model scenario: Constant future irrigated areas).<br> <br>Change in groundwater development stress over the period 2010 – 2030. The 2010 value corresponds to indicator WC4.2.<br /> <br>WpC: WaterGAP Projected indicator at Country segment level.<br />Groundwater development stress, Transboundary AquifersEPSG:4326twap_public:twap_proind_mod_ns_ind4_2_gwdevstress_2050_percentpointchangeIndicator 4.2 - WaterGAP model - 2050 Projected (Model scenario: Constant future irrigated areas). <br> <br>Change in groundwater development stress over the period 2010 – 2050. The 2010 value corresponds to indicator WC4.2. <br /> <br>WpC: WaterGAP Projected indicator at Country segment level. <br />Groundwater development stress, Transboundary AquifersEPSG:4326twap_public:twap_hotspot_mod_ns_gwstressIndicator - WaterGAP model - Projected - Hotspots.<br> <br>Identification of aquifer hotspots under current and future conditions, based on indicators 4.2, 2.1 and 1.2. Percentages in the legend refer to future conditions. <br /> <br>WpcC: WaterGAP Combined Projected indicator at Country segment level. <br />keywordsEPSG:4326mar_global:marpotential_north_kenya_1aHigh potential for rock catchments, and for sanddams in the seasonal rivers with sandy riverbeds. The (seasonal) rivers without sandy bed have potential for open water storage in valley dams. Also potential for pans (an extra sealing may be required), subsurface dams, storage tanks and possible use of shallow groundwater.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_1bHigh potential for rock catchments, and for sanddams and subsurface dams in the seasonal rivers with sandy riverbeds. Potential for the use of shallow groundwater, pans (an extra sealing may be required), storage tanks and floodwater spreading to increase groundwater recharge.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_2abPotential for subsurface dams and sanddams when an impermeable layer is present. Sanddams have a higher potential near zone 1 where more pronounced riverbeds are expected. The potential for shallow wells and floodwater spreading to increase recharge depends on the underlying sediment, potential for pans and storage tanks.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_3aHigh potential for sanddams in the seasonal rivers with sandy riverbeds. Also potential for subsurface dams, storage tanks, pans, and possible use of shallow groundwater.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_3bHigh potential for sanddams and subsurface dams in the seasonal rivers with riverbeds with weathering products suitable for storage, potential for storage tanks, pans, and possible use of shallow groundwater.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_3cLess pronounced signature of the volcanic rocks, further field observations are required to specify the characteristics. Potential for valley dams and water pans (an extra sealing may be required). Run-off reduction measures like contour bunds and gully plugs may increase recharge.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_3dLess pronounced signature of the volcanic rocks, further field observations are required to specify the characteristics. Potential for pans (an extra sealing may be required) and storage tanks. Possible local potential for shallow groundwater.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_3ePotential for valley dams, pans (sealing is required, local materials probably suitable) and storage tanks. Shallow groundwater not common, but possible locations with shallow groundwater potential, recognizable by changes in the relief. Run-off reduction measures like contour bunds and gully plugs can increase recharge.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_3fPotential for pans (sealing is required, local materials are expected to be suitable for sealing) and storage tanks. Shallow groundwater not common, but possible locations with harder rock with shallow groundwater potential and springs e.g. at the edges of the plateaus.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_4bPotential for pans (an extra sealing may be required), storage tanks. Small potential for sand dams and subsurface dams. Possible potential for (deep) groundwater and shallow wells, floodwater spreading could be used to increase recharge.MAR suitability mappingEPSG:4326mar_global:marpotential_north_kenya_4dHigh potential for shallow groundwater use, direct aquifer infiltration, pans and storage tanks. Potential for subsurface dams when seasonal rivers with a sand bed are present at locations with an impermeable layer. Small dams, infiltration ponds and spate irrigation can be used to increase groundwater recharge.MAR suitability mappingEPSG:4326geonode:a__2021_TBA_GGIS_utf8Transboundary AquifersEPSG:4326igrac:agricultural_bluewabstrfeatures, twap_socioeconomic_annual_gwabstr_agriculturalEPSG:4326BGS_groundwater:bgs_sedim_sudanSediment mapEPSG:4326geonode:g3p_aquifers_set1_updated_v1features, g3p_aquifers_set1_updated_v1EPSG:4326geonode:greece1Groundwater Body (GWB)EPSG:4326geonode:laikipia_north_kenyakmzlaikipia_north_kenyakmz, featuresEPSG:4326geonode:laikipia_north_kenyakmz_9d279cba7e2d3d320ce04cc32aca091bipsia project laikipia north boundarieslaikipia_north_kenyakmz_9d279cba7e2d3d320ce04cc32aca091b, featuresEPSG:4326geonode:mali_hgGeological map, mali_hg, featuresEPSG:4326geonode:mali_hg_718655ba526ba69f34984231cd27efd6features, mali_hg_718655ba526ba69f34984231cd27efd6, Hydrogeological mapEPSG:4326geonode:mulu_kuchu___progetto_cosiavikmlshape di provafeatures, mulu_kuchu___progetto_cosiavikmlEPSG:4326geonode:recharge_dam_hufeatures, recharge_dam_huEPSG:4326geonode:sdg652_datasetfeatures, sdg652_datasetEPSG:4326geonode:sourcedatafig2features, sourcedatafig2, Aquifer delineationEPSG:4326geonode:sr_hranica_polylinefeatures, sr_hranica_polylineEPSG:25834geonode:transboundary_aquifers_basicinfoTransboundary AquifersEPSG:4326geonode:twap_sids_groundwatersystems_basicinformation0Small Island Developing StatesEPSG:4326igrac:twap_socioeconomic_annual_gwabstr_agricultural_admirefeatures, twap_socioeconomic_annual_gwabstr_agriculturalEPSG:4326geonode:zo_hranica_polylinefeatures, zo_hranica_polylineEPSG:25834absabs_2abs_3abs_4acosAddCoveragesAffineAggregateAndAreaarea2AreaGridarrayasinatanatan2attributeCountBandMergebandsBandSelectBarnesSurfacebetweenboundaryboundaryDimensionboundedByBoundsbufferBufferFeatureCollectionbufferWithSegmentsCategorizeceilcenterLinecentroidclassifyClassifyByRangeClipcollectGeometriesCollection_AverageCollection_BoundsCollection_CountCollection_MaxCollection_MedianCollection_MinCollection_NearestCollection_SumCollection_UniqueConcatenatecontainsContourcontrastconvertconvexHullConvolveCoveragecosCountCoverageClassStatsCropCoveragecrossesdarkendateDifferencedateFormatdateParsedensifydesaturatedifferencedimensiondisjointdisjoint3Ddistancedistance3Ddouble2boolDownloadDownloadAnimationDownloadEstimatorDownloadMapendAngleendPointenvenvelopeEqualAreaEqualIntervalequalsExactequalsExactToleranceequalToexpexteriorRingFeatureFeatureClassStatsfloorfootprintsgeometrygeometryTypegeomFromWKTgeomLengthGeorectifyCoverageGetFullCoveragegetGeometryNgetXgetYgetzgrayscalegreaterEqualThangreaterThanGridGroupCandidateSelectionHeatmaphslidIEEEremainderif_then_elseImportinin10in2in3in4in5in6in7in8in9inArrayInclusionFeatureCollectionint2bboolint2ddoubleinteriorPointinteriorRingNInterpolateintersectionIntersectionFeatureCollectionintersectsintersects3DisCachedisClosedisCoverageisEmptyisInstanceOfisLikeisNullisometricisRingisSimpleisValidisWithinDistanceisWithinDistance3DJenksJifflejsonArrayContainsjsonPointerlabelPointlanguagelapplylengthlessEqualThanlessThanlightenlistlistMultiplylitemliteratelogLRSGeocodeLRSMeasureLRSSegmentmapGetmaxmax_2max_3max_4minmin_2min_3min_4mincircleminimumdiameterminrectanglemixmoduloMultiplyCoveragesNearestNormalizeCoveragenorthFixnotnotEqualTonownumberFormatnumberFormat2numGeometriesnumInteriorRingnumPointsoctagonalenvelopeoffsetOroverlapsPagedUniqueparameterparseBooleanparseDoubleparseIntparseLongpgNearestpiPointBufferspointNpointOnLinePointStackerPolygonExtractionpolygonizePolyLabellerpowpropertyPropertyExistsQuantileQueryqueryCollectionquerySinglerandomRangeLookupRasterAsPointCollectionRasterZonalStatisticsRasterZonalStatistics2RecodeRectangularCliprelaterelatePatternreprojectReprojectGeometryrescaleToPixelsrintroundround_2roundDoublesaturateScaleCoveragesdo_nnsetCRSshadesimplifysinsizeSnapspinsplitPolygonsqrtStandardDeviationstartAnglestartPointStoreCoveragestrAbbreviatestrCapitalizestrConcatstrDefaultIfBlankstrEndsWithstrEqualsIgnoreCasestrIndexOfstringTemplatestrLastIndexOfstrLengthstrMatchesstrPositionstrReplacestrStartsWithstrStripAccentsstrSubstringstrSubstringStartstrToLowerCasestrToUpperCasestrTrimstrTrim2strURLEncodeStyleCoveragesymDifferencetantinttoDegreestoRadianstouchestoWKTTransformTransparencyFillunionUnionFeatureCollectionUniqueUniqueIntervalVectorToRasterVectorZonalStatisticsverticeswithin