Water
Water stress
WRI Aqueduct: where demand for water is high relative to available supply, a model, not a well log.
Read the card →Water
Groundwater table decline
Where Aqueduct 4.0 scores a falling groundwater table, a basin risk score, not a WHYMAP aquifer map and not a well log.
Map: Fix Planet from WRI Aqueduct 4.0 baseline groundwater table decline, 2023. The number is the indicator score from 0 to 5. Basins without a score stay grey. CC BY 4.0. Boundaries: Natural Earth. This is not the WHYMAP aquifer map.
What
WRI Aqueduct 4.0 publishes a baseline groundwater table decline indicator for sub-basins, scored from 0 to 5. The score summarizes modelled decline of the water table. It is not the BGR/UNESCO WHYMAP map of aquifer environments, and it is not the baseline water-stress score on the neighbouring card.
Why on this shelf
Water stress compares demand with supply. This card is the separate Aqueduct indicator for falling groundwater tables. WHYMAP remains the public hydrogeology atlas; it is not the layer drawn here.
How to read it
The colour is the Aqueduct score from 0 to 5. Grey land has no decline score in the baseline layer. A high score is a modelled decline, not a measured well depth and not a forecast that a city runs dry.
Caveats
Many basins have no decline score, so grey is missing data, not “no groundwater.” The indicator is a model. It is not the WHYMAP hydrogeology map and not IGRAC GGIS.
Sources
License
Aqueduct 4.0 is CC BY 4.0 (World Resources Institute). The map is the baseline groundwater table decline score. Cite Kuzma et al. 2023. This plate is not the WHYMAP Groundwater Resources of the World map.
Open source map →Related maps
Water
Global river basins
Nested sub-basin polygons for the whole planet (Pfafstetter levels), a hydrographic base map, not a stress index.
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Freshwater resources (AQUASTAT)
Country-level renewable water and withdrawals from FAO’s global water information system, statistics and country profiles, not a single stress raster.
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Global lakes (HydroLAKES)
Shoreline polygons for ~1.4 million lakes and reservoirs ≥10 ha, a lake inventory map, not river basins and not a stress index.
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Lakes and wetlands (GLWD v2)
Global inland waters in 33 waterbody and wetland classes, marshes, peatlands, intermittent water and more, not a second HydroLAKES shoreline layer.
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Water
Riverine flood risk
Baseline riverine flood risk from Aqueduct 4.0: a 0-5 basin score, not the water-stress score and not an inundation-depth map.
Read the card →