Quantitative maps of groundwater resources in Africa

The quantitative maps of groundwater resources in Africa provide continental-scale maps of groundwater productivity, groundwater storage, and depth to groundwater. Each map is available for download as a 5 km resolution grid (xyz ASCII file), and also as a high resolution PDF file. The quantitative maps are the first produced for Africa and are underpinned by dedicated case studies and systematic data/literature reviews. They are designed to show information at the continental, or regional scale (nominally at 1:20M). Detailed description of the methodology and a full list of data sources used to develop the groundwater storage and productivity maps can be found in the peer-reviewed paper and supplementary material, published in Environmental Research Letters (DOI 10.1088/1748-9326/7/2/024009). A full description of the methodology used to develop the depth of groundwater map can be found in the BGS Open Report: An initial estimate of depth to groundwater across Africa (https://nora.nerc.ac.uk/id/eprint/17907/1/OR11067.pdf).