Continental hydrogeological maps of Africa

Africa Groundwater Atlas >> Resource pages >> Groundwater and Hydrogeological Maps of Africa >> List of National Scale Groundwater Maps in Africa

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This page provides information on groundwater and hydrogeological maps that cover the whole continent of Africa. Here are two lists providing summary information, first on continental scale maps that cover Africa alone, and then on global scale maps that include Africa. Below this are more details of selected key maps. The maps are all listed in reverse order of age, with newest maps first.

If you know of maps that aren't described here but should be, please let us know! Email us: AfricaGWAtlas@bgs.ac.uk

List of Maps covering Africa alone

This lists maps that cover the whole continent of Africa, but no other area. They are listed in reverse order of age.

Map Title	Date	Scale	Editors	Publishing Organisation	Format	Where to find	Notes
Groundwater resources of Africa	2018			BGR / WHYMAP	Paper , pdf	Scanned image, with marginalia, viewable online	Produced for 7th Africa Water Week. Depicts current status on groundwater resources mapping in Africa. Includes cross sections, TBA maps and information from regional hydrogeological studies
Transboundary aquifers of Africa	2018			IGRAC and UNESCO-IHP	GIS; pdf	Available to view in Online map portal; pdf
Groundwater (aquifer) productivity for Africa	2012	nominal 1:20 million	MacDonald et al	BGS	xyz tab-delimited text file (easily convertible to raster/grid in GIS)	Download digital map	Part of Quantitative Maps of Africa set. Shows estimated relative aquifer productivity based on potential borehole yield (properly located, constructed etc) as a proxy, with 6 classes from Very High (> 20 l/s) to Very Low (< 0.1 l/s)
Groundwater storage for Africa	2012	nominal 1:20 million	MacDonald et al	BGS	xyz tab-delimited text file (easily convertible to raster/grid in GIS)	Download digital map	Part of Quantitative Maps of Africa set. Shows potential groundwater storage as water depth in mm, with 6 classes from 0 to > 50,000 mm
Depth to groundwater for Africa	2012	nominal 1:20 million	MacDonald et al	BGS	xyz tab-delimited text file (easily convertible to raster/grid in GIS)	Download digital map	Part of Quantitative Maps of Africa set. Shows potential groundwater storage as water depth in mm, with 6 classes from 0 to > 50,000 mm
Groundwater resources map of Africa	2008			WHYMAP	Scanned pdf map	Scanned pdf map	Extract from ‘Groundwater Resources map of the World
Carte hydrogeologique de l’Afrique	2008	1:10 million	Jean Jaques Seguin et al	BRGM		Project webpage	Not currently available to download
Hydrogeological map of Africa	1992	1:5 million	Safar Zitoun, M. & Nouiouat, A.C	Organisation Africaine de Cartographie et de Télédétection (OACT)		Scanned image available to view in WHYMAP/WHYMIS portal
Major Hydrogeological Formations (after Geological Map of Africa, 1:5,000,000)	1988	1:5 million		United Nations		Scanned image available to view in WHYMAP/WHYMIS portal

List of Maps of the World that include Africa

This lists global maps that include Africa. They are listed in reverse order of age.

Map Title	Date	Scale	Editors	Publishing Organisation	Format	Where to find
World Karst Aquifer Map	2017			WHYMAP	Vector shapefile; webmap service; view online; pdf poster; printed map	Download shapefile or poster pdf; web map service; view online on WHYMAP Viewer; for a printed copy contact whymap@bgr.de
Global transboundary aquifer (TBA) maps	2009, 2012, 2014, 2015, 2017			IGRAC and UNESCO-IHP	Shapefile; view online; printed map on poster	IGRAC online portal
Global Groundwater vulnerability to floods & droughts	2015	1: 25 million		WHYMAP	Vector shapefile; webmap service; view online; pdf poster; printed map	Download shapefile or poster pdf; web map service; view online on WHYMAP Viewer; for a printed copy contact whymap@bgr.de
Groundwater and river basins of the world	2012			WHYMAP	Vector shapefile; webmap service; view online; pdf poster; printed map	Download shapefile or poster pdf; web map service; view online on WHYMAP Viewer; for a printed copy contact whymap@bgr.de
Groundwater resources of the world	2008	1:25 million & 1:40 million		WHYMAP	Vector shapefile; webmap service; view online; pdf poster; printed map	Download shapefile or poster pdf; web map service; view online on WHYMAP Viewer or IGRAC online portal; for a printed copy contact whymap@bgr.de

Details of selected continental scale maps of Africa

Groundwater Resources of Africa

What the map shows

The map shows a background of country political borders, with a number of hydrogeological themes overlaid on this:

• Hydrogeological/aquifer categories. Three categories are distinguished: major groundwater basins; areas with complex hydrogeological structure; areas with local and shallow aquifers.
• Recharge zones. Five zones are distinguished: very high, high, medium, low and very low, ranging from over 300 mm/year to zero.
• Special groundwater features, including known areas of saline groundwater, natural groundwater discharge areas in arid regions, areas of known groundwater over abstraction, and areas of groundwater mining.
• Additional hydrological features (major rivers and lakes) and selected cities including those largely dependent on groundwater

How the map was developed

The map was developed within WHYMAP (the World-wide Hydrogeological Mapping and Assessment Programme), a joint consortium programme whose objective is to summarise groundwater information on a global scale in map form. The first edition of the map was published in 2008. A second edition (2018) was presented during the 7th Africa Water Week in Libreville, Gabon. It contains hydrogeological sections of regional aquifers as well as regional and transboundary hydrogeological surface information on the composition of geological units and their respective groundwater yield. Recharge was estimated for WHYMAP by University of Frankfurt, derived from the global hydrological model WaterGAP, the Global Runoff Data Centre (GRDC), the Global Precipitation Climatology Centre (GPCC), as well as numerous international experts and institutes. The map legend uses the International Standard Legend for Hydrogeological Maps (SLHyM) and a harmonisation methodology developed on the basis of the International Hydrogeological Map of Europe (IHME1500).

Purpose, uses and limitations of the map

The map was designed to be used as a planning tool to support the long term sustainable development and management of groundwater resources in Africa. The information on the map supports integrated management of water resources at regional level, and allows for further specific analysis, such as assessing the potential vulnerability of groundwater resources to pollution or to changes in groundwater recharge due to global climate change.

Reference and Links

BGR/UNESCO. 2018. Groundwater Resources Map of Africa. BGR Hannover / UNESCO Paris.

An image of the 2018 edition of the printed map, with marginalia, is available to view at WHYMAP.

An image of the 2008 edition of the printed map is available to view at WHYMAP.

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