Title

Groundwater productivity in Africa

+ The original author did not specify a license.

Abstract

This 5 km resolution grid indicates what borehole yields (in l/s) can reasonably be expected in different hydrogeological units. The ranges indicate the approximate interquartile range of the yield of boreholes that have been sited and drilled using appropriate techniques. Groundwater productivity is given in liters per second.

Detailed description of the methodology, and a full list of data sources used to develop the layer can be found in the peer-reviewed paper
available here: http://iopscience.iop.org/article/10.1088/1748-9326/7/2/024009/pdf

The raster and a high resolution PDF file are available for download on the website of British Geological Survey (BGS): http://www.bgs.ac.uk/research/groundwater/international/africanGroundwater/mapsDownload.html

Pubblication Date

July 19, 2017, 1:52 p.m.

Type

Raster Data

Keywords

Groundwater , Supply

Category

Groundwater

Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations. It represents 98% of the world’s unfrozen freshwater.

Regions

Global , Africa

Responsible

gabin.archambault

Group

Theme 2: Groundwater

Restrictions

UNESCO-IHP was given the authorization to display on IHP-WINS some materials produced by the British Geological Survey. Permit Number CP17/019 British Geological Survey © NERC 2017. All rights reserved.

Edition

MacDonald, A M, Bonsor, H C, Ó Dochartaigh, B E, Taylor, R G. (2012). Quantitative maps of groundwater resources in Africa. Environmental Research Letters 7, 024009

Language

English

Temporal Extent

Dec. 31, 2009, 11 p.m. - Dec. 31, 2010, midnight

Supplemental Information

This layer is part of a series of quantitative maps produced by the BGS. They are the first quantitative maps 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).

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