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Average Groundwater Exploitation Potential

The map below shows the Average of Groundwater Exploitation Potential for wet and dry conditions displayed in m3/km2/a using a 1x1km grid*. 

Average groundwater exploitation potential in south africa

*Please note the GRA2 project was completed as part of a national planning requirement and the data must be used with this in mind. The quantification and mapping of groundwater is an inherently uncertain and low confidence task – thus an exact answer is never achievable. The data is not to be used for site specific information. The useful scale of the data is to the quaternary catchment level and should not be used in a more detailed scale than this. The GRA2 was a “best estimate” at the time of the project in 1995. The intention of the project was to develop a methodology and to release data sets thereby enabling continual improvement of the accuracy of the methodology and the data sets. The data is to be used bearing the above in mind.

Source: Department of Water and Sanitation. Average Groundwater Exploitation Potential [raster geospatial dataset] 2005. Available from the SASDI website.