- Info
Metadata
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Archive
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Aquifer type and yield (Groundwater classification and borehole yield)
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Amalgamation of 1:500 000 Hydrogeological Map series, giving a country-wide extent of aquifer type (groundwater classification) and expected borehole yield. NGDB data used primarily.
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Electrical conductivity of groundwater
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Amalgamation of Hydrogeological Map series, giving an interpolated country-wide extent of the Electrical Conductivity of groundwater .
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Groundwater Vulnerability
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Groundwater vulnerability to contamination dateset produced using the DRASTIC method (which considers depth to groundwater, recharge, aquifer media, soil type, topography, impact of the vadose zone, and conductivity. This dataset can be used to give a broad indication of relative vulnerability to non-point source pollution.
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GRA2: Average Groundwater Exploitation Potential
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Groundwater Resource Assessment Phase 2, 2005. Average of Groundwater Exploitation Potential for wet and dry conditions. Units are m3/km2/a - grid with 1kmX1km cells
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GRA2: Groundwater Recharge (mm/a)
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Groundwater Resource Assessment Phase 2, 2005. Recharge depth (mm/a) 1x1km grid. Recharge figures are based on the chloride mass-balance method. It should be noted that the coverage of chloride measurements in rainfall in South Africa is incomplete, and that the method has inherent errors.
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GRA2: Utilisable Groundwater Exploitation Potential in dry conditions
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Groundwater Resource Assessment Phase 2, 2005. Groundwater available in dry conditions. Units are m3/km2/a - grid with 1kmX1km cells
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GRA2: Depth to groundwater (mamsl)
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Groundwater Resource Assessment Phase 2, 2005. 1x1km waterlevel grid (mamsl)
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GRA2: Depth to groundwater (mbgl)
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Groundwater Resource Assessment Phase 2, 2005. 1x1km waterlevel grid (mbgl)
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