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There are scientific methods that can, with correct application, increase the chances for successfully locating borehole sites. The following factors are taken into consideration in ground water exploration.
- Firstly we look at the geological setting of the area i.e.. the types of geological formations present in the area;
- Secondly we look at the hydrological factors such as rainfall and the percentage that contributes to groundwater recharge, as well as the water balance for a specific catchment area.
Typical questions that are asked in groundwater investigation are: how much do we need? Can the aquifers provide this need? Is the ground water quality suitable for the intended use? Etc. To answer such questions it is necessary to study available information such as geological and hydrological maps, aerial photographs, satellite images, borehole information, such as borehole depths, yields, depths at which water was intersected, water quality intersected, of all, or as many as possible of the boreholes in the area. The essence of these techniques is based on the understanding of the geological sequences present in the area, and none of these techniques can be used in isolation.
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