Groundwater exploration in the Wilgerivier Formation

Abstract

To attain the above objectives, boreholes in a portion of the Wilgerivier Formation (Fig. 1), on 32 farms were investigated. Where reference Groundwater exploration in the Wilgerivier Formation PMPB Meulenbeld1 and PJ Hattingh2* 1 PO Box 1675, Bronkhorstspruit 1020, South Africa 2 Department of Geology, University of Pretoria, Pretoria 0002, South Africa Abstract A number of existing boreholes with known characteristics were studied, to evaluate the effectiveness of different low-cost geophysical techniques in the Wilgerivier Formation of the Waterberg Group. Aquifer type was the most important parameter studied. The results indicate that weathered diabase sills in the sedimentary rocks of the Wilgerivier Formation at a given depth and with a given resistivity value yield the most favourable results in terms of water quantity. Geophysical techniques, which can be used in an effective manner to exploit such aquifers, are the Schlumberger depth sounding technique, the electromagnetic EM-34 profiling technique and the magnetic technique.

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