Abstract

ABSTRACTThe Sabi Valley alluvial plain is the largest tract of alluvium in Zimbabwe. The ground‐water hydrology of the alluvial plain was studied by three independent methods: the classical approach of potentiometric surface construction and pump test analyses, the use of in‐borehole velocity and direction measurements with artificial radioactive isotopes applied to the point‐dilution techniques, and a natural and thermonuclear tritium survey.The three methods of approach produce remarkably close values for the ground‐water throughflow within the plain. A safe yield figure of 2.5 cubic metres/sec is currently used with confidence for the ground‐water reservoir as a result of this study.

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