oa Civil Engineering = Siviele Ingenieurswese - Surface water resources of South Africa - the 1981 appraisal
Nearly all of South Africa's water requirements are drawn from surface resources. It is generally accepted that demand will exceed the exploitable resources within the next 40 years. A reliable means of evaluating surface water resources is therefore essential to planners, designers and managers of water supply schemes. The paper discussed the problems involved in a country-wide appraisal of surface water resources, with reference to a recenlly undertaken survey of South Africa. The paper descriptionbed how spatial and temporal extrapolation of stream flow observations was accomplished with the aid of a deterministic rainfall-runoff model which lakes into account land use changes. Also descriptionbed were the techniques employed for statistical analysis of low records to provide information for determination of storage yield at virtually any locality in the country. Some results of the new wafer resources survey were presented.
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