oa Civil Engineering = Siviele Ingenieurswese - Water systems analysis in South Africa



The erratic nature of South Africa's climate is well known but what is often not fully realized is that as river systems are developed the inconsistency of the remaining unutilized runoff is much higher than the base-flow. To utilize this water requires larger dams, longer carry-over periods with more evaporation losses and - most importantly - greater risks of shortages (see Fig 1). In addition, as basins become more developed and more dams are built, the interdependence of sources such as dams, groundwater basins and re-usable water increases greatly. In this context water quality is also of increasing importance.


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