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A review of some unique aspects of the limnology of shallow Southern African man-made lakes

  • Shallow Lakes Environment
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Abstract

Large numbers of man-made lakes occur throughout S Africa. Although primarily designed for specific water supply purposes, most of these lakes fulfill a multipurpose role. The need for such large numbers of reservoirs is related to vagaries in rainfall and runoff; these uncertainties have led to the development of a philosophy of conserving water quantity, which has created some unusual limnological conditions. Examination of the hydrography and limnology of 64 S African impoundments reveals that both basin morphometry and water retention times are affected by natural (drought/flood) and artificial (drawdown) factors which, in turn, affect the hydrodynamics of the lakes, whilst the introduction of treated effluents as a water conservation measure gives rise to a large percentage of enriched lakes having extremely high productivity.

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    Thornton J. A. Dr.

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Thornton, J.A. A review of some unique aspects of the limnology of shallow Southern African man-made lakes. GeoJournal 14, 339–352 (1987). https://doi.org/10.1007/BF00208207

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