oa Civil Engineer in South Africa - The Pongolo Floodplain : prepared discussion

Volume 22, Issue 5
  • ISSN : 0009-7845



What can we learn from the ecological disturbances which have been caused by man in river systems? The first is that the damages or the effects of such disturbances may only become evident or serious after 10, 20 or even 30 years. The second is that secondary effects which could hardly have been foreseen sometimes play a major role in the damages that do occur.

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