oa Botswana Notes & Records - Past climates and present groundwater supplies in the Bechuanaland Protectorate

Volume 13, Issue 1
  • ISSN : 0525-5090



That past climatic events have great influence on present-day groundwater conditions, seems generally to be overlooked; yet in what may be called climatically sensitive areas, such as the Kalahari and its borderlands, they are particularly important. Indeed, my field studies have revealed that during the Pleistocene period, from which we have but recently emerged, there were very pronounced, long sustained and recurring climatic regimes of opposite phases (dry and wet) whose detrimental and beneficial influences are felt to this day. The evidence for this is very clear. It is not, then, possible to appreciate adequately our subterranean water problems, nor thoughtfully to understand the nature and distribution of our underground aqueous resources without some knowledge not only of the local geology, upon which depends the accumulation of what water there may be below the surface, but also of climates, past no less than present, which together determine the quantity and quality of our available supplies�

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