oa East African Geographical Review - Hydrology and afforestation in the Aberdares
Water is a vital natural resource in East Africa, whether in the form of rain, surface or ground water. The seasonal amount of rain is often the limiting factor in agricultural production and the presence or absence of surface water in many cases determines the extent of human habitation. Even in areas where rainfall is adequate for settled agriculture, perennial surface water supplies are essential for domestic and stock requirements. Where irrigation schemes are in operation or planned, their success depends on a particular minimum flow of water in the river. The areas in East Africa that give rise to perennial streams are very limited in extent and the judicious management of the land in these areas is of paramount importance in maintaining surface water resources.
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