Physiography and Soil Types in the High Rainfall Region of Kenya and Their Hydrological Significance

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Nyandat N.N
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The importance of agriculture in Kenya. Is well known, since the country derives much of its revenue from the expert of agricultural Produce. However, as more land comes under cult1vation, resources both of soil and water become threatened, since land clearance Exposes the soil to heavy rain and the consequent dangers of erosion and flash flooding. Many investigators, notably Wischrneier et al. (1971); Hudson and Jackson (1959); Hutchin son et al. (1958); and Ransburg (1955), have found that the extent to which soil and water Regime of an environment is affected by a given land use will depend on the complex Interactions of climate (particularly rainfall intensity and amount), type of soil, length and degree of slope and ground cover. Experimental results generally show that most of the sediment loads of rivers in areas that are primary agricultural and have more than 500 mm of annual precipitation, derive from sheet erosion. Catchment experiments may therefore be helpful in evaluating, the extent 1:0 which soil and water regimes of an environment may be altered by a land-use change.
East African Agricultural And Forestry Journal, 43 (Special Issue), p. 256-260