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Stone Cover Effects On Soil Erosion Hazard: A Case Study Of The Upper Ewaso Ng'iro Basin


BM Mati

Abstract

The influence of stone and rock covers on soil erosion hazard was assessed in the Upper Ewaso Ng'iro North basin of Kenya. Reconnaissance data from 83 sample sites was collected on vegetation cover types and amounts, slope gradients, soil types and percentage stone and rock cover over the area. In addition, topsoil samples were collected for laboratory analysis of texture and organic matter. It was found that although the main factors influencing soil erosion were vegetation cover and topography, stone and rock covers increased soil erosion under each type of vegetation. In addition, stone/rock covers influenced soil erosion on-site and off-site of the affected areas. However, more detailed studies are necessary to determine the processes involved during soil erosion under stone covers, particularly under rangeland conditions.Keywords: stone cover, soil erosion

JAGST Vol 6 (1) 2004: 19-28

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eISSN: 1561-7645