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Deposition of eroded soil on terraced croplands in Minchet catchment,ethiopian highlands

International Soil and Water Conservation Research 2017年第3期5卷 212-220页

作者： Alemtsehay Subhatu Tatenda Lemann Kaspar Hurni Brigitte Portner Tibebu Kassawmar Gete Zeleke Hans Hurni Centre for Development and Environment University of BernHallerstrasse 103012 BernSwitzerland Institute of Geography University of BernHallerstrasse 123012 BernSwitzerland Water and Land Resource Centre Diaspora SquareMegenagnaPO Box 3880Addis AbebaEthiopia

In the ethiopian highlands,soil and water conservation practices are of utmost importance to conserve eroded soil and combat soil *** study provides detailed results on on-site sediment deposition and net soil loss in terraced croplands in a catchment in the sub-humid ethiopian *** deposition was measured on horse bean and maize fields during the crop growing seasons of 2014 and *** took place on observation plots on terraced cropland with varying spacing between terraces and varying slope *** soil loss,in this case the amount leaving the terraced cropland,was calculated by modelling the Universal Soil Loss Equation(USLE)for the whole observation field and subtracting the measured sediment *** study result showed about 8–11 t ha^(−1) sediment was deposited in the deposition zone of the terraced cropland,with greater sediment deposition on terraces with narrow spacing and steeper slope *** deposition was highest in July and August,and relatively low in *** soil loss ranged from 32 to 37 t ha^(−1) in the terraced cropland of the study *** the total soil loss in the crop growing season,about 54–74%sediment was deposited on the deposition zone of terraced crop *** of soil and water conservation with narrow spacing,especially on the steep slopes of the sub-humid ethiopian highlands or other similar area,are thus highly recommended as they enable conservation of the eroded soil in the cropland.

关键词： Sediment Deposition Soil Loss Soil and Water Conservation ethiopian highlands

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