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首页> 外文期刊>International Journal of Agricultural Research, Innovation and Technology >Soil loss estimation using geographic information system in enfraz watershed for soil conservation planning in highlands of Ethiopia
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Soil loss estimation using geographic information system in enfraz watershed for soil conservation planning in highlands of Ethiopia

机译:基于地理信息系统的蚕豆流域水土流失估算,用于埃塞俄比亚高地的水土保持规划

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Accelerated soil erosion is a worldwide problem because of its economic and environmental impacts. Enfraz watershed is one of the most erosion-prone watersheds in the highlands of Ethiopia, which received little attention. This study was, therefore, carried out to spatially predict the soil loss rate of the watershed with a Geographic Information System (GIS) and Remote Sensing (RS). Revised Universal Soil Loss Equation (RUSLE) adapted to Ethiopian conditions was used to estimate potential soil losses by utilizing information on rainfall erosivity (R) using interpolation of rainfall data, soil erodibility (K) using soil map, vegetation cover (C) using satellite images, topography (LS) using Digital Elevation Model (DEM) and conservation practices (P ) using satellite images. Based on the analysis, about 92.31% (5914.34 ha) of the watershed was categorized none to slight class which under soil loss tolerance (SLT) values ranging from 5 to 11 tons ha -1 year -1 . The remaining 7.68% (492.21 ha) of land was classified under moderate to high class about several times the maximum tolerable soil loss. The total and an average amount of soil loss estimated by RUSLE from the watershed was 30,836.41 ton year -1 and 4.81 tons ha -1 year -1 , respectively. Int. J. Agril. Res. Innov. & Tech. 5 (2): 21-30, December, 2015
机译:由于其对经济和环境的影响,加速的土壤侵蚀是世界性的问题。 Enfraz分水岭是埃塞俄比亚高地最易受侵蚀的分水岭之一,受到关注的很少。因此,进行这项研究是为了利用地理信息系统(GIS)和遥感(RS)在空间上预测流域的土壤流失率。使用经过修订的适用于埃塞俄比亚条件的通用土壤流失方程(RUSLE),通过利用降雨数据的插值法获得降雨侵蚀力(R),使用土壤图的土壤易蚀性(K),使用卫星的植被覆盖率(C)来估算潜在的土壤流失影像,使用数字高程模型(DEM)的地形(LS)和使用卫星影像的保护措施(P)。根据分析,在土壤流失耐受性(SLT)值范围为5到11吨公顷-1年-1的情况下,约92.31%(5914.34公顷)的流域没有分类为轻微分类。其余7.68%(492.21公顷)的土地被划为中度至高级等级,约为最大可容忍水土流失的几倍。通过RUSLE估算,从该流域的总土壤流失量为30,836.41吨-1年和4.81吨ha -1 -1年。诠释J.阿格里尔。 Res。创新和技术。 5(2):2015年12月21日至30日

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