Melese Tadele, Senamaw Abebe, Belay Tatek, Bayable Getachew
Department of Natural Resource Management College of Agriculture and Environmental Sciences Bahir Dar University P.O. Box 5501 Bahir Dar Ethiopia.
Department of Geography and Environmental Studies College of Social Science Debre Tabor University P.O. Box 273, Debre Tabor Ethiopia.
Glob Chall. 2021 May 7;5(7):2000109. doi: 10.1002/gch2.202000109. eCollection 2021 Jul.
The Blue Nile basin is one of the hot-spots of soil erosion areas in Ethiopia. However, the impact of land use changes on soil erosion is poorly understood in the Tagaw watershed. Hence, the objective of the study is to assess the impact of land use changes on soil erosion in Tagaw watershed over the last 31 years. Rainfall, soil, satellite images and topographic data are acquired from field survey and secondary sources. A Revised Universal Soil Loss Equation (RUSLE) model is used to estimate soil erosion. The mean annual and total potential soil losses of the watershed are 19.3, 22.9, 26 and 0.06-503.56, 0.11-516.67, and 0.00-543.5 tons ha yr for 1995, 2006 and 2016 respectively. The highest soil loss is found for bare land. The RUSLE model further showed that the highest soil erosion occurred in 2016 whereas the lowest soil erosion occurred in 1995.
青尼罗河流域是埃塞俄比亚土壤侵蚀地区的热点之一。然而，在塔加沃流域，土地利用变化对土壤侵蚀的影响却鲜为人知。因此，本研究的目的是评估过去31年里土地利用变化对塔加沃流域土壤侵蚀的影响。降雨、土壤、卫星图像和地形数据均来自实地调查和二手资料。采用修订后的通用土壤流失方程（RUSLE）模型来估算土壤侵蚀。该流域1995年、2006年和2016年的年均潜在土壤流失量和总潜在土壤流失量分别为19.3、22.9、26以及0.06 - 503.56、0.11 - 516.67和0.00 - 543.5吨/公顷·年。裸地的土壤流失量最高。RUSLE模型进一步表明，2016年的土壤侵蚀最为严重，而1995年的土壤侵蚀最少。
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