Land use and land cover changes and Soil erosion in Yezat Watershed,North Western Ethiopia
作者机构：School of Earth SciencesAddis Ababa UniversityP.O.Box 1176Addis AbabaEthiopia International Crops Research Institute for the Semi-Arid Tropics(ICRISAT)P.O.Box 5689Addis AbabaEthiopia
出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)
年 卷 期：2017年第5卷第2期
页 面：85-94页
核心收录：
学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：International Crops Research Institute for the Semi-Arid Tropics School of Earth Sciences, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa
主 题：Biomass GIS NDVI Land-use and land-cover Remote sensing RUSLE
摘 要：Soil erosion affects land qualities and water *** problem is severe in Ethiopia due to its topographic *** present research was aimed to estimate spatiotemporal changes in land-use/land-cover pattern and soil erosion in the Yezat watershed in *** study was carried out by using landsat imageries of 2001,2010 and *** were classified into categories using supervised classification by maximum likelihood *** were also classified into different biomass levels by using Normalized Difference Vegetation Index(NDVI)*** Universal Soil Loss Equation modeling was applied in a GIS environment to quantify the potential soil erosion *** area under grassland,woodland and homesteads have increased by 610.69(4%),101.69(0.67%)and 126.6 ha(0.83%)during *** extent of cultivated land and shrub/bushland was reduced by 323.43(0.02%)and 515.44 ha(3.41%),respectively,during the same *** vegetation cover in the watershed decreased by 91% during 2001-2010,and increased by 88% during *** of NDVI values indicates better ground cover due to implementation of integrated watershed development program in the *** estimated annual soil losses were 7.2 t ha^(-1) yr^(-1) in 2001,7.7t ha^(-1) yr^(-1) in 2010 and 4.8t ha^(-1) yr^(-1) in *** interventions are necessary to improve the status and utilization of watershed resources in response to sustainable land management practices for sustainable livelihood of the local people.
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