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Quantifying the impacts of spatiotemporal land use and land cover changes on soil loss across agroecologies and slope categories using GIS and RUSLE model in Zoa watershed,southwest Ethiopia

引用

Ecological Processes 2023年第1期12卷 344-364页

作者： Ginjo Gitima menberu teshome Meseret Kassie Monika Jakubus Department of Geography and Environmental Studies University of GondarP.O.Box 196GondarEthiopia Department of Geography and Environmental Studies Debre Tabor UniversityP.O.Box 272Debre TaborEthiopia Department of Soil Science and Microbiology Poznan University of Life SciencesUl.Szydłowska 5060-656 PoznanPoland

Background Soil erosion in Ethiopian highlands is highly consistent with land use/land cover(LULC)changes that are associated with deforestation and a decline in ***,identifying soil erosion-prone areas and quantifying soil loss in rugged terrains and various agroecologies due to LULC changes have not been dedicated to scientific ***,we quantified the impacts of spatiotemporal LULC changes on soil loss across agroecologies and slope categories using GIS and RUSLE model from 1985 to 2021 in Zoa watershed,southwest ***,prioritizing erosion severity risks at sub-watersheds and quantifying temporal sediment yield is essential for better conservation *** images,rainfall,Digital Elevation Model,and soil data were obtained from field observations and secondary *** Bareland and farmland have been expanding at the expense of other land use *** annual soil loss in the watershed ranged from 0 to 113.21 t ha^(-1) year^(-1),0 to 163.16 t ha^(-1) year^(-1),and 0 to 194.58 t ha^(-1) year^(-1)with a mean annual soil loss of 21.07,29.35 and 40.93 t ha^(-1) year^(-1) in 1985,2000,and 2021,*** LULC classes,the highest soil loss was generated from bareland(31.73 t ha^(-1) year^(-1))and farmland(27.08 t ha^(-1) year^(-1))in 1985 later upsurged to 35.52 t ha^(-1) year^(-1)and 59.91 t ha^(-1) year^(-1) in 2021,respectively,due to the maximum susceptibility of soil erosion risks from unprotected *** results also revealed that the lowland agroecology generated the highest mean soil loss of 24.05 t ha^(-1) year^(-1)in 1985,39.74 t ha^(-1) year^(-1) in 2000,and increased to 57.55 t ha^(-1) year^(-1)in *** the slope categories,the highest and most excruciating soil loss was engendered from steep(35.55–60.78 t ha–1 year–1)and very steep(52.48–72.69 t ha^(-1) year^(-1))slope terrains during 1985–*** northwestern part of the watershed is the most erosion-prone area which is now ex

关键词： Soil erosion RUSLE Land use/land cover Slope gradient Tolerable soil loss Soil conservation

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