Impact of land use changes on catchment soil erosion and sediment yield in the northeastern China:A panel data model application

作     者：Haiyan Fang Haiyan Fang

作者机构：College of Resources and EnvironmentUniversity of Chinese Academy of Sciences Key Laboratory of Water Cycle and Related Land Surface ProcessesInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2020年第35卷第5期

页      面：540-549页

核心收录：

学科分类：082802[工学-农业水土工程] 0709[理学-地质学] 0819[工学-矿业工程] 0907[农学-林学] 08[工学] 09[农学] 090707[农学-水土保持与荒漠化防治] 0828[工学-农业工程] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 

基　　金：financially supported by projects of the National Natural Science Foundation of China (Grant Numbers 41977066 and 41571271) 

主　　题：WaTEM/SEDEM Soil erosion Sediment yield Landscape metrics Panel data model 

摘      要：Land use is an important factor influencing soil erosion and sediment yield(SESY).Regressing soil erosion intensity(SEI) and sediment yield(SY) to land use characteristics can provide necessary information for controlling soil ***,current simple regression methods emphasize cross sectional parameters,with less emphasis on temporal variability of relevant land use parameters so that the derived effects of land use change on SESY can be ***,a panel data method was applied to quantify the impact of land use change on SESY in 1954,1975,and 2015,based on the WaTEM/SEDEM model and seven landscape metrics for 25 reservoir catchments in northeastern *** results indicate that SEI and area-specific SY(SSY) continuously decreased from 1954 to 2015,which were significantly correlated with landscape metrics such as area-edge metrics of mean patch area(AREAN),shape index of the mean related circumscribing circle(CIRCLEN),aggregation index of effective mesh size(MESH),patch cohesion index(COHESION),and diversity metrics such as Shannon’s diversity index(SHDI),patch richness density(PRD),and modified Simpson’s evenness index(MSIEI).The results suggested that catchment SESY can be reduced through decreasing mean patch area,patch mesh size,and physical connectivity of patches,enriching landscape types,and elongating land use *** findings are helpful to effectively implement soil conservation measures in northeastern China and similar regions *** current study also implies that the panel data approach will have beneficial potential applications in earth-science research fields.