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Estimation of the spatial distribution of soil erosion in the hilly area of Sichuan, China
Jin, Xiaoli1,2; Cheng, Genwei1; Xu, C.-Y.3; Fan, Jihui1; Ma, Zelong2
Source PublicationErosion and sediment yields in the changing environment (IAHS Publ. 356)
Author of SourceIAHS
meetingIAHS international commission on continental erosion symposium
Conference DateOctober 11, 2012 - October 15, 2012
Conference PlaceChengdu
Contribution Rank1
AbstractThe hilly area of Sichuan (China) has suffered from soil erosion as a result of the intensive agriculture and steep topography. Many different methods have been used for the estimation of soil erosion and no clear consensus about erosion rates and subsequent sediment delivery ratios (SDR) has been reached. In this study, the Universal Soil Loss Equation (USLE) with different parameter estimation methods was applied to two river basins (i.e. Weichenghe (WCH) and Lizixi (LZX)) with the help of G1S techniques. The results were compared with those of previous studies based on remote sensing, erosion plots or the137Cs technique. The main results can be summarized as: (1) different rainfall erosivity estimation methods generate vastly different results; (2) using two-dimensional slope length produces higher soil erosion rate estimates and lower SDRs than the conventional approach in USLE; (3) the average annual soil erosion rates for WCH and LZX were estimated at 706 t km-2year-1and 3040 t km-2year-1, respectively, and the corresponding sediment delivery ratios at 0.27 and 0.38; and (4) the high erosion rates reflect the high altitude and intensive agricultural land use. Copyright © 2012 IAHS Press.
KeywordUSLE rainfall erosivity soil erosion rate spatial distribution
Indexed ByEI
Accession numberAccession number:20133616706428
Document Type会议论文
Corresponding AuthorJin, Xiaoli
Affiliation1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China;
2.Sichuan Hydraulic Science Research Institute, Chengdu 610072, China;
3.Department of Geosciences, University of Oslo, Norway
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Jin, Xiaoli,Cheng, Genwei,Xu, C.-Y.,et al. Estimation of the spatial distribution of soil erosion in the hilly area of Sichuan, China[C]//IAHS,2024:228-234.
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