水土保持研究2024，Vol.31Issue(3)：20-29,10.DOI:10.13869/j.cnki.rswc.2024.03.042
基于RUSLE模型的雅鲁藏布江流域土壤侵蚀评价
Evaluation on Soil Erosion Based on RUSLE Model in the Yarlung Zangbo River Basin
摘要
Abstract
[Objective]The spatial and temporal characteristics of soil erosion in the Yarlung Zangbo River basin were explored,and effects of climate and vegetation cover changes on soil erosion were analyzed,in order to provide theoretical support for soil erosion prevention,ecosystem protection,and development and utilization of water and soil resources in alpine regions.[Methods]Based on the Revised Universal Soil Loss Equation(RUSLE),the spatial and temporal change of soil erosion in the Yarlung Zangbo River basin from 1980 to 2017 was quantitatively evaluated.[Results]The soil erosion intensity in the the Yarlung Zangbo River basin showed an overall trend of first decreasing and then increasing from 1980 to 2017,the fluctuation of the multi-year average soil erosion modulus decreased from 1980 to 1999,while the annual average soil erosion modulus showed no significant increase trend from 2000 to 2017.The upper and middle areas of the basin had significant changes,while the erosion intensity in the lower areas increased first and then decreased.The annual average soil erosion modulus was significantly positively correlated with rainfall erosivity,with a Pearson correlation coefficient of 0.92,but not significantly correlated with NDVI.Among the different land use types,the most intense soil erosion occurred in unused land,followed by sparse grassland,which accounted for more than 54％of the total basin erosion due to its highest area ratio.[Conclusion]Rainfall is the main factor affecting the change of soil erosion intensity in the Yarlung Zangpo River basin,and the key areas for soil erosion prevention and control in the future should be the areas with relatively high rainfall in the lower reaches of eastern part of the basin,and focus on preventing soil erosion caused by extreme rainfall.关键词
土壤侵蚀/雅鲁藏布江流域/RUSLE/时空变化/气候变化Key words
Yarlung Zangbo River basin/soil erosion/RUSLE/spatial-temporal change/climate change分类
农业科技引用本文复制引用
兰泽凡,田小靖,牛祎凡,赵广举,普琼,拉巴仓决,左巴特..基于RUSLE模型的雅鲁藏布江流域土壤侵蚀评价[J].水土保持研究,2024,31(3):20-29,10.基金项目
中国科学院西部之光—西部交叉团队重点实验室专项(xbzg-zdsys-202009)和中国科学院A类战略性先导科技专项"泛第三极环境变化与绿色丝绸之路建设"(XD20040202) （xbzg-zdsys-202009）
