摘要
Few studies have categorically analyzed the factors governing soil erosion spatial layout formation and changes within it from a static or dynamic perspective.In this study,we explored the factors influencing soil erosion changes in Liangshan Prefecture,Sichuan Province.The Revised Universal Soil Loss Equation model was used to calculate and grade the soil erosion modulus in the study area from 1990 to 2023 and analyze its spatiotemporal variations.Geographical detectors were introduced to determine the factors influencing erosion layout,inception,and development.From 1990 to 2023,soil erosion in Liangshan Prefecture was moderately low.Areas with high soil erosion grades were mainly distributed in the Niri,Meigu,and Zhaojue river basins,characterized by low vegetation coverage and high topographic fluctuation,and along the Jinsha River,which is greatly affected by industrial development.Land use type was the most critical factor affecting the spatial layout of the soil erosion intensity.Precipitation(55.28%)was the dominant factor governing the change in soil erosion intensity distribution.This study revealed the dynamic changes and driving factors of soil erosion in the past 30 years in Liangshan and suggests erosion prevention measures that can be used for regional soil erosion control.
关于影响土壤侵蚀空间布局形成及变化的因素,从静态或动态角度进行的系统分析研究较少。本研究探讨了四川省凉山州土壤侵蚀变化的影响因素。采用修订的通用土壤流失方程模型,计算研究区1990年至2023年的土壤侵蚀模数后进行了分级,并分析其时空变化。引入地理探测器以确定影响侵蚀布局、发生和发展的因素。从1990年到2023年,凉山州的土壤侵蚀程度为中等偏低。土壤侵蚀等级较高的地区主要分布在倪日、眉谷和昭觉流域,这些地区植被覆盖率低,地形起伏大,同时金沙江沿岸也受到工业发展的显著影响。土地利用类型是影响土壤侵蚀强度空间布局的最关键因素。降水(占55.28%)是主导土壤侵蚀强度分布变化的因素。本研究揭示了过去30年凉山土壤侵蚀的动态变化及驱动因素,并提出了可用于区域土壤侵蚀控制的防治措施。
作者
BAI Lin
YAO Kun
YANG Weishi
DU Chenling
白琳;姚昆;杨微石;杜陈龄(西昌学院资源与环境学院,四川西昌615000;四川师范大学西南土地资源评价与监测教育部重点实验室,成都610068;北京大学深圳研究生院城市规划与设计学院城市人居环境科学与技术重点实验室,广东深圳518055;深圳市自然资源和不动产评估发展研究中心,广东深圳518040)
基金
The Key Laboratory of Southwest Land Resources Evaluation and Monitoring of the Ministry of Education(TDSYS202109)
The Liangshan Prefecture Academic and Technical Leader Training Project(ZRS202001)
The Xichang University“Two High”Talent Research Support Program(YBZ202108)
The Tuojiang River Basin High Quality Development Research Center Project(TJGZL2020-06)
The National College Student Innovation and Entrepreneurship Training Project(202110628028)。
