滇中地区土壤侵蚀时空变化及多尺度驱动因子
Spatiotemporal variation of soil erosion and multi-scale driving factors in central Yunnan region
摘要
Abstract
[Objective]As a critical ecological barrier in the upper reaches of the Yangtze River,the central Yunnan region faces prominent soil erosion issues.Investigating the multi-spatiotemporal evolution patterns and multi-scale driving factors in this region is of great significance for guiding subsequent soil erosion control and sustainable ecological restoration.[Methods]Based on the RUSLE model and GIS/RS technology,this study quantitatively inverted the spatiotemporal dynamics of soil erosion in central Yunnan region from 1990 to 2022.The geodetector method was employed to systematically analyze the driving factors of natural and anthropogenic effects on soil erosion at two scales:the regional scale and the sub-basin scale.[Results]1)Soil erosion in central Yunnan region was dominated by slight and light levels.Spatially,it showed a distribution pattern of"strong erosion in the northeast and river valleys,and weak erosion in the northwest."Temporally,it exhibited a trend of"overall contraction with intensified extreme erosion."2)At the regional scale,fractional vegetation cover(-q=0.290)and land use type(-q=0.156)had the highest explanatory power,and fractional vegetation cover combined with slope constituted the dominant driving combination(-q=0.557).At the sub-basin scale,the interaction effects of fractional vegetation cover and slope(-q=0.603)and land use type(-q=0.517)increased significantly,and the impact of human activities strengthened as the scale decreased.High-risk areas were mainly distributed in grassland regions with elevations of 1 000-2 000 m,slopes> 35°,moderately weathered strata,and fractional vegetation cover of 10%-30%.[Conclusions]The findings reveal the scale dependency and heterogeneity of driving factors of soil erosion in central Yunnan region,which can provide a scientific basis for differentiated and precise soil and water conservation measures.关键词
土壤侵蚀/RUSLE模型/地理探测器/驱动因子/滇中地区Key words
soil erosion/RUSLE model/geodetector/driving factors/central Yunnan region分类
农业科技引用本文复制引用
栗倩倩,时雨,范佳帅,杨万涛,和成忠,马一奇,李怡颖,涂春霖,陈庆松..滇中地区土壤侵蚀时空变化及多尺度驱动因子[J].中国水土保持科学,2026,24(3):112-124,13.基金项目
自然资源综合调查指挥中心科技创新课题"金沙江中游喀斯特区关键带土壤养分供给与碳汇功能协同提升机制及技术"(KC20240021) （KC20240021）
中国地质调查局项目"川滇生态屏障重点地区生态修复综合调查"(DD20230098),"滇中地区水资源与水生态修复支撑调查"(DD20230701403),"滇西北程海流域及周边地区自然生态调查"(DD202607102202) Innovation Project of the Natural Resources Comprehensive Survey Command Center"Synergistic Enhancement Mechanism and Technology for Soil Nutrient Supply and Carbon Sink Function in the Critical Zone of the Middle Jinsha River Karst Region"(KC20240021).China Geological Survey Projects"Comprehensive Survey of Ecological Restoration in Key Areas of the Sichuan-Yunnan Ecological Barrier"(DD20230098),"Support Survey for Water Resources and Water Ecological Restoration in Central Yunnan"(DD20230701403),"Survey of the Natural Ecology in the Chenghai Lake Basin and Surrounding Areas of Northwestern Yunnan"(DD202607102202) （DD20230098）
