泥沙研究2023，Vol.48Issue(6)：51-58,66,9.DOI:10.16239/j.cnki.0468-155x.2023.06.008
西南高山峡谷区土壤侵蚀空间分异特征
Spatial variation of soil erosion in Southwest Alpine Canyon Area
摘要
Abstract
The distribution characteristics of hydraulic and freeze-thaw erosion intensity under different topographic,geological conditions and land use types in the southwest alpine canyon area of China were studied by the Chinese Soil Loss Equation and the freeze-thaw erosion intensity evaluation model,and the spatial differentiation patterns were revealed.The results showed that:The soil erosion in the southwest alpine canyon area is mainly dominated by hydraulic erosion,accompanied by freeze-thaw erosion.Soil erosion generally shows a spatial distribution pattern of great amount and severe level in the east,low amount and week level in the west,and hydraulic erosion in the south and freeze-thaw erosion in the north.The mild or above soil erosion is mainly distributed in the alpine zone with an altitude of 3 500 m or above and the steep area with slope of 15° or above,but the intensive and extremely intensive hydraulic erosion is the mostly distributed in the mid-mountain zone of 2 000-3 500 m,while freeze-thaw erosion is almost entirely distributed in the alpine zone.The karst geology accounts for 35.48％of the total area,and there is 21.74％of the soil erosion here exceeds the mild level,which is 10.27％higher than that in the non-karst area.Grassland and forest account for 90.47％of the total area,and 41.47％of soil erosion that exceeds the mild level is distributed in this area.The cultivated land only accounts for 2.12％in the region,while 31.54％of the soil erosion exceeds mild level.关键词
土壤侵蚀/水力侵蚀/冻融侵蚀/空间分布/侵蚀强度/西南高山峡谷区Key words
soil erosion/hydraulic erosion/freeze-thaw erosion/spatial distribution/erosion intensity/the southwest alpine canyon area分类
农业科技引用本文复制引用
丁琳,黄婷婷,秦伟,周金星..西南高山峡谷区土壤侵蚀空间分异特征[J].泥沙研究,2023,48(6):51-58,66,9.基金项目
国家重点研发计划项目(2022YFF1302902) （2022YFF1302902）
