川东平行岭谷区土壤侵蚀脆弱性评价与地形相关性分析  

Soil Erosion Vulnerability Evaluation and Topographic Correlation Analysis in Paralleled Ridge-valley of East Sichuan

作　　者：孙小涛[1,2] 石宁卓 屈会 彭洪斌[1,2] SUN Xiaotao;SHI Ningzhuo;QU Hui;PENG Hongbin(School of Ecological Tourism,Sichuan University of Arts and Science,Dazhou 635000,China;School of Architectural Engineering,Sichuan University of Arts and Science,Dazhou 635000,China;School of Logistics and Management Engineering,Yunnan University of Finance and Economics,Kunming 650221,China)

机构地区：[1]四川文理学院生态旅游学院,四川达州635000 [2]四川文理学院建筑工程学院,四川达州635000 [3]云南财经大学物流与管理工程学院,云南昆明650221

出　　处：《地理空间信息》2024年第12期87-91,共5页Geospatial Information

基　　金：国家自然科学基金资助项目(41761104);四川省社会科学重点研究基地四川县域经济发展研究中心课题资助项目(xy2022068);四川省哲学社会科学重点研究基地四川革命老区发展研究中心课题资助项目(SLQ2022SB-08)。

摘　　要：为了评价土壤侵蚀脆弱性,揭示其与地形的相关性。以大竹县为研究区,运用RS与GIS技术,选取植被覆盖度、土地利用、高程、坡度、坡向、地形起伏度等指标因子,运用ArcMap 10.8空间分析,评价土壤侵蚀脆弱性及与地形的相关性。结果表明:①土壤侵蚀以微度、轻度为主,微度、轻度、中度、强烈、极强烈、剧烈等级分别为1268.27、367.64、326.56、106.12、9.51、0.9 km^(2),占国土面积分别为61.00%、17.68%、15.71%、5.10%、0.46%、0.05%;②强烈等级以上区域集中在RDLS 0.05~0.15,0.15~0.25;③强烈等级以上区域集中坡度15°~25°、25°~35°、>35°,占土壤侵蚀面积分别为12.95%、1.28%、0.14%;④坡向范围土壤侵蚀半阳坡>阳坡>阴坡>半阴坡>平地;⑤高程范围土壤侵蚀300~600 m>600~900 m>900~1200 m>0~300 m;研究对长江上游生态环境建设有重要的意义。In order to evaluate the soil erosion vulnerability and reveal its correlation with topography,taking Dazhu County as the study area,taking vegetation cover,land-use,elevation,slope,slope direction,and terrain undulation as the index factors,we used RS,GIS technologies and ArcMap 10.8 spatial analysis to evaluate the soil erosion vulnerability and its correlation with topography.The results show that①soil erosion is predominantly slight and mild,with grades of slight,mild,moderate,intense,very intense,and intense being 1268.27 km^(2),367.64 km^(2),326.56 km^(2),106.12 km^(2),9.51 km^(2)and 0.9 km^(2),accounting for 61.00%,17.68%,15.71%,5.10%,0.46%and 0.05%of the country’s land area,respectively.②The areas above the strong grade are concentrated in RDLS 0.05~0.15 and 0.15~0.25.③The areas above the strong grade are concentrated in slopes of 15°~25°,25°~35°,and>35°,accounting for 12.95%,1.28%,and 0.14%of the soil erosion area,respectively.④Slope range soil erosion semi-sunny slopes>sunny slopes>shady slopes>semi-shady slopes>flat land.⑤Elevation range soil erosion 300~600 m>600~900 m>900~1200 m>0~300 m.The study is of great significance to the ecological environment construction in the upper reaches of the Yangtze River.

关 键 词：土壤侵蚀 地形 RS GIS 大竹县 

分 类 号：P208[天文地球—地图制图学与地理信息工程]