基于GIS与RUSLE模型岔口小流域土壤侵蚀定量研究  

Quantitative Study on the Soil Erosion of Chakou Small Watershed with the GIS Technology and RUSLE Model

作　　者：李欣欣[1] 郭青霞[1] 杨鑫芳[1] 李晋超[1] 闫瑞[1] 闫胜军[1] 赵富才[1] 卢庆民 

机构地区：[1]山西农业大学资源环境学院,山西太谷030801 [2]永和县水务局,山西永和041400

出　　处：《山西农业大学学报（自然科学版）》2013年第5期413-419,共7页Journal of Shanxi Agricultural University(Natural Science Edition)

基　　金：国家自然科学基金(41071345)

摘　　要：在RUSLE模型理论支持下,以山西省永和县岔口小流域为研究对象,分析野外实地调查及观测数据,在ArcGIS软件环境下建立土壤侵蚀定量计算模型,生成小流域土壤侵蚀分布图,并分析土壤侵蚀空间分布特点。结果表明,流域主要以微度侵蚀为主,占流域总面积的98.52%;流域最高侵蚀模数为4377.82t·km-2·a-1,未达到强度侵蚀分级;流域内土壤侵蚀强度较大的区域集中于坡度大于8°的荒坡及无植被覆盖的居民点用地等。通过定量计算不同土地利用类型的土壤侵蚀模数及土壤侵蚀分级,为流域侵蚀防治及水土保持规划提供一定的数据参考。Supporting by the theory of RUSLE model,aquantitative calculation model about soil erosion was established based on the field investigation and observation data analysis results with ArcGIS software in Chakou small watershed of Yonghe County,Shanxi Province.The distribution map of soil erosion spots in Chakou small watershed was produced based on the created model and the spatial distribution characteristics of soil erosion were analyzed.The results showed that the area with minor erosion accounted for 98.52%of the total area of the watershed,and the highest erosion modulus was 4377.82t·km-2·a-1,which didn't reach the serious erosion classification.The relative large eroded area was mainly located in barren hillsides with slope greater than eight degrees and in villages with poor vegetation cover.By quantitatively calculating the soil erosion modulus and classifying the soil erosion both based on different land use types,the research results could provide references for soil and water conservation planning in the small watershed.

关 键 词：GIS RUSLE模型 岔口小流域 土壤侵蚀 定量研究 

分 类 号：S157.1[农业科学—土壤学]