基于GIS和RS的四川省彭州市土壤侵蚀敏感性评价  

Soil Erosion Sensitivity Evaluation on Pengzhou in Sichuan Province Based on RS and GIS

作　　者：陈学华[1,2] 周建中[2] 

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所,四川成都610041 [2]华中科技大学水电与数字化工程学院,湖北武汉430074

出　　处：《山地学报》2011年第6期707-712,共6页Mountain Research

基　　金：水利部公益性项目(2007SHZ1-34)~~

摘　　要：根据彭州市独特的自然地理特征,结合美国通用土壤流失方程(USLE),选择降雨侵蚀力(R)、土壤可蚀性(K)、坡度坡长(LS)和地表覆盖(C)4个自然因子作为彭州市土壤侵蚀敏感性评价的指标,在GIS和RS技术支持下,对彭州市土壤侵蚀敏感性并进行综合评价。结果表明:彭州市土壤侵蚀敏感性以不敏感(37.78%)、轻度敏感(19.22%)和极敏感(22.09%)为主,中度敏感(10.57%)和高度敏感(10.33%)比例相对较小;区域内土壤侵蚀敏感性的空间分布具有垂直地带性,其中最不敏感区主要分布在东南平原地区,极敏感区主要分布在北部坡度大于25°的亚高山、低山和深丘地区。研究结果将为区域内土壤侵蚀状况的宏观把握和水土保持政策的制定提供科学依据。Based on U.S.universal soil loss equation（USLE） and the unique combination of natural and geographical characteristics of Pengzhou,select four natural factors such as the rainfall erosion force（R）,soil texture（K）,slope length and grade（LS） and land cover（C） as indicators of Soil Erosion sensitive evaluation for Pengzhou.In support of remote sensing（RS） and geographical information system（GIS）,classify the soil erosion sensitivity into five levels： potential,slight,light,medial,heavy level and evaluate soil erosion sensitivity of Pengzhou comprehensively in this article.The results showed： Pengzhou soil erosion sensitivity is mainly potential erosion（37.78%）,slight sensitive erosion（19.22%） and heavy sensitive erosion（22.09%）.Light sensitivity erosion（10.57%） and heavy sensitivity erosion（10.33%） is relatively small.The spatial distribution of soil erosion sensitivity has a vertical feature,the least sensitive areas mainly in the southeastern plains,the very sensitive area mainly in sub-alpine,low mountains and deep mound area where located in the northern slope of greater than 25.The obtained area of the different soil erosion levels and the spatial distribution of soil erosion in this study will be provided to the Government with recommendations to control soil erosion,providing scientific basis for making soil and water conservation policy as a scientific basis.

关 键 词：USLE 敏感性评价 空间分布 土壤侵蚀 

分 类 号：S157[农业科学—土壤学]