基于数量化理论Ⅱ的鄂西北山区坡面土壤侵蚀强度评价——以郧西县为例  

ASSESSMENT FOR SOIL EROSION OF SLOPE RUNOFF PLOTS BASED ON QUANTITATIVE THEORY Ⅱ IN NORTH-WEST OF HUBEI PROVINCE

作　　者：廖炜[1,2] 孙燕[3] 张秋文[3] 龚兰兰[3] 

机构地区：[1]华中师范大学城市与环境科学学院,湖北武汉430079 [2]湖北省水土保持监测中心,湖北武汉430070 [3]华中科技大学数字流域科学与技术湖北省重点实验室,湖北武汉430074

出　　处：《长江流域资源与环境》2011年第4期482-488,共7页Resources and Environment in the Yangtze Basin

基　　金：湖北省水利厅丹江库区数据录入与分析方法研究项目;国家自然科学基金(4100123640971208)

摘　　要：水土流失既是资源问题,又是生态环境问题。土壤侵蚀对人类生存和发展构成了严重威胁,成为制约可持续发展的障碍因素。以鄂西北丹江口库区郧西县坡面径流小区为试验点,通过分析小区的实地观测数据,建立坡面土壤侵蚀定性评价指标体系,并将数量化理论II作为有效的数学方法,建立郧西县坡面径流小区土壤侵蚀强度评价模型,对参与建立模型的样本进行回归分析,其准判率达到80.0%以上,并且利用该模型对其他年份坡面土壤侵蚀强度实测数据进行对比验证,得到土壤侵蚀强度分级的精度较高。研究表明,建立的郧西县坡面径流小区土壤侵蚀强度评价模型有较好的适用性与可靠性,可为郧西县及类似自然地理环境的其他区域水保工作起到一定指导意义。Soil erosion becomes more serious and has threatened to social stability and security now.So we must make great efforts and pay more attention to water and soil conservation.We should put the research for soil erosion at the most important position.This paper discusses the establishment of the soil erosion caused by sloping surfaces assessment index system,and select quantification theory to realize the qualitative assessment for the soil erosion of the farming slope experimental plots in Yunxi.According the system index established,we build the qualitative assessment based on quantification theoryⅡthrough historical data.The accuracy of this model is 87.39%.All of these results demonstrate the correctness of this qualitative assessment model,and the achievement of this paper can provide a helpful reference for water and soil conservation in Yunxi.

关 键 词：坡面土壤侵蚀强度 数量化理论Ⅱ 评价模型 鄂西北 

分 类 号：S157.1[农业科学—土壤学]