基于GIS与RUSLE的榆林市土壤侵蚀空间分布研究  

Spatial Distribution of Soil Erosion Analyzed Based on GIS and RUSLE in Yulin City

作　　者：李奎[1] 岳大鹏[1] 刘鹏[1] 易浪[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《水土保持通报》2014年第6期172-178,371,共7页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目"陕北黄土高原典型小流域近500年来产沙量变化研究"(41071012);陕西省水土流失补偿费项目

摘　　要：利用3S技术,采用美国通用的水土流失方程(RUSLE),对榆林市2001和2010年的土壤侵蚀状况及其空间分布特征进行了计算分析。结果表明,榆林市2001年平均土壤侵蚀模数为4 411t/(km2·a),年均侵蚀总量为1.93×108t;2010年的平均土壤侵蚀模数为6 237t/(km2·a),年均侵蚀总量为2.72×108t。2001—2010年榆林市各区县的土壤侵蚀变化状况有着明显的空间差异,府谷、神木、榆阳、横山、靖边、佳县和子洲7个区县的土壤侵蚀类型发生了由中强度向高强度侵蚀的转化,土壤状况不断恶化。而定边、米脂、吴堡、绥德和清涧5县的土壤侵蚀类型由高强度向低强度侵蚀转变,水土流失状况得到有效遏制。Based on the technologies of 3S（RS, GPS and GIS） and universal soil loss equation（RUSLE）, soil erosion and its spatial distribution in Yulin City in 2001 and 2010 was calculated and analyzed. The results showed that mean soil erosion rate was 4 411 t/（km2 · a） and annual average sediment yield was 1.93× 108 t in Yulin City in 2001, mean soil erosion rate was 6 237 t/（km2 · a） and annual average sediment yield was 2.72× 10st in 2010. During the period from 2001 to 2010, there was an obvious spatial difference between various regions in the soil erosion change, the soil erosion intensity changed from medium to high in Fugu, Shenmu, Yuyang, Hengshan, Jingbian, Jiaxian and Zizhou County（District）, which indicated that soil con- dition deteriorated continuously. While, the soil erosion intensity changed from high to low in Dingbian, Mizhi, Wubu, Suide and Qingjian Counties, showing soil and water loss was effectively controlled.

关 键 词：RUSLE 土壤侵蚀 空间分布 榆林市 

分 类 号：S157.1[农业科学—土壤学]