2001—2010年榆林市土壤侵蚀动态变化趋势  

Study on Changing Trend of Soil Erosion in Yulin City from 2001 to 2010

作　　者：李柏延[1] 任志远[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：《干旱区研究》2015年第5期918-925,共8页Arid Zone Research

基　　金：国家自然科学基金(41371523);中央高校基本科研专项(GK201101002)

摘　　要：土壤侵蚀在水土保持和荒漠化防治中扮演着重要角色,在区域水土资源的开发、保护及其利用中具有重要意义。以通用土壤流失方程为工具,采用格网技术、空间插值、空间分析、一元线性回归等技术,对栅格数据进行采样、重分类、空间统计分析,对榆林市连续10 a土壤侵蚀动态变化及其分布进行分析,并对其未来土壤侵蚀情况进行预测。研究表明:1 2001—2010年榆林市总体土壤侵蚀平均模数平稳,但在2003年和2009年出现跳跃性的拐点,2003年土壤侵蚀平均模数达到最小值,2009年土壤侵蚀平均模数达到最大值;2榆林市土壤侵蚀面积逐年增大,轻度和中度土壤侵蚀面积所占比例呈增大趋势,中度以上侵蚀面积占总面积的21.68%,轻度土壤侵蚀面积占总面积的37.91%;3工矿用地和能源开发区等土壤侵蚀较为严重;4未来几年,土壤侵蚀主要发生在府谷大部、神木中部、部分能源开发区及其周边和定边中部等地区。With the development of global social economy,the unreasonable development and utilization of natural resources of human lead to serious soil erosion and soil erosion has become one of the world＇s focus on environmental issues. Soil erosion plays an important role in soil water conservation,desertification control,is of the great significance in regional soil and water resources development,protection and utilization. Using the universal soil loss equation as the tool,by the grid technology,spatial interpolation and analysis,linear regression techniques,we conduct sample,reclassification,and spatial statistical analysis of raster data; analyze soil erosion dynamic changes and its distribution of Yulin city for 10 years,and predict soil erosion trend in future. Research shows that： 1 The soil erosion average module is generally smooth in Yulin city from 2001 to 2010,but there are jumpy inflection points in2003 and 2009,the minimum value in 2003 and the maximum value in 2009; 2 The total soil erosion area is increasing year by year in Yulin City,the mild,moderate soil erosion area proportion in increasing,especially the moderate erosion above percent 21. 68 of the total area,the light soil erosion area accounting for percent 37. 91 of the total area; 3 The soil erosion of industrial land and energy development zone is more serious; 4 In the next few years soil erosion would mainly occur in most parts of Fugu,in the central part of Shenmu and Dingbian,part of energy zone and its surrounding,etc. Through the calculation of the amount of soil erosion,the soil erosion prediction will provide the scientific basis and decision support for the prevention and protection of soil and water loss.

关 键 词：土壤侵蚀 侵蚀模数 侵蚀面积 动态变化 预测 榆林市 

分 类 号：S157.1[农业科学—土壤学]