不同区域土地利用与土壤侵蚀空间关系研究

在总结土地利用与土壤侵蚀空间关系一般研究方法的基础上,引入并修正了土壤侵蚀强度综合指数和区域土壤侵蚀强度综合指数,对整个中国境内、辽河中下游地区、南水北调丹江口水库水源区湖北部分和广东省惠东县4个区域土地利用类型与土壤侵蚀强度空间关系进行了定量比较分析。结果表明:不同区域土地利用类型的土壤侵蚀序列各不相同,而同一区域不同时期土地利用类型的土壤侵蚀序列不确定;新出现的难利用地比长期闲置的难利用地土壤侵蚀发生率高;草地土壤侵蚀发生率偏高;耕地中旱地的土壤侵蚀发生率高;建设用地建设时土壤侵蚀强度大,而建成后土壤侵蚀强度小。

Study on Spatial Relationship of Land Use and Soil Erosion of Different Regions

The paper introduces and amends the composite indexes of soil erosion intensity and regional soil erosion intensity and conducts quantitative analysis on spatial relationship of types of land use and soil erosion intensity of whole China territory,the middle and lower areas of Liaohe River,headwater area of Danjiangkou Reservoir of South-North Water Transfer Project of Hubei part and 4 regions of Huidong County in Guangdong based on sum up of general study methods of spatial relationship of land use and soil erosion.The outcomes show that the sequence of soil erosion of types of land use in different regions is different and the sequence of soil erosion of types of land use in different periods of the same regions is uncertainty;the occurred rate of soil erosion of new wasteland is higher than that of idle wasteland for years;the occurred rate of soil erosion of grassland is higher;the occurred rate of soil erosion of non-irrigated farmland is high and the soil erosion intensity of land used for construction is great during construction and becomes smaller after completion.