摘要
利用研究区地形图制作数字高程模型(DEM),并由DEM提取坡度、坡向图,与土地利用类型、土壤侵蚀强度和抚仙湖历年水质(透明度、TN、TP平均值)等专题信息叠置,提取水土保持专题信息,并对提取结果进行应用分析,以确定抚仙湖流域不同土地利用类型和地形因子与侵蚀类型及侵蚀过程的关系。研究结果表明:抚仙湖的水质和流域的土地利用状况相关,抚仙湖流域土壤侵蚀方式具有明显的垂直分带性,土壤侵蚀强度受到土壤类型和植被覆盖状况的影响。不同坡向的侵蚀强度有明显差异,同时坡度不同是引起土壤侵蚀类型差异的主要因素。
Digital Elevation Mode （DEM） was made based on topographic map of the study area, slope and aspect were computed according to DEM. The information of special topic on soil and water conservation was collected, by overlapping the special information of the land use type, intensity of soil erosion and seawater quality of Fuxian Lake（transparency, TN, TP, on average） in order to determine the relationship of the different types of land-use, terrain factors, the soil erosion types and corrosion process. Analysis on the application of the collected data was carried out and conduct applied on. The results showed that water quality in Fuxian Lake related to the land-use, and soil erosion patterns showed distinct vertical zonality in Fuxian Lake basin, soil erosion intensity was affected by the soil type and vegetation coverage condition. Different aspects of slopes made erosion intensity diverse obviously, and different ranges of slope led to diversity in the main soil erosion types.
出处
《水土保持研究》
CSCD
北大核心
2009年第4期76-79,共4页
Research of Soil and Water Conservation
基金
上海市优秀学科带头人项目(07XD14010)
