水土保持学报2017，Vol.31Issue(5)：99-107,9.DOI:10.13870/j.cnki.stbcxb.2017.05.016
典型流域土壤侵蚀演变的高程、坡度空间差异比较
Comparative Study on Spatial Difference of Elevation and Slope in Soil Erosion Evolution in Typical Watershed
摘要
Abstract
As an area with fragile ecological environment and sensitive soil erosion,the study about soil erosion on the Three Gorges Reservoir Area is of great significance to its ecological construction.In this paper,Daning River Basin and Meixi River Basin were selected as the study areas.Based on the Remote Sensing mages in the year of 1988,2000,2010 and 2015,and by using GIS and RS technique combined with field survey,the data about soil erosion were extracted and the spatial variability of soil erosion evolution in different elevations and slope belts were analyzed through the comprehensive index of soil erosion intensity and landscape pattern index.Finally,based on the natural and socio-economic analysis and the reasons of the spatial differences of the basin,this paper explores the measures for soil erosion prevention and control.The results showed that (1) the most serious soil erosion zone and its evolution trend in the two river basins were different,from the point of view in the severity of soil erosion.The most serious erosion zones of Daning River Basin were in the elevation from 1 000m to 1 200 m and in the slope from 25° to 35°,however the most serious erosion about the Meixi River Basin occurred in the elevations from 800 m to 1 000 m and in the slope of 25° to 35°;(2) the evolution of soil erosion were different in the two river basins.The soil evolution of Daning River Basin in ＞2 000 m elevation and ＞35° slope were the most serious,but not obvious in ＜200 m and 0°～5° degrees;(3) from the soil erosion landscape pattern evolution,in 800 to 1 200 m and 25° to 35° elevation slope belt,the possibility of soil erosion intensity in Daning River Basin was greater than that in Meixi River Basin.All above research results laid the foundation of the following up researches about science problem,which not only included spatial distribution of soil erosion in the height zone of 800～1 200 m with different slope and in the slope of 25° to 35° with different elevation,but also the relationship between the main natural factors and soil erosion.关键词
土壤侵蚀/典型流域/空间差异/三峡库区腹地Key words
soil erosion/typical watershed/spatial differentia/Three Gorges Reservoir Abdominal Area分类
农业科技引用本文复制引用
李睿康,李阳兵,文雯,周亚琳..典型流域土壤侵蚀演变的高程、坡度空间差异比较[J].水土保持学报,2017,31(5):99-107,9.基金项目
重庆市基础与前沿研究计划项目(cstc2015jcyjBX0128) （cstc2015jcyjBX0128）
重庆师范大学研究生科研创新项目(YKC16007) （YKC16007）
重庆市研究生科研创新项目(CYS17177) （CYS17177）
