水土保持学报2017，Vol.31Issue(5)：93-98,6.DOI:10.13870/j.cnki.stbcxb.2017.05.015
辽宁省侵蚀沟发育特性及地形分异特征
Development Characteristics and Topographic Differentiation Features of Erosion Gully in Liaoning Province of China
摘要
Abstract
In order to explore the influence of topographic factors on the development of erosion gully,regrading Digital Elevation Model(DEM) at different levels was conducted in the study area.The erosion gully distribution data were obtained from the results of the Erosion Gully Census in the First National Water Resources Census (2010) and the results of the Erosion Gully Census in the Fifth Soil Erosion Census In Liaoning Province (2015).Erosion gully elevation,slope,slope aspect,slope length and space differentiation were based on the 1 ∶ 50 000 DEM.This study analyzed the characteristics of erosion gully development and topographic differentiation in Liaoning province of China with the supported of geographic information system (GIS) and remote sensing (RS) technology.The results showed that the erosion gully density increased 0.02 km/km2 in the study area within 5 years,and the erosion gully mainly concentrated in the western Liaoning.The change value of the erosion gully density were less than 50 m/km2 in more than 70％ of the study area,most of them were in the micro enhancement zone.The change value of density was maximum when the elevation was between 325 m and 350 m.The change values of density of the south slope and southwest slope were the maximum.When the slope was between 1.5° and 15°,the graph of change density was parabolic,and there was no obvious change when the slope was less than 1.5° and more than 15°.The density change was the maximum when the slope length was between 600 m and 800 m,and there was no significant difference in density change when the slope length was more than 1 000 m.关键词
土壤侵蚀/侵蚀沟地形分异/地理信息系统/侵蚀沟密度Key words
soil erosion/topographic differentiation of erosion gully/geographic information system/gully density分类
农业科技引用本文复制引用
黄萌,范昊明..辽宁省侵蚀沟发育特性及地形分异特征[J].水土保持学报,2017,31(5):93-98,6.基金项目
国家自然科学基金项目“东北黑土低山丘陵区融雪侵蚀机理与过程研究”(41371272) （41371272）
