基于DEM的三岔河流域河网提取分析  

Analysis of river network extraction based on DEM data in Sancha River basin

作　　者：曹敏 李飞[1] Cao Min;Li Fei(Yangling V ocational and Technical College,Yangling 712100,China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100

出　　处：《江苏科技信息》2022年第3期76-80,共5页Jiangsu Science and Technology Information

基　　金：杨凌职业技术学院自然科学研究基金项目,项目编号:A2019028;杨凌职业技术学院人文社科(教改)研究基金项目,项目编号:GJ19028。

摘　　要：文章选取贵州省三岔河流域作为研究区域,基于DEM数据,利用ArcGIS软件平台下的水文分析模块自动提取河网信息,采用均值变点法拟定最合适的集水面积阈值,分析了河网分布与地形地貌以及坡度的关系特征。结果表明:采用均值变点法确定最佳集水面积的阈值为1100,计算出的三岔河流域的河网密度为1.722 km/km^(2),河网主要分布在丘陵和小起伏山地,河网密度随着坡度的增大呈现逐渐递减的趋势。The Sancha River basin in Guizhou province was selected as the study area.Based on DEM data,the hydrological analysis module under the ArcGIS software platform was used to automatically extract the river network information,and the threshold value of the most appropriate water catchment area was determined by mean of changepoint method.The relationship between the distribution of river network and topography,landform and slope was analyzed.The results show that the threshold value for determining the optimal catchment area by mean of changepoint method is 1100,and the calculated density of river network in the Sancha River basin is 1.722 km/km^(2).The river network is mainly distributed in hills and small undulating mountains,and the density of river network gradually decreases with the increase of slope.

关 键 词：DEM 均值变点分析法 河网密度 

分 类 号：P208[天文地球—地图制图学与地理信息工程]