基于DEM的钦江流域水文特征提取研究  

Hydrological Feature Extraction Research of the Qinjiang River Basin Based on DEM

作　　者：陶艳成[1] 华璀[1] 卢远[1] 高峰[1] 苏文静[2] 

机构地区：[1]广西师范学院资源与环境科学学院,广西南宁530001 [2]广西林业科学研究院,广西南宁530001

出　　处：《广西师范学院学报（自然科学版）》2012年第4期60-64,82,共6页Journal of Guangxi Teachers Education University(Natural Science Edition)

基　　金：教育部科学技术研究重点项目(210167);广西教育厅项目(201106LX297

摘　　要：以广西钦江作为研究实例,提取了流域水流方向、汇流累积量、河网、子流域分割等水文信息,将结果与实测水文信息对比分析,结果表明模拟出的水文特征与钦江流域实际基本相符,同时也受到数据源精度、研究区地形、软件算法等的影响,特别是在地形平坦或人为干扰大的地区,提取的结果与实际相差较大。从提取的效率和精度来看,在GIS环境下基于DEM数据自动提取流域水文特征是切实可行的一种方法。发展趋势上,如何提高平坦地区水文特征提取的精度问题仍然是研究的重点、难点和方向之一。Briefly introducing the use of hydrological analysis module based on DEM data extraction,hydrologic characteristics concerning the basic principles,methods,steps and process,and by taking the Qinjiang River of Guangxi as a case to study hydrological information such as the direction of flow in river basin,confluence cumulant,river network as well as sub-basin watershed segmentation,etc.A comparative analysis is made of the results and the measured.Results show that simulated hydrological information about the hydrological characteristics and the actual Qinjiang River basin is basically consistent,which is affected also by data source accuracy,the study of terrain and software algorithm,especially in the areas of flat terrain or of human disturbance,extraction results with the real difference.From the view of efficiency and accuracy,in the GIS environment,based on DEM data,automatic extraction of watershed hydrological characteristics is feasible.From the point of development trend,how to improve the extraction accuracy of hydrology feature in flatness area is still the focus of study,the nodus of study and the direction of study.

关 键 词：DEM 河网 水文信息提取 研究 

分 类 号：P208[天文地球—地图制图学与地理信息工程]