基于DEM的秋浦河流域水文特征提取研究

Research on extraction of hydrological features in Qiupu River Basin based on DEM

针对小流域水文特征提取问题,以秋浦河流域为研究对象,提出利用ArcGIS软件,以30m分辨率的池州市及黄山市DEM为数据源,结合秋浦河出水口的位置信息,利用Model Builder进行建模,对预处理后的DEM数据进行汇流分析、流域分析等一系列操作以获取秋浦河流域的水文信息。其中,将提取的秋浦河水系与BIGEMAP地图中的水体数据对照,同时将生成的秋浦河流域与安徽省水文遥测信息网提供的数据进行对比,两次目视对比都发现两者之间是相仿的。研究表明:运用DEM作为基础数据建立水文分析模型进行水文分析的做法是合理的,可以高效、准确地获取研究区的水文特征。

Aiming at the problem of hydrological feature extraction in small watershed,and taking Qiupu River Basin as the research object,this paper uses ArcGIS software,and Chizhou and Huangshan DEM with 30-meter resolution as data source,combined with the position information of Qiupu River water outlet and Model Builder Modeling to obtain hydrological information from Qiupu River Basin.Among them,the Qiupu River water system will be extracted and BIGEMAP map of the water body data control will also be generated Qiupu River and Anhui hydrological telemetry information provided from the network is made in visual comparison.The research shows that using DEM as the basic data to establish the hydrological analysis model for hydrological analysis is reasonable,and the hydrological characteristics of the study area can be obtained efficiently and accurately,to some extent,which will provide a data reference for the basin where the environmental regulation,drainage and other issues.