基于River Tools与DEM的水文特征提取研究

Study of Extracting Hydrological Feature Based on River Tools and DEM

以甘肃省会宁县流域为研究区域,用30m分辨率的DEM作为基本的地形数据,应用美国RSI(ResearchSystem Inc)公司开发的水利信息化软件River Tools对该流域的河网、子流域边界、河网密度等水文特征的进行提取,并将水系提取结果与实际河流水系特征相比较分析.实验得到的水文特征与实际情况基本吻合,划分的流域结果相对合理,可以为会宁县生态环境监测、治理及理论研究提供相关数据支持.

Huining County watershed of Gansu Province is chosen to study in the paper. 30m resolution DEM is used as the basic topographic data. The water information software River Tools, which is developed by the RSI（Researeh System Inc） of USA, is used to extract hydrological feature of the watershed, such as river network, sub-basin boundary, density of river network and so on. Comparing with practical catchment properties,the result shows that the hydrological feature of Huining County basin extracted from DEM is consistent with the actual situation. The result of division for watershed with DEM in River Tools is relatively reasonable,and can provide related data support for managing and surveying coo-environment and theoretical research.