由DEM确定R-V地貌瞬时单位线的研究

Study on R-V GIUH by Use of DEM

介绍了地貌瞬时单位线(R-VGIUH)的基本理论与理论基础。由于以往确定流域单位线需要大量的降雨径流实测资料,试图应用地理信息系统(GIS)技术建立流域数字高程模型(DEM),从而可以仅依据地形资料来确定R-V地貌瞬时单位线,解决无资料地区的洪水预报问题。以长江三峡区间沿渡河流域为例,取得了较好的成果。

The basic theory of R-V GIUH is introduced.Due to a lot of data of precipitation and runoff are needed when determining a basin's unit hydrograph,the method of applying Geographic Information System(GIS)to establish basin's Digital Elevation Model(DEM)is presented.The unit hydrograph can be determined only on the basis of topographic date to resolve the problem of the flood forecasting in the data shortage region.The method is applied in Yanduhe River Basin of Three Gorges Interval of Yangtze River and the results are satisfactory.