采用GIS的方法，建立了环县数字高程模型（DEM），研究了本区地表水流方向、集流能力、子集水区的划分及水系网络空间分布等水文特征。
By means of GIS method, the digital elevation model(DEM)is established, the flow direction, flow accumulation, subcatchment boundaries and stream network spatial distribution are studied.
流域地形是决定水系生成的一个关键性因素，是数字流域和分布式水文模型研究的主要内容。
The watershed topography is a key factor for extraction of the drainage, and it is also a very important topic in the study of digital watershed and the distributed hydrological models.
基于数字高程模型（DEM）中提取流域水系是分布式水文模拟的基础与关键。
The foundation of the simulations lies on how to obtain hydrologic and topographic parameters from Digital Elevation Model(DEM).
在数字水系生成系统的基础上，构建分别基于子流域的离散数字水文模型。
Moreover, control points, such as hydrological stations and reservoirs, are allowed to be added to the process of generating digital basin, so as to be easily coupled with hydrological model.
介绍基于地表径流漫流模型从数字高程模型(dem)提取水系的一系列算法。
A set of algorithms for extracting drainage network from digital elevation model (DEM) based on ground water overflow model is introduced.
介绍基于地表径流漫流模型从数字高程模型(dem)提取水系的一系列算法。
A set of algorithms for extracting drainage network from digital elevation model (DEM) based on ground water overflow model is introduced.
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