基于DEM的等流时带内划分子流域的方法

提出了一种根据DEM资料划分等流时带进而在等流时带内部再划分子流域的方法,运用该方法对黄河流域进行了子流域划分,并在此基础上建立了水资源模拟模型.模拟结果表明:用此方法划分子流域,可以解决水循环模拟模型与水资源分配模型耦合中如何将人工控制点引入天然河网的问题;利用等流时带的概念,可以为水循环模拟模型中的汇流演算提供方便.

Method for partitioning sub-basins in the isochrones based on DEM

A method for partitioning sub-basins in the isochrones determined from a DEM was presented.The method was used to partition sub-basins in the Yellow River watershed.On this basis,a water resources simulation model was developed. The simulation results show that the problem of how to introduce manual control points into the natural river network for the coupling of the water cycle simulation model and water resources allocation model is solved with this method,and that it is very convenient to calculate flow concentration in the water cycle simulation model using the concept of isochrones.