扩散波与马斯京根法在栅格汇流演算中的应用比较

Application and comparison of cell-to-cell diffusion wave and Muskingum routing methods

以数字高程模型(DEM)为基础,对分布式水文模型中的汇流演算方法进行研究。以皖南山区呈村流域为例,分别采用扩散波模型与马斯京根法进行栅格单元间的汇流过程模拟,对2种汇流演算方法进行应用比较。结果表明,采用2种方法模拟的洪水过程精度基本相当,均能取得较好的应用效果。通过进一步对比分析后发现,两者在描述参数与变量的空间分布、运算效率等方面存在一定的差异。

The flow routing method in the distributed hydrological model was investigated based on the digital elevation model（DEM）.The cell-to-cell diffusion wave and Muskingum routing methods were applied to the flood simulation in the Chengcun watershed,located in the southern mountainous area of Anhui Province.The results show that the performances of the two methods are comparable and can produce desirable simulation results.Further comparison and analysis show that the two methods have differences in representation of the spatial distribution of parameters and variables,as well as their computational efficiency.