单元坡面汇流过程研究

随着计算机和GIS技术的不断发展与应用,分布式水文模型,特别是流域分布式暴雨—径流模型,已成为研究的热点。但是,该模型模拟水文过程的峰现时间普遍存在滞后现象,如何提高分布式暴雨—径流模型模拟峰现时间精度是目前研究的难点。本文通过实验室模拟实验,得到了不同雨强落至不同坡度下垫面上的单元坡面汇流过程曲线,在霍顿汇流模型基础上,提出新的水面线方程,改进了霍顿汇流模型,从而为修正流域分布式暴雨—径流模型,进一步模拟水文过程并为比较准确预报峰现时间提供了实验基础和理论依据。

The research for the rainfall and runoff collection course on the cell slope

With the development and application of the computer and GIS technology,distribution hydrology model,especially drainage basin distribution rainstorm-runoff model,has become a hotspot.But the model simulates the peak time of hydrology course always delay,how to improve it's the precision is current focus.This paper through the simulation experiment in the laboratory,the cell slope rainfall collection course curves of the different rainfall down to different slope are gained.Based on the Holden collection model,the water surface line equation is put forward,which improves the former and corrects the runoff model and provides the experiment basis and theory gist for relative nicety to forecast the time of peak occurring.