IHACRES模型在无资料地区径流模拟中的应用研究

A Study on the Application of IHACRES Model in Runoff Simulation in Ungauged Basins

IHACRES模型以单位线为基础,结构简单、概念明确、优选参数少,在国外已被广泛研究和应用,并认为是一个相当成功的流域水文模型。选择石门、高关、白云山水库流域以及汉江支流牧马河四个流域,假定其中一个流域有实测资料,对模型进行参数优选之后移用于其它流域,分别运用 IHACRES模型和新安江模型进行径流模拟。结果表明,IHACRES模型模拟精度高于新安江模型, 对无资料地区的径流模拟更为适用。

This paper introduces and discusses the basic concepts and structure of IHACRES model based on unit hydrograph principles. As a lumped parameter conceptual rainfall-runoff model, IHACRES model has a simple structure, clear physical explanation of the dynamic response in the watersheds and a parsimonious number of parameters. IHACRES model has been widely studied abroad and it is considered as a successful model. Four watersheds were seleceted as case study with each watershed being assumed gauged basin. IHACRES model and Xinanjiang model were calibrated separately, then they were used to simulate the streamflow in the other ＇ungauged＇ watersheds. The result shows that IHACRES model is better than Xinanjiang model in Runoff Simulation in ungauged basins.