Yangtze flood simulation analysis for Yichang-Wuhan stretch

This paper introduces the fundamental principle and parameter rating method of multiple input and single output system model for simulating flood forecast.The historic measured data from 3 hydrologic basic stations of Shashi,Luoshan and Hankou on main stem of Yangtze and major hydrologic basic stations on tributaries are selected for flood simulation analysis.The model is applied to simulate the Yangtze flood.The flood season data of major flood years 1981,1982,1983,1995 and 1996 are selected as rating data,and the data of 1998 is selected for checking.The computational results are satisfactory with high accuracy.The model efficiency coefficient is over 97%,while the relative error of flood volume is less than 1.5%.