具有预见期的洪水演算方法研究

利用线性运动波方程数值解的数值扩散,在一定条件下可以模拟扩散波物理扩散的观点来建立洪水演算方法,是一条不同于通过槽蓄理论建立洪水演算方法的新途径.本文采用一种新的差分格式,导出了一种新的本身具有预见期的洪水演算方法,不仅给出了用数值扩散模拟物理扩散的条件,而且给出了保证计算成果稳定性的条件.提供的计算实例表明,该法可取得具有一定预见期的令人满意的预报成果

A Study of Flood Routing Met hod with Forecast Period

Based on a new difference scheme,aflood routing method with the forecast period was derived,in which the weighted coefficient of the difference scheme is determined interms of the simulated physical dispersion principle of flood wave by numerical dispersion of the difference scheme,and the stability conditions of this method are obtained.This method was applied to flood forecasting of of the lower Yellow River,and satisfactory results were acquired.