摘要
扩散波概念的提出至今已有近半个世纪。在前人研究的基础上，着重讨论如何把扩散波解析解用到天然河道的洪水演算中去，即通过把入流过程离散成带常系数的单位矩形入流之和，将单位线概念引入具有自由下边界的线性扩散波洪水演算模型，并给出了确定天然河道Ｃｋ和μ的实用方法。用于黄河下游６个河段的洪水演算获得了令人满意的成果。扩散波洪水演算模型，继承了水力学方法的长处，又具有水文学方法的优点。
This paper proposes a flood routing model based on the analytical solution of the linear diffusion wave equation with free downstream conditions. In this model, the discretization of inflow hydrograph is represented by using the series of the unit rectangle impulse function with constant coefficients, and the concept of the unit hydro- graph is introduced into.Moreover, the methods of determining parameters of the flood wave celerity Ck and the dif- fusion coefficientsμ are derved in this model. The model is applied to the flood routing of the six reaches of the lower Yellow River and satisfactory results are obtained.
出处
《水文》
CSCD
北大核心
1999年第6期3-7,共5页
Journal of China Hydrology
关键词
扩散波
洪水演算
波速
扩散系数
单位线
diffusion wave, flood routing, wave celerity, diffusion coefficient, unit hydrograph
