河道型水库动库容分析方法

Backwater storage analytic method for river type reservoirs

提出附加调蓄量的概念,采用附加滩地断面积的方法模拟附加调蓄量,使河道水流系统的蓄量等价于水库的实际蓄量.通过反分析方法确定区间入流过程,应用具有附加滩地的河道水流系统模拟水库调洪系统.通过四点线性隐格式求解河道水流方程,建立水库动库容的分析方法,并成功地应用于水口水库的洪水演进模拟,得到了静库容方法与动库容方法推算入库流量的误差.计算结果表明,本文方法是可行的,可以应用于工程实际.

A concept of additional storage capacity was introduced and simulated with the additional cross section area of river beach, so that the storage capacity of the river system is equal to the real storage capacity of the reservoir system. In this study, the reverse analysis method was usedto determine the inflow process, and the river system with additional cross section area was applied to simulation of the reservoir flood routing system. By solution of the river flow equation with four-point linear implicit scheme, a reservoir backwater storage analytic method was established. The method was applied to flood routing for the Shuikou Reservoir, and the difference of inflow discharges calculated by backwater storage capacity and static storage capacity was obtained. The result shows that the method is reliable and can be applied to engineering.