分汊河道水力计算的联解法

HydrauLic Calculation for a Branched Channel with Join Solution

本文使用联解方法,计算分汊河道分流口和汇流口的水位以及各汊河的分流量。在已知上、下游水位边界、河床断面间距和水深以及有关糙率系数的数值后,任意假定合理的初始条件,经过逊松驰迭代都可得同样正确的计算结果,文中举出两个例子作为佐证。本法使用水位控制计算流量,可供工程上计算使用。分点输入断面数据并考虑滩、槽不同糙率系数的方法也较按近实际。

In this paper, the water lever of bifuration and confluence of a branched channel and the diversion discharge of each branch are calculated with a join solution When water level boundary conditions, spaces between cross-sections, water depths and related roughness coefficients of both the upper and lower reaches are known, accurate calculatiln results can be obtained for arbitrary rational assumptions of initial conditions through SOR iteration, which is preyed by two cases. The solution is useful for engineering purposes in which discharges can be calculated by controlling water levels. The methods of individually imputting data of cross—sections and considering different Manming's factors at main channel and floodplain are also practical.