摘要
利用HEC-RAS数值模拟软件分别采用恒定流以及非恒定流计算20年一遇洪水工况下无名泄支的水面线。对两种模式下的计算结果进行比较分析。结果表明:恒定流模式下的水面线高程计算结果略小于非恒定流模式下的计算结果;两种模式计算结果差异在上游较大,下游较小;恒定流计算模式下的水面线较非恒定流模式下的更为平缓。
Water surface profile in flood level which occurs once in twenty years of wu mingxie river is calculated by HEC-RAS. Both steady flow calculation mode and unsteady flow calculation mode are used. Calculation results are compared and reasons which cause the different results are analyzed. The results show that calculation results of steady flow is larger than that of unsteady flow. The difference of calculation results is more obvious in upstream than in downstream. Water surface profile is more gentle in steady flow calculation mode.
出处
《上海水务》
2017年第2期6-8,11,共4页
Shanghai Water
