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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。
The HEC-RAS numerical simulation software was used to calculate the water surface line of the anonymous vent in 20-year flood event with constant flow and unsteady flow respectively. The results of two modes are compared and analyzed. The results show that the calculation results of water line elevation in constant flow mode are slightly less than those in unsteady flow mode. The difference between the two models is larger in the upper and lower reaches, while the water line in the constant flow calculation mode is more unsteady Stream mode is more gentle.