水流数值模拟在滞洪区中的应用

滞洪区行蓄洪水时，水流形态复杂，传统的一维恒定、非恒定流计算方法将不满足要求，二维非恒定流数学模型能够较为准确地全面模拟计算域内水流的运动、水位的变化过程、冲淤情况等。在介绍二维非恒定数学模型原理的基础上．对崔家桥滞洪区行蓄洪水过程进行了模拟，并结合实际工程项目，对石郑客运专线铁路桥和锦郑成品油管道穿越崔家桥滞洪区的修建工程前后．进行了域内洪水演进、淹没及工程位置处流速状况的计算分析，为防洪评价提供了科学依据。

Application of Flow Numerical Simulation in the Detention Basin

When the flood run into the flood detention basin, the flood flow pattern is very complex, the traditional meth- ods are unappeasable, the Two-Dimensional Unsteady Flow Mathematical model can overall simulate the instance of flood- movement, flood-level and clash-sih in the basin. Based on the introduction of the theory of the Two-Dimensional Un- steady Flow Mathematical model, simulating the flood of the Cuijiaqiao Flood Detention Basin, combining with the project item that the railroad bridge of Shijiazhuang-Zhengzhou passenger railroad and the Jinzhou-Zhengzhou oil pipeline through the Cuijiaqiao Flood Detension Basion, simulating the flood evolution, submerge and analyzing the flow velocity of the project position from the project beginning to end, it is provided the scientific basis for the flood control impact assessment.