基于一二维耦合的共渠西蓄滞洪区洪水演进模拟

Flood Evolution Simulation in Gongqu West Detention Basin Based on One-dimensional and Two-dimensional Coupling

蓄滞洪区的洪水演进涉及到河道和蓄滞洪区内部的洪水计算,河道和蓄滞洪区地形条件和水流流态差异较大,单独采用一维或二维水力学模型均难以计算。文章通过分析共渠西蓄滞洪区的入流洪水、边界、调度运用等条件,在实测区域地形和河道断面的基础上,采用一维和二维水力学模型,分别模拟了河道和蓄滞洪区的洪水演进过程,并进行耦合,提出不同方案的洪水演进淹没成果,对蓄滞洪区安全建设规划及防洪评价具有一定的参考价值。

The flood routing in the detention basin involves the calculation of flood in river channels as well as detention basin.The terrain conditions and flow patterns are quite different in the river channels as well as detention basin.Therefore,it is difficult to calculate by one-dimensional or two-dimensional hydraulic models alone.One-dimensional and two-dimensional hydraulics models are adopted to simulate and couple the flood routing process of the river channels as well as the detention basin respectively on the basis of the measured area topography and river cross section through analyzing inflow flood,boundary,scheduling operation and other conditions of Gongqu West Detention Basin.Different solutions of the flooding routing results are proposed with certain reference value for safety construction planning and flood control evaluation to detention basin.