自然排水区域内涝模拟技术研究

发布时间：2018-10-31 13:46

【摘要】：平原河网地区降雨过程中地面汇集、蓄滞,最终排出到河道是一个复杂的过程,不仅受地形的影响、还受外河水位影响,单纯的一维水动力模型或二维水动力模型无法模拟地面积水与河道水位的同步、实时变化。为了准确模拟降雨过程中自流排水区域地面汇流和河道水位的变化过程、优化区域河道布局规模和调度方式,本文综合一、二维水动力数学模型的优点,将河道与地面进行侧向耦合计算,地面低洼区域与河道进行正向耦合计算,模拟不同工况条件下区域内涝分布情况。结果表明:一、二维水动力数学模型侧向耦合和正向耦合技术可以模拟自然排水区域内涝实时分布情况,并可对不同河道规模和调度方式下区域内涝风险进行判别,为区域城市河网水系布局规划提供技术支撑。
[Abstract]:It is a complicated process that the surface collects, accumulates and lags in the process of rainfall in the plain river network area, and is eventually discharged to the river course. It is not only affected by the topography, but also affected by the level of the outer river water. A simple one dimensional hydrodynamic model or a two dimensional hydrodynamic model can not simulate the synchronous and real time variation of surface water and river water level. In order to accurately simulate the changing process of surface confluence and river water level in the process of rainfall, and optimize the distribution scale and dispatching mode of regional river, this paper synthesizes the advantages of the first and second dimensional hydrodynamic mathematical model. The lateral coupling calculation between the river and the surface and the forward coupling between the low-lying area and the river are carried out to simulate the distribution of waterlogging in the region under different working conditions. The results show that: first, the lateral coupling and forward coupling techniques of two-dimensional hydrodynamic mathematical model can simulate the distribution of waterlogging in natural drainage area in real time, and can be used to distinguish the waterlogging risk in different river scale and regulation mode. Provide technical support for regional urban river network layout planning.
【作者单位】：上海市水务规划设计研究院;
【基金】：水利公益性行业科研专项经费项目(201101052)
【分类号】：TU992

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