二维坡面雨洪水动力模型研究

发布时间：2018-05-28 04:29

本文选题：坡面流 + 扩散波　；参考：《水动力学研究与进展(A辑)》2017年04期

【摘要】：由降雨产生的坡面洪水运动过程复杂,其可靠模拟仍有待深入。该文建立了基于浅水方程的二维坡面雨洪动力过程模拟的动力波模型,选用单坡、三阶坡面和复杂起伏多变坡面的雨洪运动为数值算例,进行了数值检验并与忽略惯性项的扩散波模型进行了对比分析。结果表明:动力波模型可以较好地模拟洪水过程,在峰现时间,洪峰水位的捕捉和退水过程等方面都表现出优良的特性;而且动力波模型在复杂坡面雨洪过程计算的适应性方面表现更佳。而扩散波模型在计算精度和稳定性方面都相对要差。虽然扩散波模型在单坡面算例中的计算精度也较高,但因受忽略惯性项的影响,退水过程有明显偏离。
[Abstract]:The process of flood movement on slope caused by rainfall is complex, and its reliable simulation needs to be deepened. In this paper, a dynamic wave model based on shallow water equation is established to simulate the dynamic process of rain and flood on a two-dimensional slope. The numerical examples of rain and flood motion on a single slope, a third order slope and a complex undulating and changeable slope are selected as numerical examples. The numerical test is carried out and compared with the diffusion wave model which neglects the inertial term. The results show that the dynamic wave model can well simulate the flood process, and it has excellent characteristics in peak time, Hong Feng water level capture and receding process. Moreover, the dynamic wave model is more suitable for the calculation of rain and flood processes on complex slopes. The diffusion wave model is relatively poor in accuracy and stability. Although the accuracy of the diffusion wave model is also high in a single slope case, the water retreating process is obviously deviated due to the neglect of the inertia term.
【作者单位】：中国科学院南京地理与湖泊研究所中国科学院流域地理学重点实验室;中国科学院大学;
【基金】：国家重点基础研究发展计划(973)(2012CB417000) 水体污染控制与治理科技重大专项(2017ZX07603-001)资助项目~~
【分类号】：TV131.2

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