洪水与风暴潮共同作用下的溃堤洪水一维、二维耦合模型及应用

发布时间：2018-05-16 16:02

本文选题：一二维耦合模型 + 溃、漫堤洪水　；参考：《南水北调与水利科技》2017年05期

【摘要】：为了解决复杂条件下河道洪水漫堤、溃堤和潮水倒灌的问题,建立了在洪水和风暴潮共同作用下的天然河道漫溃堤洪水在防洪保护区的一二维水动力耦合模型。在兼顾计算效率和精度的基础上,分区剖分网格,设置合理的网格面积;根据植被和地物的不同,分区设置糙率;通过宽顶堰的方式将河道一维模型和防洪保护区二维模型进行侧向耦合;采用基于侵蚀的渐变溃破坏方式模拟河道溃堤过程,实现了河道上游发生洪水和下游遭遇外海风暴潮的复杂情况下精细化模拟。实例研究表明,所建模型可灵活处理复杂多变的水力条件,模拟结果合理可靠,可为防汛部门制定决策提供有力的科学依据。
[Abstract]:In order to solve the problem of overtopping embankment break and tide-back irrigation under complex conditions a one-dimensional hydrodynamic coupling model of overburst flood of natural river course in flood protection area was established under the combined action of flood and storm surge. On the basis of taking into account the calculation efficiency and precision, the area of grid is set up by dividing the grid, and the roughness is set according to the difference of vegetation and feature. The one-dimensional model of river channel and the two-dimensional model of flood control protection area are coupled laterally by means of broad-topped Weir, and the process of embankment break is simulated by gradual collapse and failure mode based on erosion. The detailed simulation of the upper reaches of the river and the storm surge in the lower reaches of the river is realized. The case study shows that the model can deal with complicated and changeable hydraulic conditions flexibly, and the simulation results are reasonable and reliable, which can provide a powerful scientific basis for the decision-making of flood prevention departments.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;
【基金】：国家自然科学基金项目(51209158) 高等学校学科创新引智计划资助项目(B14012)~~
【分类号】：TV122.4

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