三亚市雨、洪、潮多元耦合精细化洪涝分析数值模型

三亚市作为典型的沿海城市,频繁遭受台风扫掠,暴雨和风暴潮常伴随而至,与内陆城市洪涝相比三亚市洪涝成灾因素更复杂、影响更严重。基于高精度DEM数据建立三亚市主城区暴雨、洪水与风暴潮多元耦合精细化洪涝分析模型,精细的还原计算区域内主要内边界,采用分区糙率体现不同下垫面的影响,利用干湿判别理论处理动边界,计算获得三亚市主城区不同重现期洪涝灾害易涝点、积水深度及其影响情况,研究成果对于科学指导三亚市洪涝风险分布特征及风险管理与规避具有重要的现实意义。

Numerical model of precise flood analysis of multiple couple of storm, flood and tide in Sanya

As a typical coastal city, Sanya frequently suffers from typhoon, heavy rain and storm. Compared with the cities in inland area,the factors of flood disaster in Sanya are more complex and the influences are more serious.The paper built a storm, flood, tide multiple coupling numerical model based on high precision DEM data,precisly restored the main boundaries,and used partition roughness to reflect the impact of different dowm face,and used wet-dry theory to deal with variable boundary.This paper got the point of flood disaster,depth of water and influence factor in main suburb of Sanya.The result has importment real significance for the scientific guidance, risk management of flood disaster in Sanya.