街区尺度风暴潮漫滩数值模拟  

Numerical simulation of storm surge inundation in block scale

作　　者：张露 傅赐福 董剑希[1,2] 于福江[1,2] Zhang Lu;Fu Cifu;Dong Jianxi;Yu Fujiang(National Marine Environmental Forecasting Center,Beijing 100081,China;Key Laboratory of Research on Marine Hazards Fore-casting,National Marine Environmental Forecasting Center,State Oceanic Administration,Beijing 100081,China)

机构地区：[1]国家海洋环境预报中心,北京100081 [2]国家海洋局海洋灾害预报技术研究重点实验室,北京100081

出　　处：《海洋学报》2021年第10期38-49,共12页

基　　金：国家重点研发计划(2016YFC1401503)。

摘　　要：本文利用ADCIRC模型,在宁波市北仑区建立了街区尺度的风暴潮漫滩模型,北仑区陆地分辨率达5~10 m。模拟结果整体展现漫滩淹没城市街道建筑的过程,细致刻画了水流在街区和建筑错综复杂分布时的流动情况,以及不同建筑物附近水深的变化,比以往的漫滩模拟更加精细,体现街区尺度网格的优势。数值模拟结果表明:此模型可以较好地模拟1211号台风“海葵”和5612号台风“温黛”的风暴潮过程。利用卫星遥感图像对北仑区地物进行分类,考虑下垫面底摩擦变化对漫滩模拟的影响。对比未考虑底摩擦情况的模拟实验结果,淹没面积减少了21.4%,大部分区域水深降低在0.1~0.2 m,街区尺度网格细致展示出不同地物所在区域的水深降低程度以及淹没面积变化。This paper uses the ADCIRC model to establish a block-scale storm surge inundation model in the Beilun District,Ningbo City,with a land resolution of 5−10 m in the Beilun District.The simulation results show the overall process of inundation flooding urban street buildings,and detail description of the flow of water in the complex distribution of blocks and buildings,as well as changes in water depth near different buildings,which are more refined than previous inundation simulations,reflecting the advantages of block scale grid.Numerical simulation results show that this model can simulate the storm surge process of No.1211 Typhoon“Haikui”and No.5612 Typhoon“Wanda”well.Satellite remote sensing images are used to classify features in the Beilun District,and the influence of changes in the friction of different underlying surfaces on inundation simulation is considered.Comparing the results of the simulation experiment without considering the underlying surface friction,the submerged area is reduced by 21.4%,and the water depth in most areas is reduced to 0.1−0.2 m.The block-scale grid shows the degree of water depth reduction and the change of submerged area in different areas.

关 键 词：风暴潮 漫滩 街区尺度 下垫面底摩擦 

分 类 号：P731.23[天文地球—海洋科学]