华东师范大学学报（自然科学版） ›› 2021, Vol. 2021 ›› Issue (3): 138-150.doi: 10.3969/j.issn.1000-5641.2021.03.014

• 河口海岸学 • 上一篇    下一篇

陆面-河网耦合模型在极端风暴潮淹没危险性分析中的应用

滕飞1,2,*(), 李路1,2, 贝竹园3, 王军3, 邱桔斐4, 章晓洁4   

  1. 1. 上海市水利工程设计研究院有限公司, 上海　200061
    2. 上海滩涂海岸工程技术研究中心,上海　200061
    3. 上海市海洋管理事务中心, 上海　200050
    4. 国家海洋局东海海洋环境调查勘察中心, 上海　200137
  • 收稿日期:2020-05-10 出版日期:2021-05-25 发布日期:2021-05-26
  • 通讯作者: 滕飞 E-mail:373663745@qq.com
  • 基金资助:
    上海市科学技术委员会科研项目(19DZ1201500)

Application of a surface and river network coupled model on waterlogging distribution analysis and risk assessment for a region suffering from extreme storm surges

Fei TENG1,2,*(), Lu LI1,2, Zhuyuan BEI3, Jun WANG3, Jufei QIU4, Xiaojie ZHANG4   

  1. 1. Shanghai Water Engineering Design and Research Institute Co. Ltd., Shanghai　200061, China
    2. Shanghai Engineering Research Center of Coastal Zones, Shanghai　200061, China
    3. Shanghai Administration Center for Ocean Affairs, Shanghai　200050, China
    4. East Sea Marine Environmental Investigating & Surveying Center, SOA China, Shanghai　200137, China
  • Received:2020-05-10 Online:2021-05-25 Published:2021-05-26
  • Contact: Fei TENG E-mail:373663745@qq.com

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摘要：

在风暴潮灾害中, 台风、天文高潮位、区间暴雨和上游洪水等因子存在同时出现的可能, 对沿海地区的防汛安全形成了较为严重的威胁. 双因子、多因子影响下的复合风暴潮灾害成为沿海地区灾害风险评估的主要研究对象. 风暴潮水通过漫堤和溃口进入陆域后, 河网对潮水的调蓄和运输作用直接影响对受灾区域灾害危险性的评估结果. 本研究选取上海市金山区作为典型区域, 基于MIKE11和MIKE21模型分别建立金山区一维河网模型和二维陆面模型, 并进行耦合计算, 模拟分析在风暴潮、台风、区间暴雨和流域洪水的综合影响下, 金山区地面积水变化过程, 为区域的灾害危险性分析提供依据. 模型计算结果表明, 在考虑陆域河网调蓄作用后, 风暴潮引起的金山区地面积水大幅度减小, 区域内整体淹没分布出现一定程度的改变. 综合考虑风暴潮及区间暴雨和流域洪水与仅考虑风暴潮条件相比, 金山区中部和北部大部分区域危险性等级降低, 西北角危险性等级升高.

关键词: 风暴潮, 河网, 一、二维模型耦合

Abstract:

Extreme precipitation and floods may occur during a storm surge hazard, accompanied by typhoon conditions and high tide levels. The combination of these factors intensifies the risk of flooding in coastal regions suffering from a storm surge. Thus, multi-impact analysis should be applied to determine flood risk during a storm surge. River networks play an important role in flood processes. The storage and transportation capacity provided by rivers can directly change the distribution of a flood. In this paper, a 1-D river network model and a 2-D surface model were respectively established and coupled to simulate the flood processes during an assumed storm surge in Jinshan District, Shanghai. The cumulative influence of the concurrent storm surge, typhoon, rainfall, and upstream flooding was explored to support hazard risk analysis for Jinshan District. The coupled model’s simulation indicated a clear decrease in the number of waterlogged areas in Jinshan District after considering the river network’s storage and transportation capacity during a storm surge event. The distribution of predicted waterlogged areas also changed; according to the simulation results, the flood risk grade decreased in the central and northern Jinshan District and rose in the Northwest corner.

Key words: storm surge, river network, 1-D and 2-D coupled hydrodynamic model

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