舟山渔港风暴潮模拟分析

孙志林; 钟汕虹; 王辰; 涂文荣; 纪汗青

doi:10.3969/j.issn.0253-4193.2020.01.014

舟山渔港风暴潮模拟分析

doi: 10.3969/j.issn.0253-4193.2020.01.014

浙江大学港口海岸与近海工程研究所，浙江杭州 310058

基金项目: 国家自然科学基金重大研究计划项目（91647209）；国家重点研发计划（2016YFC0402305-02）。

详细信息

作者简介:
钟汕虹：孙志林（1956—），男，教授，主要从事水动力数值模拟研究。E-mail：21634090@zju.edu.cn

中图分类号: P731.2
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- 文章访问数: 395
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- 被引次数: 0
出版历程
- 收稿日期: 2018-11-10
- 修回日期: 2019-03-02
- 网络出版日期: 2021-04-21
- 刊出日期: 2020-01-25

Simulation and analysis of storm surge at Zhoushan fishing port

Institute of Port Channel and Offshore Engineering, Zhejiang University, Hangzhou 310058, China

摘要

摘要: 渔港风暴潮研究对防灾减灾具有重要意义。本文构建了舟山海域嵌套网格的风暴潮模型，经天文潮与风暴潮实测资料验证效果良好。设计5个方向共14条台风路径，计算了2017年8月8−12日大潮期12～17级台风下舟山渔港的风暴潮位。结果表明，由于向岸风作用南侧SE向比北侧E向登陆台风所造成的最高风暴潮位高35.7%，差值可达82 cm；对于两端通海的舟山渔港，南侧0.5R处登陆的SE向台风，风向与东口门朝向一致而跟渔港走向斜交，有利于水体进入并滞留，此时风暴潮位最高。南侧12级台风下ESE、SE、SSE发生漫堤，而北侧登陆台风无漫堤风险，沉降等原因造成海堤防台能力两头低于中段；数值试验显示，若在小干岛东侧设置丁坝，可将17级台风作用下的漫堤概率由26.23%减为10.66%。
- 风暴潮 /
- 台风风场 /
- 数值模拟 /
- 渔港
Abstract: There is a great significance to study the storm surge in the disaster prevention and mitigation of fishing port. This paper constructs a storm surge numerical model with the nested gird at Zhoushan fishing port, and the calculated results of astronomical tide and storm tide are in a good agreement with the practice. Fourteen typhoon paths in 5 directions are designed, and the storm tide level of Zhoushan fishing port is calculated under the typhoon of 12−17 level during the great tide period of August 8−12, 2017. The results show that storm tide peak in SE path on the south side is 35.7% higher than the north E path due to the effect of the shore wind, and the difference can reach 82 cm. The Zhoushan fishing port passes through sea at both ends, and the wind direction is consistent with the east exit door and oblique to the fishing port at 0.5R SE path on the south side typhoon, which is beneficial to the water entering and staying. At this time, the storm tidal level is the highest. The 12 typhoon level of ESE, SE and SSE paths on the south side causes overflow. There is no risk of typhoon landing on the north side, and because of the settlement and other reasons, the seawalls’ defense capacities of two sides are lower than the middle section. According to numerical experiments, when a spur dike is installed on the east side of Xiaogan Island, the probability of overflow under the situation of the 17 typhoon level can be reduced from 26.23% to 10.66%.
- storm tide /
- typhoon /
- numerical simulation /
- fishing port

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图 1 计算区域网格

Fig. 1 Grid of computational area

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图 2 测点A天文大潮验证

Fig. 2 Verification of astronomic spring tide at Station A

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图 3 测点A天文小潮验证

Fig. 3 Verification of astronomic neap tide at Station A

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图 4 1211号台风期间定海站风暴潮位验证

Fig. 4 Verification of storm tide at Dinghai Station during Typhoon 1211

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图 5 台风模拟路径

Fig. 5 Typhoon simulation paths

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图 6 港内风暴潮位与风速

Fig. 6 Storm tide and wind velocity at the fishing port

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图 7 海堤的防台等级

Fig. 7 The defense level of sea dike

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图 8 东南向路径

Fig. 8 The southeast path

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图 9 台风登陆时刻渔港流速与风向

Fig. 9 Tide and wind velocity at the typhoon landing moment

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图 10 丁坝对风暴潮位的削弱效果

Fig. 10 The weakening effect of the spur dike on the storm tide level

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