白一冰,石景元,路川藤,等. “烟花”台风影响下长江南通以下河段的增水分布特征[J]. 水利水运工程学报,2021(6):25-33. doi: 10.12170/20210930003
引用本文: 白一冰,石景元,路川藤,等. “烟花”台风影响下长江南通以下河段的增水分布特征[J]. 水利水运工程学报,2021(6):25-33. doi: 10.12170/20210930003
(BAI Yibing, SHI Jingyuan, LU Chuanteng, et al. Spatio-temporal distribution characteristics of surge in the reach below Nantong of Yangtze Estuary under the influence of Typhoon In-Fa[J]. Hydro-Science and Engineering, 2021(6): 25-33. (in Chinese)). doi: 10.12170/20210930003
Citation: (BAI Yibing, SHI Jingyuan, LU Chuanteng, et al. Spatio-temporal distribution characteristics of surge in the reach below Nantong of Yangtze Estuary under the influence of Typhoon In-Fa[J]. Hydro-Science and Engineering, 2021(6): 25-33. (in Chinese)). doi: 10.12170/20210930003

“烟花”台风影响下长江南通以下河段的增水分布特征

Spatio-temporal distribution characteristics of surge in the reach below Nantong of Yangtze Estuary under the influence of Typhoon In-Fa

  • 摘要: 为探讨台风对河口区域的影响,构建了覆盖中国东南沿海大范围数学模型,对2106号台风“烟花”产生的风暴潮进行了模拟,与实测气象及水位数据对比表明该模型可靠、合理。基于此模型,研究了“烟花”台风在长江口地区风暴潮增水的时空分布特征。研究表明,“烟花”台风期间,长江口区域整体表现为增水状态,最大增水大于0.5 m区域北至连云港、南至台州。南通以下河段最大增水值分布较均匀,均在1.5 m左右;上游区域增水幅度随潮汐过程呈规律波动,增水在涨潮中间时刻达到最大,于落潮中间时刻降至最低,至下游区域,波动规律逐渐消失;0.5 m以上增水历时从上游至下游逐渐减小。

     

    Abstract: In order to study the influence of typhoon on the estuary region, a large-scale numerical model covering China’s southeast coast was established, aiming to simulate the process of storm surge generated by the Typhoon In-Fa (No.2106). The comparison with the measured meteorological and water level data shows that the model is stable and reliable and the simulation data is reasonable. Based on this model, the spatial and temporal distribution characteristics of storm surge in the Yangtze Estuary are studied in this paper. The result shows that during typhoon periods, the whole Yangtze Estuary region becomes the storm surge state, and the area with the water increases by more than 0.5 m in height, extending to Lianyungang in the north and Taizhou in the south. The largest storm surges in the river reaches below Nantong are evenly distributed, all about 1.5 m. The variation of storm surges in the upstream area regularly fluctuate with local astronomical tide level. The maximum storm surges occur in the middle of the high tide, the minimum occurs in the middle of the ebb tide, and this regularity gradually disappears in the downstream area. The duration of the storm surges of more than 0.5 m gradually decreases from upstream to downstream.

     

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