The influence of moving speeds, wind speeds, and sea level pressures on after-runner storm surges in the Gulf of Tonkin, Vietnam
The influence of moving speeds, wind speeds, and sea level pressures on after-runner storm surges in the Gulf of Tonkin, Vietnam
复制标题
DOI：
10.1016/j.oceaneng.2020.107613
复制
发表时间：
2020-09
影响因子：
5
通讯作者：
N. B. Thủy;Sooyoul Kim;T. Anh;N. K. Cuong;Pham Tri Thuc;L. Hole
中科院分区：
文献类型：
--
作者：
N. B. Thủy;Sooyoul Kim;T. Anh;N. K. Cuong;Pham Tri Thuc;L. Hole
本研究探讨了越南北部湾海岸的后涌的机制，由于台风Kalmaegi 2014年登陆在广宁省使用耦合模型的浪涌，波浪和潮汐强迫不对称和对称的风和压力场。研究发现，后涌主要是由台风的顺风引起的，其最大涌浪位出现在路径左侧沿岸约11 h后。顺风最多可占峰值涌浪的60%。结果表明，在北海岸，风速是影响Kalmaegi涌浪的主要因素，而在西海岸和南海岸，风速和海平面气压的影响是一致的。通过数值试验发现，台风移动速度越慢，其路径右侧的增水越大，而移动速度越快，其路径左侧的增水越大。较强的风速和海平面气压相关地产生沿着整个海岸的较高涌浪。这说明非对称场对后续风暴潮的发生起着决定性的作用。
The present study investigates the mechanism of the after-runner surge on the coast of the Gulf of Tonkin, Vietnam, due to Typhoon Kalmaegi 2014 landfalling at Quang Ninh province using a coupled model of surge, wave and tide forced by asymmetric and symmetric wind and pressure fields. It is found that the after-runner surge is mainly caused by tailwinds of the typhoon, generating the maximum surge level along the shore on the left side of the track approximately 11 h delayed. The tailwind is attributed to maximumly 60% of the peak surge. As a result, the wind speed is the predominant factor on the Kalmaegi surge on the north coast, while both the wind speed and the sea level pressure have the identical impact on the west and south coasts. Through the numerical experiments, the slower moving speed results in the higher surge level on the right side of the typhoon, while the faster speed causes the higher surge level on the left side of the track. The stronger wind speed and sea level pressure correlatively generate the higher surge along the whole coast. It means that the asymmetry field is critical to the after-runner storm surge.