Water level fluctuations in Guangxi near coast caused by typhoons in South China Sea

International Conference on Water Resource and Environment 2016

地球科学;生态环境科学

Chen, B.^1 ; Shi, M.C.^2 ; Chen, X.Y.^1 ; Ding, Y.^2 ; Zheng, B.X.^3 ; Dong, D.X.^1 ; Qiu, S.F.^1

Guangxi Key Laboratory of Costal Marine Environmental Science, Guangxi Academy of Sciences, Nanning, Guangxi

530007, China^1

Ocean University of China, Qingdao, Shandong

266003, China^2

Third Institute of Oceanography, State Oceanic Administration, Xiamen, Fujian

361005, China^3

关键词: Atmospheric gravity waves;    Coastal-trapped wave;    Continental shelves;    Geostrophic flow;    Pearl River estuary;    Qiongzhou strait;    South China sea;    Water-level fluctuation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/39/1/012029/pdf
DOI  :  10.1088/1755-1315/39/1/012029

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The increasing and decreasing water level in Guangxi near the coast is mainly caused by typhoon-induced storm surges. The maximum values of increase and decrease recorded at the Beihai Station over the last 42 years are 1.45 m and -1.87 m. The water level first decreases and then increases in Guangxi near the coast. Apart from the direct influence of typhoons, the westward coastal-trapped wave along the Guangdong continental shelf is also greatly affected. A portion of the westward coastal-trapped wave passed directly through the Qiongzhou Strait into Beibu Gulf, and the other portion passed through the southern part of Hainan Island into the Beibu Gulf. On July 2, 2001, the westward coastal-trapped wave caused by Typhoon Durian induced a strong westward flow along the Guangxi coast, and the geostrophic flow velocity on the surface reached 92cm/s. On July 6, 2001, though Typhoon Utor landed at the northern part of the Pearl River Estuary, it widely induced a 20-cm increase in the water level in Guangxi near the coast on July 8. Apart from the direct and indirect influences of typhoons on the fluctuation of the water level along the Guangxi coast, the particular topography and atmospheric gravity wave also have affect the fluctuation of the water level.