A Research on Fluctuations of Water Level in Guangxi Coast Caused by Typhoons in the Northern South China Sea
CHEN Bo
DONG Dexin
CHEN Xianyun
DING Yang
ZHENG Binxin
QIU Shaofang
Abstract：Fluctuation of water level in Guangxi near coast is mainly caused by typhoon-induced storm surges.Influenced by typhoon,the maximum increase and decrease in the water level in Beihai Observation Station over last 42 years are 1.45 m and-1.87 m.The water level always decreases at first and then increases in Guangxi near coast controlled by tracks of typhoons.Besides,indirect influence of westward coastal-trapped wave along Guangdong continental shelf also affects the water level greatly.A portion of westward coastal-trapped wave directly passes through the Qiongzhou Strait into the Beibu Gulf,and the other portion moves around the southern part of Hainan Island into the Beibu Gulf in a clockwise manner.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 water level in Guangxi near coast on July 8.At 18:00 of July 2,2001,though typhoon Durian landed in Guangxi,the westward coastal-trapped wave led a strong westward flow along Guangxi coast,and the geostrophic flow's velocity in the surface reached 92cm/s.Apart from direct and indirect influence of typhoon on the fluctuation of water level along Guangxi coast,the particular topography and atmospheric gravity waves also have an effect on the fluctuation of water level.
Keywords：fluctuation of water leveltyphoonGuangxi near shorecoastal-trapped wave
Publication Date：2017-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：11( 1-11 )