Annual Variation of Erosion and Deposition and Sediment Transportation Along the Northeastern Sandy Coast of the Donghai Island
LI Tian-guang
GAO Wei
ZHOU Qing-jie
YANG Qing-le
YANG Qi-zheng
ZHANG Tong-hui
QU Hong-bao
Abstract：The Donghai Island is the fifth largest island in China .The 28 km‐long beach in the east of the island is the "First Long Beach of China"and can be comparable to the"Golden Beach"of Italy .However ,this beach has been locally eroded more seriously in recent years due to the sea‐level rising and the human exploring .Based on the data from high‐precision GPS monitoring and the grain‐size analysis of surface sediments and by u‐sing the GSTA model ,the seasonal variations of erosion and deposition and the tenden‐cy of sediment transportation in the sandy beach along the northeastern coast of the Donghai Island are studied and the coastal erosion mechanism is discussed .The results reveal that the sediments of the coastal beach are dominantly transported along the coast and dispersed to the north ,w hich is mainly controlled by the tidal current .Along the southern coast of the island ,beach erosion is dominant since the lighthouse located near‐by prevents the sediment supply .Along the northern coast ,the beach is in a deposition‐al state at many places ,because the sediment transported by the alongshore current can get supply from the south and there is also a sediment supply from the sea toward the land .
Keywords：Donghai Islanderosion and depositionsediment transporation
Publication Date：2016-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 10-18 )