SEDIMENT TRANSPORTATION OF LONGSHORE CURRENT AND COASTAL CURRENT IN CHINA LITTORAL ZONE

The zonal sediment distribution in the coastal zone near Yantai (from Penglai to Chucun,Weihai) results from the processes of wave,wave-produced longshore current and coastal current. Sand is distributed from high tidal level to 10 m water depth and mainly controlled by wave and longshore current. And the sediment source is from the coastal land nearby. Sand-silt-clay is mainly distributed in 10~15 m water depth. A part of sediments are the Yellow River derived sediments transported by the coastal current and a part from nearby small rivers is transported by the wave and nearshore circulation. Clayey silt and silt are distributed in the water depth of 15~20 m. They are the Yellow River derived sediment transported by the coastal current.