ON THE SEDIMENTATION CHARACTERISTICS AND MORPHODYNAMIC MODEL OF THE LAIZHOU SHOAL, SHANDONG, CHINA
山东莱州浅滩地区沉积特征与沉积作用

By testing granularity of surface sediment samples, we studied sedimentary types, granularity characteristics, sediment transporting pathway, sediment migration trends, sedimentary dynamic and morphodynamic model of the Laizhou shoal. The results showed that the Laizhou shoal is sand banks/ridges made of loose clastic sediment, the formation of the shoal has profoundly changed the original sedimentary system through circulations of two symmetrical tidal residual current on both sides of the shoal, which corresponded to two sedimentary depocenters dominated by saltation and suspended load, respecitvely. Morphodynamic model of Laizhou shoals is different from the existing models about headland associated shoals, and this shoal represents a new type of headland associated sand banks/ridges.