THE DISTRIBUTION PATTERN OF SURFACE SEDIMENTS IN WENDENG OFFSHORE AREA AND INFLUENCEING FACTORS

With the 130 surface sediment samples collected from the coastal waters of Wendeng in 2013, we studied the distribution pattern of surface sediments in the study area. Combined with the initiating velocity of the surface sediment, the water depth of wave break and numerical simulation, this paper preliminarily studies the influence factors on the surface sediment distribution pattern. The results show that there are 8 types of surface sediments in the study area, including sand, silt, clay, silt, and so on. In general, the grain size of the surface sediments becomes finer from the shore to the sea, and the sorting becomes worse. The Muzhu River and Changyang River mainly influence the distribution of sediment in the eastern area, and the Huanglei river mainly affects the distribution of sediment in the west of study area. Rivers control the basic pattern of sediment distribution in the study area. The differentiation of surface sediment is controlled by wave and current. The wave is the force to lift the sand and the current the factor to transport the sediment. As the result, the coarse sediment is mainly distributed in the middle of the study area and fine sediments occur on the east and west sides.