文登近岸海域表层沉积物分布特征及影响因素

根据2013年文登近岸海域130个表层沉积物样品资料,分析了研究区表层沉积物分布特征,结合表层沉积物起动流速、波浪破碎水深和潮流数值模拟等资料,初步探讨了表层沉积物分布格局的影响因素。结果表明,研究区表层沉积物主要包括砂、粉砂、黏土质粉砂等8种类型,由岸向海粒径变细、分选变差。母猪河、昌阳河主要影响研究区东部沉积物的分布,黄垒河主要影响研究区西部沉积物的分布,河流的存在控制着研究区沉积物分布的基本格局。"波浪掀沙,潮流输沙"控制了表层沉积物的分异,形成了研究区中部颗粒较粗,东西两侧颗粒较细的沉积物分布规律。

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 dis- tribution of sediment in the eastern area, and the Huanglei river mainly affects the distribution of sed- iment 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.