莱州湾西南岸海域悬浮泥沙与沉积物粒度分布特征

摘要

According to the data of samples of suspended sediments and surface sediments collected from the southwest coastal Laizhou Bay in winter 2007, the sediment transport tendency and the sedimentary characteristics are analyzed, and the relation between suspended sediments and surface sediments is discussed. The research results show that the suspended sediment concentration increases gradually from the seashore to the offshore area, and the north is higher than the south;the grain size of surface sediments shows zonal distribution in the horizontal direction, and reduces gradually from the coast to the offshore under the hydrodynamic effect. Taking the published conclusions for consideration, this study explains that the sediments mainly come from the Yellow River sediments in the northern sea area of the Zimaigou channel, and the sediments of the southern sea area are from the resuspended action of the surface sediments and the transportation from the beach.%根据2007年冬季莱州湾西南岸海域沉积物和悬浮泥沙的调查数据，分析了海底表层沉积物与悬浮泥沙的关系，并结合表层沉积物的粒度特征，探讨了该海域泥沙的输运及沉积特征，对海域的泥沙来源进行了初步分析。结果表明，含沙量总体表现出近岸含沙量低，远岸含沙量高，底层含沙量高于表层含沙量，且北部含沙量高于南部的分布特点；底床沉积物呈现带状分布特征，在水动力条件的作用下，粒径由岸向海逐渐变细。结合已有研究资料综合分析认为，淄脉沟以北海域泥沙主要来自于黄河入海泥沙，淄脉沟以南海域受黄河入海泥沙影响较小，主要源于近岸浅滩和海底表层沉积物的再悬浮和搬运。