刘强, 项立辉, 张刚, 欧阳凯. 苏北废黄河口表层沉积物分布特征及其控制因素[J]. 海洋地质与第四纪地质, 2018, 38(1): 118-126. DOI: 10.16562/j.cnki.0256-1492.2018.01.012
引用本文: 刘强, 项立辉, 张刚, 欧阳凯. 苏北废黄河口表层沉积物分布特征及其控制因素[J]. 海洋地质与第四纪地质, 2018, 38(1): 118-126. DOI: 10.16562/j.cnki.0256-1492.2018.01.012
LIU Qiang, XIANG Lihui, ZHANG Gang, OUYANG Kai. Distribution pattern of surface sediments around the abandoned Yellow River estuary of North Jiangsu Province and its controlling factors[J]. Marine Geology & Quaternary Geology, 2018, 38(1): 118-126. DOI: 10.16562/j.cnki.0256-1492.2018.01.012
Citation: LIU Qiang, XIANG Lihui, ZHANG Gang, OUYANG Kai. Distribution pattern of surface sediments around the abandoned Yellow River estuary of North Jiangsu Province and its controlling factors[J]. Marine Geology & Quaternary Geology, 2018, 38(1): 118-126. DOI: 10.16562/j.cnki.0256-1492.2018.01.012

苏北废黄河口表层沉积物分布特征及其控制因素

Distribution pattern of surface sediments around the abandoned Yellow River estuary of North Jiangsu Province and its controlling factors

  • 摘要: 基于苏北废黄河口附近海域表层沉积物粒度分析结果,分析研究了废黄河口表层沉积物分布特征及其控制因素。研究结果表明:废黄河口表层沉积物类型主要有粉砂质砂、砂质粉砂、粉砂和泥等4种,其中粉砂为分布最广的沉积物类型,分布面积在50%以上;粉砂粒级为研究区最主要的粒级组分,平均含量高达66.3%;表层沉积物优势粒径高度集中,从泥-粉砂-砂质粉砂-粉砂质砂,主峰Φ值不断变小,在细颗粒一侧的低频率尾部逐渐变长。研究区沉积环境可分为高能量区和低能量区,低能量区又可细分为浅水亚区和深水亚区;研究区水动力主要以波浪和潮流作用为主,其中港池南侧近岸主要受波浪作用控制,水动力条件最强,砂质粉砂覆盖区受波浪和潮流作用的双重影响,粉砂覆盖区主要受潮流作用影响。

     

    Abstract: The distribution pattern of sediments and its controlling factors are studied based on grain size analysis results of surface sediments collected from the coastal waters surrounding the abandoned Yellow River Estuary of Jiangsu Province. Results show that there are four kinds of sediments i.e. silty sand, sandy silt, silt and mud in the study area, dominated by silt, which is 66.3% in content and covers 50% of the area. Dominant particles are very concentrated, and the Φ value of main peak decreases with the increase in grain size from mud to silt, sandy silt and silty sand, and the tail of the low frequency are always longer on the side of fine particles. In terms of sedimentary environment, the study area is divided to high energy and low energy regions, and the low energy region could be further subdivided to shallow water and deep water areas. The distribution pattern of sediments of the study area is mainly controlled by wave and tidal currents. Off the south shore of the harbor where the sediment is coarser, wave action dominates and the hydrodynamic condition is the strongest. The area covered by sandy silt, however, is mainly controlled by both the actions of wave and tidal currents, and the area covered by silt is under the control of tidal current.

     

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