刘成, 胡日军, 朱龙海, 袁晓东. 庙岛群岛海域沉积动力环境分区及沉积物输运趋势[J]. 海洋地质前沿, 2018, 34(8): 24-33. DOI: 10.16028/j.1009-2722.2018.08004
    引用本文: 刘成, 胡日军, 朱龙海, 袁晓东. 庙岛群岛海域沉积动力环境分区及沉积物输运趋势[J]. 海洋地质前沿, 2018, 34(8): 24-33. DOI: 10.16028/j.1009-2722.2018.08004
    LIU Cheng, HU Rijun, ZHU Longhai, YUAN Xiaodong. DYNAMIC ENVIRONMENT DIVISION AND SEDIMENT TRANSPORT TREND IN THE AREA OFF MIAODAO ISLANDS[J]. Marine Geology Frontiers, 2018, 34(8): 24-33. DOI: 10.16028/j.1009-2722.2018.08004
    Citation: LIU Cheng, HU Rijun, ZHU Longhai, YUAN Xiaodong. DYNAMIC ENVIRONMENT DIVISION AND SEDIMENT TRANSPORT TREND IN THE AREA OFF MIAODAO ISLANDS[J]. Marine Geology Frontiers, 2018, 34(8): 24-33. DOI: 10.16028/j.1009-2722.2018.08004

    庙岛群岛海域沉积动力环境分区及沉积物输运趋势

    DYNAMIC ENVIRONMENT DIVISION AND SEDIMENT TRANSPORT TREND IN THE AREA OFF MIAODAO ISLANDS

    • 摘要: 基于庙岛群岛海域的107个表层沉积物样品粒度分析结果,利用Pejrup三角图、Gao-Collins粒径趋势分析等方法,对庙岛群岛海域沉积动力环境进行分区,并探讨了沉积物的输运趋势。结果表明,研究区沉积动力环境可划分为5个分区(A、CⅢ、CⅣ、DⅢ、DⅣ),以庙岛海峡为中心,各分区基本呈左右对称分布,与潮流流速中部辐聚、两侧辐散的分布特征相对应,研究区沉积物分布及沉积动力格局主要受潮流控制。研究区内存在两个沉积物输运趋势的汇聚中心,沉积物的长期输运趋势在海峡区主要受控于往复潮流,波流共同作用在外海区影响较为显著,使其具有与海峡区截然不同的特点。

       

      Abstract: Based on the grain size data of 107 surface sediment samples, Pejrup triangular graph and Gao-Collins grain size trend analysis are used to divide sedimentary dynamic environment and to reveal the sediments transport trend in the area off the Miaodao islands. Results show that the study area can be divided into 5 subregions (A, CIII, CIV, DIII and DIV) around the Miaodao Strait, and for each subarea, the distribution of sediemnts is basically symmetrical. There are two converging centers of sediment in the study area, the Dengzhou shoal and the central part of the Miaodao Strait. They are particularly affected by westward ebb current which leads the sediments transporting towards the Dengzhou shoal.The long-term transport trend of sediments is more pronounced by the combined action of wave and current, making it different from the strait area.

       

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