莱州屺姆岛-刁龙咀近岸海域沉积物格局与粒径趋势

严立文, 黄海军, 刘勇, 杨曦光, 刘晓

严立文, 黄海军, 刘勇, 杨曦光, 刘晓. 莱州屺姆岛-刁龙咀近岸海域沉积物格局与粒径趋势[J]. 海洋地质与第四纪地质, 2014, 34(1): 29-36. DOI: 10.3724/SP.J.1140.2014.01029
引用本文: 严立文, 黄海军, 刘勇, 杨曦光, 刘晓. 莱州屺姆岛-刁龙咀近岸海域沉积物格局与粒径趋势[J]. 海洋地质与第四纪地质, 2014, 34(1): 29-36. DOI: 10.3724/SP.J.1140.2014.01029
YAN Liwen, HUANG Haijun, LIU Yong, YANG Xiguang, LIU Xiao. SEDIMENT DISTRIBUTIONAL PATTERN AND GRAIN SIZE TRENDS IN THE COASTAL AREA OF QIMU ISLAND-DIAOLONG CAPE, LAIZHOU[J]. Marine Geology & Quaternary Geology, 2014, 34(1): 29-36. DOI: 10.3724/SP.J.1140.2014.01029
Citation: YAN Liwen, HUANG Haijun, LIU Yong, YANG Xiguang, LIU Xiao. SEDIMENT DISTRIBUTIONAL PATTERN AND GRAIN SIZE TRENDS IN THE COASTAL AREA OF QIMU ISLAND-DIAOLONG CAPE, LAIZHOU[J]. Marine Geology & Quaternary Geology, 2014, 34(1): 29-36. DOI: 10.3724/SP.J.1140.2014.01029

莱州屺姆岛-刁龙咀近岸海域沉积物格局与粒径趋势

基金项目: 

国家自然科学基金项目(41076031)

海洋公益性行业科研专项经费项目(200905004)

海洋沉积与环境地质国家海洋局重点实验室开放基金项目(MASEG200807)

详细信息
    作者简介:

    严立文,(1979-),男,博士,助理研究员,主要从事海岸带沉积环境研究

  • 中图分类号: P736.2

SEDIMENT DISTRIBUTIONAL PATTERN AND GRAIN SIZE TRENDS IN THE COASTAL AREA OF QIMU ISLAND-DIAOLONG CAPE, LAIZHOU

  • 摘要: 屺姆岛-刁龙咀岸段为独具特色的沙坝-潟湖海岸,其近岸海域的动力沉积环境和泥沙输移直接影响了这一特色海岸形态的发育,在该区人类工程活动日益加剧的背景下,加深对这一近岸浅水环境的认知显得尤为重要。2010年12月在屺姆岛-刁龙咀沿岸海域(0~-12 m)进行了表层沉积物取样,综合采用激光粒度仪和筛选法进行粒度分析,依据更具沉积动力学表征意义的Fork分类法进行沉积物分类命名和粒度参数计算。结果显示,表层沉积物空间分布主要受控于由岸向海的分带性、物源供给(主要为界河)和岸线走势,近岸沉积物以推移质组分为特征,离岸在71~63 μm处粉砂粒组呈现的峰值揭示了波流联合作用的强动力环境。粒径趋势分析显示,该海域沉积物运移方向以SW向沿岸输沙为主,地形控制下在石虎咀南侧次级海湾存在一个逆时针的绕流。
    Abstract: The Qimu Island-Diaolong Cape region is famous for its unique barrier-lagoon coast. The coastal sedimentary environment and sediment transport directly influence the coastal morphological evolution. As far as human activities are considered, more attention shoud be paied to the coastal environment. Surface sediments were sampled off (0~12 m) the Qimu Island-Diaolong Cape in December, 2010. Sediment grain sizes were tested using Laser Diffracting and screening Method. Sediment types were named after Folk et al. (1970) s classification and grain-size parameterse calculated with Fork-Ward method (1957), which have been proved to be more suitable for understanding sediment dynamics. In terms of spatial distribution, the surface sediment is getting finer off the coast. under the dynamic influenc of local environment(water depth, sediment sources, hydrodynamics, et al.). Bed-load dominates the nearshore sediments with a peak value at 71~63 μm, indicating strong hydrodynamics composed of strong waves and longshore currents. The results of GSTA (grain size trend analysis) Model indicates that seabed sediment transport alongshore towards southwest direction. In addition, the influence of underwater topography and river's input is obvious. Vectorial resuls reveal an anticlockwise circumfluence in the southern Shihu Cape.
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  • 收稿日期:  2012-10-27
  • 修回日期:  2012-11-09

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