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2008年洪水期长江口滨外区悬浮泥沙特征

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胡刚, 刘健, 时连强. 2008年洪水期长江口滨外区悬浮泥沙特征[J]. 海洋地质前沿, 2011, 27(9): 6-10.
引用本文: 胡刚, 刘健, 时连强. 2008年洪水期长江口滨外区悬浮泥沙特征[J]. 海洋地质前沿, 2011, 27(9): 6-10.
shu
HU Gang, LIU Jian, SHI Lianqiang. THE CHARACTERISTICS OF SUSPENDED DEPOSITS IN THE OFFSHORE AREA OF THE CHANGJIANG ESTUARY DURING FLOOD SEASON[J]. Marine Geology Frontiers, 2011, 27(9): 6-10.
Citation: HU Gang, LIU Jian, SHI Lianqiang. THE CHARACTERISTICS OF SUSPENDED DEPOSITS IN THE OFFSHORE AREA OF THE CHANGJIANG ESTUARY DURING FLOOD SEASON[J]. Marine Geology Frontiers, 2011, 27(9): 6-10.
shu

2008年洪水期长江口滨外区悬浮泥沙特征

  • 1 国土资源部海洋油气资源与环境地质重点实验室, 青岛 266071;

  • 2 青岛海洋地质研究所, 青岛 266071;

  • 3 国家海洋局第二海洋研究所, 杭州 310012

  • 基金项目:

    国家自然科学基金(40806038)

    国土资源部海洋油气资源与环境地质重点实验室开放基金(MRE200916)

    中国科学院海洋地质与环境重点实验室开放基金(MGE2009KG06)

详细信息
    作者简介: 胡刚(1979-),男,在读博士,主要从事河口区水文泥沙过程的研究工作.E-mail:hg_jinan@163.com

  • 中图分类号: P734.21

THE CHARACTERISTICS OF SUSPENDED DEPOSITS IN THE OFFSHORE AREA OF THE CHANGJIANG ESTUARY DURING FLOOD SEASON

  • 1 The Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao 266071, China;

  • 2 Qingdao Institute of Marine Geology, Qingdao 266071, China;

  • 3 The Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

    摘要
  • 河口悬沙属性的现场观测对于泥沙输移和沉积过程研究具有重要的意义,也是河口地貌演变的重要研究内容之一。利用2008年8月河口滨外区纵向3站位同步悬沙和ADP水流观测资料,并结合室内Malvern 2000型激光粒度仪对悬沙进行粒度测试,对研究区域泥沙组成及时空变化规律进行了分析。结果表明,悬浮体浓度在潮周期内随涨落潮变化,悬沙浓度最大一般出现在涨急时刻,纵向上向海方向悬沙浓度依次降低,垂向上表中底悬沙浓度依次增加,且大潮悬浮体浓度小于小潮;悬沙组成以黏土质粉砂为主,平均粒径为6φ,在潮周期内变化不大,物质组成比较稳定;悬沙浓度与流速呈现一定相关性,悬沙浓度与粒度、粒度与流速之间相关性不明显。
    The characteristics of suspended sediments in an estuary are important not only for the research of sediment transportation and deposition, but also for the geomorphological study of the estuarine zone. Based on the data acquired from the in-situ observation in August, 2008, we processed the ADP data and analyzed the grain size of the suspended matter. The variation in suspended sediment was studied in a temporal and spatial framework. The results show that the suspended sediment concentration (SSC) varies not only with the alternation of flood and ebb tides, but also with the alternation of spring and neap tides. The maximum SSC usually appears during the flood peak in general. The SSC is higher in neap tide instead of spring tide.The suspended sediment is mainly composed of muddy silt and remains the same in different tidal cycles.The SSC mainly depends on current speed but not on grain size.
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收稿日期:  2011-02-22

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