连云港近岸海域沉积物特征与沉积环境

范恩梅; 陈沈良; 张国安

doi:10.3724/SP.J.1140.2009.02033

连云港近岸海域沉积物特征与沉积环境

华东师范大学河口海岸国家重点实验室, 上海 200062

基金项目:

河口海岸学国家重点实验室科研业务项目(2008KYYW06)

我国近海海洋综合调查与评价项目(908-01-ZH2,908-02-03-04)

详细信息

作者简介:
范恩梅(1982-),女,硕士生,主要从事海岸动力沉积与工程应用研究,E-mail:enmfan@163.com

中图分类号: P737.2
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- 文章访问数: 1673
- HTML全文浏览量: 190
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出版历程
- 收稿日期: 2008-12-12
- 修回日期: 2009-02-23

SEDIMENT CHARACTERISTICS AND SEDIMENTARY ENVIRONMENT IN LIANYUNGANG COASTAL WATERS

State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China

摘要

摘要: 根据连云港地区近岸海域的表层沉积物分析结果,运用Flemming的三角图示对沉积环境进行划分,并在此基础上结合沉积物结构、地形及水动力条件,探讨了研究区域沉积物特征及沉积环境。结果表明,研究区域沉积物以潮流作用为主,沉积环境可划分为近岸和远岸沉积环境。近岸沉积环境,由于潮流由外海向岸逐渐减小,向上部搬运的泥沙粒径越来越小,因此该区域泥沙颗粒较细,主要为黏土质粉砂和砂-粉砂-黏土;远岸沉积环境,潮流流速很大,可掀动并搬运较细颗粒泥沙,使得远岸区域有进一步粗化的趋势。
- 沉积物 /
- 粒度参数 /
- 沉积环境 /
- 水动力条件 /
- 连云港
Abstract: Based on the analytic results of bottom sediment samples, combined with sediment texture,topography and hydrodynamic conditions, a new triangular diagram advanced by Flemming is applied to reveal the sediment characteristics and sediment environment in the Lianyungang coast. The results indicate that the study area which is mainly affected by tidal current can be divided into two sedimentary environments:the nearshore zone and the offshore zone. In the nearshore zone, the tidal current decreases its strength from sea to land. As a result, sediments conveyed by tidal current become less concentrated and the grain size of the sediments gets finer. The sediments are dominated by clayey silt and sand-silt-clay. In the offshore zone, due to the strong tidal current, fine sediments can be lifted and transported to the nearshore zone, and sediments in this zone have a tendency of getting coarser.
- sediment characteristics /
- grain-size parameters /
- sediment texture /
- hydrodynamic conditions /
- Lianyungang

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