| 摘要: |
| 为了对凤凰岛近岸海域的工程建设和岸滩防护提供支持, 通过凤凰岛东侧近岸海域的表层沉积物粒度组成及粒度参数的分析, 结合Flemming三角图示法和Gao-Collins二维的“粒度趋势分析”方法,研究了该区域沉积环境及沉积物运移趋势。结果显示该区有5种沉积物类型, 呈条带状分布, 以黏土质粉砂为主体; 研究区沉积物整体较细, 分选较差, 偏态多为正偏; 研究区整体水动力较弱, 表层沉积物中各级配泥沙分布与不同区域沉积环境关系密切。该区表层沉积物输运主要受潮流和波浪控制, 北部区域沉积物运移主要受潮流控制, 运移方向呈现由海向岸运输, 南部区域沉积物运移受潮流波浪共同作用, 运移方向呈现与岸线大致平行向东北方向运移, 金沙滩、银沙滩沉积物动力过程主要受波浪控制, 近岸处运移趋势呈现由岸向海运输, 离岸处运移趋势由海向岸。 |
| 关键词: 粒度分析 运移趋势 凤凰岛 |
| DOI：10.11759/hykx20140512003 |
| 分类号: |
| 基金项目:海洋公益性行业科研专项(201005009) |
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| Grain-size characteristics of sediments and transport patterns in the eastern sea area of the Fenghuangdao Island |
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SONG Sheng,FENG Xiu-li,LIU Jie,QUAN Yong-zheng,XIAO Xiao
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| Abstract: |
| A study of the region’s sedimentary environment and migration trend is conducted through an analysis of the particle size component and parameters of surface sediment in the offshore zone to the east of the Fenghuangdao Island using a combination of the Flemming triangle diagram method and the Gao-Collins two-dimensional “particle size trend analysis” method. Results show that the region has four different types of sediments that present in a banding distribution, with clayey silt as the main part. The sediments in the research region are generally fine and the size classification is poor. In addition, most of the skewnesses are positively biased. The hydrodynamic force in the research region is generally weak, and the different levels of sediment distribution in surface sediments are closely related to the sedimentary environments of different regions. Surface sediment migration in the region is mainly controlled by tidal currents and waves. In addition, sediment migration in the northern region is mainly controlled by tidal currents and its migration direction is from sea to shore. Moreover, sediment migration in the southern region is controlled by the combined action of tidal currents and waves, and its migration direction is northeastward, which is almost parallel to shoreline. Furthermore, dynamic processes involved in creating golden beach and silver beach sediments are mainly controlled by waves. The migration trend inshore is from shore to sea, and the offshore migration trend is from sea to shore. |
| Key words: grain-size analysis transport patterns the Fenghuangdao Island |
