| 摘要: |
| 利用2012 年4 月份进行水文调查得到的实测海流数据, 依据多周日观测的准调和分析原理, 对大小门岛海域表层潮流进行调和分析。基于调和分析结果对大小门岛海域潮流和余流特征进行精细化研究。结果表明: 大小门岛海域潮流类型为不正规半日浅海潮流, 大小门岛西部海域受浅水分潮影响最大。整个海域潮流运动形式以往复流为主, 由于受到多股往复流的干涉作用, 大门岛西侧旋转流较强; 实测落潮流要强于涨潮流, 流速在瓯江口外侧达到最大。余流走向存在区域性差异, 小门岛西北、瓯江口内部及黄大峡海域余流方向与涨潮流一致, 其它区域与落潮流一致, 余流流速大小与最大流速分布基本一致。 |
| 关键词: 大小门岛 潮流 余流 |
| DOI：10.11759/hykx20130716001 |
| 分类号: |
| 基金项目:海洋可再生能源专项资金项目(GHME2011CX01) |
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| Characteristics of surface tidal and residual current around the Da-men and Xiao-men islands |
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| Abstract: |
| Based on the field data obtained from the investigation of Da-men-Xiao-men islands in April 2012, we characterized the tidal and residual currents according to the principle of quasi-harmonic. The harmonic analysis results agreed well with the measured results. The results showed the currents around Da-men and Xiao-men islandsarea was dominated by irregular semi-diurnal shallow currents. The proportion reached most at the west of Da-men and Xiao-men islands because of shoal topography. The Da-men and Xiao-men islands were dominated by rectilinear currents, but at the west of Da-men island, it was characterized by strong rotary current due to muti-tide interference effect. The measured data showed that ebb currents were stronger than flood currents. The currents got greatest outside the Oujiang estuary. The residual direction showed regional differences. The residual direction inside the Oujing, near northwest of Xiao-men island and Huang-Da channel was consistent with the flood tide, and other areas were consistent with ebb current. The residual magnitude distribution was similar to maximum speed distribution. |
| Key words: Da-men and Xiao-men islands tide current residual current |
