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主要采用二维潮波、泥沙输运途径的数值模拟,定量地展示了泥沙在乐清湾内的输运途径和沉降过程。模拟结果表明,乐清湾大致以10m等深线为界,其东部的涨潮流主要来自玉环岛与横趾山之间的深槽;水流在一周日内的轨迹为一宽约1km的狭带;此流态有利于泥沙向南的净输运,从而有利于此海域深水航道的维持。10m等深线以西水流轨迹为一较宽的带状结构,有利于泥沙向西、西北的净输运。华歧潮滩附近水流运动轨迹利于泥沙向北、向西的净输运,从而有利于华歧潮滩的发育。此外,本文还定性讨论了楚门潮滩特征的成因,主要是漩门口堵截前丰富的湾外泥沙以及驻波型潮波与漏斗状地形。
The main use of two-dimensional tidal wave, sediment transport numerical simulation to quantitatively demonstrate the sediment transport in the Yueqing Bay and settlement process. The simulation results show that the Yueqing Bay is roughly bounded by the 10m isobath and the tidal current in the eastern part of the island mainly comes from the deep trough between Yuhuan Island and the Yonhap mountains. The water track within a week is a strip with a width of about 1km. The flow regime is conducive to the net transport of sediment to the south, thus contributing to the maintenance of the deepwater channel in this area. The water flow trajectory west of the 10m isobath is a wide band structure that is beneficial to the net transport of sediment to the west and northwest. Huakudao beach near the flow trajectory conducive to the sediment to the north, west of the net transport, which is conducive to Huadu tidal flat development. In addition, the paper also qualitatively discussed the causes of the Chumen tidal flats characteristics, mainly the abundant sediment outside the bay and the standing waves and the funnel-shaped topography before the swirling of the swirling gate.