摘要
采用 1999年 1～ 2月实测水文泥沙资料 ,1996年 10月底质调查资料以及 1998年水下地形测图 ,对洋山海区岛屿间水流、泥沙及水下地貌特征进行研究。分析表明 ,洋山海域属淤泥质海岸带的中等潮差近岸水域 ,缘于基岩为主体的岛屿与大流速的水流间的相互作用 ,其基本特征为大流速、多通道、高含沙量以及浅滩 (岛屿 )与深槽间布的水下地形 ,从潮量对比看 ,其主要潮汐通道南北岛链间通道为涨、落潮流共同作用且以落潮流为主的通道 ,小洋山 -镬盖塘通道为涨潮流通道 ,镬盖塘 -大岩礁通道为落潮流通道。基于以上认识 ,港口整体布局类型可分为人工岛型和单通道型 ,而布置起步工程时 ,应注意其附近小洋山 -镬盖塘通道以涨潮流为主的特性 ,为减少对原始流场影响 ,以布置在小洋山岛西南侧为佳。
Using in-situ data of current and suspended sediment concentration(SSC) obtained from January to February in 1999, surface sediment samples taken in October in 1996 and the subaqueous topographic map sounded in 1998 in Yangshan sea area, the author analyses the main characteristics of current, sediment and subaqueous topography, which includes high-speed current, multi-channel, high suspended sediment concentration and an interval distribution of deep troughs and shallow shoals due to the interaction between rocky islands and tidal currents. Among the main tidal channels, the channel between the island chains is a channel under an alternate effect of flood and ebb currents with ebb current predominating, the channel between Xiaoyangshan island and Huogaitang island is a flood-dominated one and the channel between Hougaitang island and Dayanjiao island is an ebb-dominated one. According to the above-mentioned study, the overall port planning should adopt an artificial island type on one-channel type, and the first phase project should be arranged along the south-west side of Xiaoyangshan island due to the flood-dominating character of the channel between Xiaoyangshan island and Hougaitang island so as to maintain the original current field to the most possible extent.
出处
《海洋工程》
CSCD
北大核心
2001年第1期88-93,共6页
The Ocean Engineering
