摘要
随着珠三角经济的快速发展,在伶仃洋西岸建港的需求日益迫切,但伶仃洋西滩因受蕉门、洪奇沥和横门等径流水道影响,水浅滩宽,沙多流散,建港条件很差.通过对当地水沙特性和岸滩演变的分析,认为"弱流少沙"环境是在伶仃洋西滩建深水港的关键条件,如位于蕉门口外龙穴岛东侧的广州港南沙港区,利用其北端礁群掩护,避免了涨落潮主流直接过境,近岸水域流弱沙少,即使在零米高滩上开挖深水港池,回淤也并不太严重.数学模型计算结果表明,随着码头建设往下游延伸,已建港区"弱流少沙"环境进一步改善,港池回淤亦趋减轻.
With the rapid development of economic and social conditions in the Pearl River delta day by day, the needs of harbor construction at Lingdingyang West Bay become significant. However, due to the influence of Jiaomen mouth, Hongqimen mouth and Hengmen mouth , Lingdingyang West Bay, with shallow water, broad bank, abundant sand and rambling current is not a good place for constructing harbor. Through a detailed analysis on the characteristics of water, sand and bank in Lingdingyang West Bay, this paper considers the ＂weak-flow and low-sediment concentration＂ as the key condition of deep water harbor construction in Lingdingyang West Bay. For example, located in the east of Longxue island, the Guangzhou Harbor Nan Sha Estuary takes the advantage of its northern reef shelter to avoid the direct passage of the main tidal current, and consequently the water in shore has faint current and little sand; even if digging a deep water harbor on the shallows, little siltation can be found. Numerical simulation shows that as the harbor construction extends downstream, the constructed harbor＇s ＂weak- flow and low-sediment concentration＂ condition is much more improved, with less silt. The building of ten deep- berths in projects I and II of the Nansha Harbor is taken as an example.
出处
《水利水运工程学报》
CSCD
北大核心
2010年第1期9-15,共7页
Hydro-Science and Engineering
关键词
弱流少沙
建港条件
挖槽
回淤
伶仃洋西岸
weak-flow and low-sediment concentration
conditions for constructing harbor
dredge
silt
Lingdingyang West Bay
