人工岛建设对区域水动力及海床冲淤影响数值模拟研究  

Numerical simulation on regional hydrodynamic force and seabed erosion and siltation effects from construction of artificial islands

作　　者：左书华[1] 张征[1] 李蓓[1] 

机构地区：[1]交通运输部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456

出　　处：《中国港湾建设》2015年第10期1-5,共5页China Harbour Engineering

基　　金：中央级公益性科研院所基本科研业务费项目(TKS130102;TKS150210)

摘　　要：建立波浪潮流共同作用下水动力及海床冲淤变化数学模型,并基于实测水文泥沙资料对模型进行了验证,运用该模型对海花岛工程建设后水动力、海床冲淤变化进行了研究。研究表明,海花岛的建设无疑是缩窄了过水通道面积,挤压了水流,使得局部水流流速有所增大;3 a期内,海花岛与小铲礁之间的水域总体较工程前呈现为微冲的趋势,幅度在0.03-0.12 m;洋浦港区航道外段有微弱冲刷,对内航道淤积基本没有影响;南沙滩区域淤积在0.06-0.18 m;海花岛之间的水道均呈现出淤积趋势,幅度在0.06-0.30 m;在50 a一遇SW大浪作用24 h后周围海域海床淤积幅度在0.05-0.15 m/d。Combining the effects of tides and waves, we set up a mathematical model to simulate the hydrodynamic force and the change of seabed erosion and siltation, and verified the model by the measured hydrology and sediment data. Using the model, we studied the hydrodynamic force and seabed erosion and siltation effects from the construction of Haihua artificial island project. The results show that the construction of Haihua Island narrowes the area of water channel, squeezes the flow, and makes the local flow velocity increase; the water between Haihua Island and Xiaochanjiao shows a slightly eroded trend with the value from 0.03 m to 0.12 m within three years; the outer channel of Yangpu Port is slightly erosded, however it has no effect on siltation of the internal channel; the seabed deposits with the value from 0.06 m to 0.18 m in the South Shoal; the waterways between the islands are deposited with the value from 0.06 m to 0.30 m; the seabed is deposited in the surrounding sea area of the Haihua Island by the SW wave of 50 years return period, and the deposited rate is 0.05-0.15 m/d.

关 键 词：人工岛 水动力 冲淤 数值模拟 

分 类 号：U612[交通运输工程—船舶及航道工程]