仙草潭修造船工程对附近水域影响数值分析

Numerical analysis of effect on nearby waters by ship building-repairing located on Xiancaotan

利用平面二维浅水潮波方程,在对实测资料良好验证的基础上,得到舟山海区较为符合实际的流场,并分析了仙草潭修造船工程对周边海区水流、泥沙的影响及污水排放引起的水质变化。结果表明:围堤东南侧及#1码头西北侧流速增大,围堤及码头附近的其余水域流速减小;冲淤平衡后高鳖山码头和材料码头处的最大淤积量可达2.0m,需根据工程需要进行疏浚,不影响航道及其它码头的正常运营;污染物排放对敏感点几乎无影响,但应坚决避免石油事故排放的发生以保证海区水质。

Using two-dimensional shallow-water tidal equation,on the basis of model verification against the field measured data,we achieved the real tidal flow field of Zhoushan,and analyzed the effect of Xiancaotan ship building-repairing engineering on the flow and silt in the nearby sea area and the change of water quality resulting from the sewage discharge.The result shows that the flow velocity in the southwest of levees and the northwest of No.1 pier region increases,while that in the other regions decreases;the maximum siltation volume near Gaobieshan pier and the material pier under the balance of scouring and silting reaches 2.0 m,so sometimes it needs dredging to guarantee the normal operation of the channel and other piers;the discharging of waste water from the project has little effect on the nearby sea,but the accident discharge of oil must be avoided to ensure the water quality.