A study of impact of the reclamation and artificial island projects on tidal currents and sediment concentration in radial sand ridge field of the South Yellow Sea  

人工岛工程对南黄海辐射沙脊群海域潮流泥沙影响研究（英文）

作　　者：赵强[1,2] 何琴燕[1] 杨耀芳[1] 黄秀清[1] 

机构地区：[1]国家海洋局宁波海洋环境监测中心站,浙江宁波315040 [2]中国海洋大学物理海洋实验室,山东青岛266003

出　　处：《Marine Science Bulletin》2015年第1期71-85,共15页海洋通报（英文版）

摘　　要：The two-dimensional hydrodynamic model, MIKE21, is applied to simulate the tidal currents and sediment concentration in the radial sand ridges of the South Yellow Sea. Results are in accordance with in situ observations. Then the variations of tidal currents and suspended sediment concentration caused by reclamation and artificial islands projects are simulated. The results show that the impacts are limited around the project areas. After the projects, the fan-shaped, Jianggang centered tidal current pattern would be replaced by a pattern which is formed by two tidal paths. One locates at the Xiyang channel in north-south direction, and the other locates at the Huangshayang channel in east-west direction. The reclamation of Tiaozini separates the waters into south portion and north portion. The changes of sediment concentrations coincide with those of currents. Both the sediment concentrations and tidal currents increase at the northwest of Dongsha and the south of Gaoni, while both decrease at the north and south of Tiaozini, and the east and southwest of Dongsha.本文采用MIKE21二维水动力模型模拟了南黄海辐射沙脊群海域的潮流形态和含沙量,模拟结果与实测数据基本一致。在此基础上,模拟计算了围填海工程后辐射沙脊群海域的潮流和含沙量变化。结果显示工程对潮流和含沙量的影响主要出现在工程区附近。围填海工程使原本以弶港为中心呈扇形辐聚、辐散的潮流格局有所改变,形成东沙岛西侧南北向和高泥岛南侧东西向的两条潮流通道,并在一定程度上分割了条子泥南北两侧的水体。工程后含沙量的变化与平均流速的变化基本一致,在流速变大的东沙岛西北侧和高泥岛南侧海域,含沙量显著升高;在流速变小的条子泥南北两侧、东沙岛东侧及西南侧,含沙量显著降低。

关 键 词：radial sand ridges RECLAMATION artificial island tidal currents suspended sediment concentration numerical modeling 

分 类 号：P731.2[天文地球—海洋科学] P756.8