人工岛对金梦海湾水体交换的影响-中国环境科学.pdf

中国环境科学 2019,39(2) ：757~767 China Environmental Science 人工岛对金梦海湾水体交换的影响 匡翠萍 1,俞露露 1,顾 杰 2*,董智超 1,宋竑霖 1,朱 磊 3 (1. 同济大学土木工程学院水利工程系,上海 200092 ；2.上海海 洋大学海洋生态与环境学院,上海 201306 ；3.河北省地矿局第八地质大队,河北 秦皇岛 066001) 摘要：为研究金梦海湾人工岛的不同布局对周围海域水动力及水体交换的影响,基于 MIKE 软件建立三维和二维潮流模型以及保守物质输运模型,运用 欧拉法计算水体滞留时间,从整体和分区二个方面分析人工岛对水体交换的影响机制.结果表明:海螺岛工程起到分流､导流的作用,提升了金梦海湾的 水体交换能力,水体交换率提升 10.17%;海螺岛和进岛路的联合作用,使金梦海湾形成一个水体交换能力较差的半封闭式水域,水体交换率下降 7.73%; 在建设人工岛时保留潮汐通道有助于该区域的水体交换,进岛路的去除为汤河口和金梦海湾近岸增加一条潮汐通道,水体交换能力增加 17.90%;在弱潮 流地区,需考虑余流的作用.金梦海湾区域的余流小,潮流弱,因此保守物质滞留时间长,水体交换缓慢,水体的自净能力低. 关键词：水体交换；水动力；人工岛；金梦海湾 中图分类号：X145 文献标识码：A 文章编号：1000-6923(2019)02-0757-11 1 1 2* 1 Influences of artificial island on water exchange of Jinmeng Bay. KUANG Cui-ping , YU Lu-lu , GU Jie , DONG Zhi-chao , SONG Hong-lin1, ZHU Lei3 (1.College of Civil Engineering, Tongji University, Shanghai 200092, China ；2.College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China ；3.The Eighth Geological Brigade, Hebei Geological Prospecting Bureau, Qinhuangdao 066001, China). China Environmental Science, 2019,39(2)：757~767 Abstract ：To study the influences of the different layouts of artificial island on the hydrodynamic and water exchange in the Jinmeng Bay, based on MIKE software, a three and a two-dimensional hydrodynamic and conservative substance transport model were established, and Euler method was used to calculate the residence time. The influence mechanism of artificial island on water exchange was analysed from the entire region and several sub-regions. It reveals that: Conch Island played the roles of guiding and diversion flow, which improves the water exchange c