摘要
通过建立水动力学模型、物质输运模型和年龄模型,对渤海辽东湾潮汐驱动下的水动力状况和污染物输移扩散过程进行了数值模拟研究。结果表明,辽东湾海域入海径流对辽东湾整体流场和水交换过程影响不大,其主要影响集中在河口附近海域。在潮汐的驱动下,辽东湾内形成了复杂的环流结构,辽东湾南北海域分别存在顺时针、逆时针的环流,而辽东湾湾口又存在逆时针环流,使得水交换能力较弱,对辽东湾向外海的物质输运产生不利影响,湾顶附近海域的物质主要通过扩散过程与外海进行交换。年龄模型的计算结果表明,辽东湾河流入海污染物在河口附近停留时间较长,向远区的输运需要较长时间。入海污染物的影响具有局地性,对局部海域水质尤其是辽东湾湾顶的水质会产生不利影响。
In this paper,by establishing a hydrodynamic model,a material transport model and an age model,a numerical simulation study was carried out on the hydrodynamic conditions and the process of pollutant transport and diffusion driven by the tides in the Liaodong Bay of the Bohai Sea.The results show that the runoffs have little effect on the flow field and water exchange process in the Liaodong Bay,and their impacts are mainly concentrated near estuaries.Driven by the tides,a complex circulation structure is formed in the Liaodong Bay.There are clockwise and counterclockwise circulations in the Liaodong Bay.A counterclockwise circulation is formed at the mouth of the Liaodong Bay,adversely affecting the transportation of materials from the bay to the open sea,and the materials in the top of the bay are exchanged with open sea mainly through diffusion process.The result of the age model shows that the pollutant from runoffs in the Liaodong Bay stays for a long time near the estuary,and takes a longer time to be transported to distant area.The pollutant entering the sea has adverse impacts on the water quality of local sea areas,especially on the water quality at the top of the Liaodong Bay.
作者
李东辉
晁雷
赵丰泽
雷坤
李原仪
LI Dong-hui;CHAO Lei;ZHAO Feng-ze;LEI Kun;LI Yuan-yi(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Department of Mechanics,Tianjin University,Tianjin 300072,China;Second Institute of Oceanography Chinese Research Academy of Environmental Sciences,Beijing 100012,China;School of Marine Science and Technology,Tianjin University,Tianjin 300072,China)
出处
《海洋科学进展》
CAS
CSCD
北大核心
2022年第3期423-434,共12页
Advances in Marine Science
基金
国家重点研发计划项目--辽东湾污染防治与生态环境修复关键技术研究(2019YFC1407700)。
关键词
辽东湾
水交换
输移扩散
水体年龄
Liaodong Bay
water exchange
transport and diffusion
water age
