基于数值模拟的大连湾水交换能力研究  

Numerical simulation of water exchange in the Dalian bay of China

作　　者：曹雪峰[1,2] 张宇铭 张淑芳[1] 史文奇[1] 李庆杰[3] 石洪源 王平[1] 王玉[1] 赵骞 韩成伟[1] CAO Xue-feng;ZHANG Yu-ming;ZHANG Shu-fang;SHI Wen-qi;LI Qing-jie;SHI Hong-yuan;WANG Ping;WANG Yu;ZHAO Qian;HAN Cheng-wei(National Marine Environmental Monitoring Center,Dalian 116023,China;Guangxi Key Laboratory of Marine Environmental Science,Beibu Gulf Marine Research Center,Guangxi Academy of Sciences,Nanning 530007,China;Yantai Marine Environment Monitoring Center,Yantai 264006,China;Ludong University,School of Civil Engineering,Yantai 264025,China)

机构地区：[1]国家海洋环境监测中心,辽宁大连116023 [2]广西科学院北部湾海洋研究中心,广西近海海洋环境科学重点实验室,广西南宁530007 [3]国家海洋局烟台海洋环境监测中心站,山东烟台264006 [4]鲁东大学,土木工程学院,山东烟台264025

出　　处：《海洋环境科学》2020年第1期114-120,共7页Marine Environmental Science

基　　金：国家海洋环境监测中心博士科研启动(2018-A-19);辽宁省博士科研启动基金计划项目(2019-BS-092);广西近海海洋环境科学重点实验室开放基金(合同编号:GXKLHY18-01);国家重点研发计划(2017YFF0206904);中国工程院咨询研究项目(2018-XY-30)

摘　　要：基于无结构三角网格的FVCOM海洋模式,以K1、O1、P1、Q1、M2、S2、N2和K2 8大分潮调和常数为驱动,建立了大连湾海域的高分辨率三维水动力数值模型。通过与实测数据的对比,该模型可以较好地模拟大连湾海域的水动力特征。在此基础上叠加DYE-RELEASE模块,模拟了大连湾整体和分区域的水交换过程,以半交换时间作为评价指标分析了水交换能力。模拟结果显示:示踪物质释放初始时刻对大连湾整体的半交换时间有影响,平均半交换时间为9.6 d^12.3 d。对比大、小潮期间的物质输运过程,大潮期间海湾平均示踪物质浓度下降速度更快,水交换能力更强。大连湾的半交换时间的空间分布特征表现为距离湾口越近,半交换时间越短;相同距离下,西南部较东北部半交换时间短。大连湾中部水交换能力最强,其次是红土堆子湾,甜水套湾和臭水套湾最差。Based on an unstructured grid and finite-volume coastal ocean model that contained eight main tidal components of K1、O1、P1、Q1、M2、S2、N2 and K2,this paper developed a three-dimensional hydrodynamic model with high-resolution in Dalian bay of China.By comparing the simulated elevation and current data with the observed data,the model could well reflect the hydrodynamic characteristics.Furthermore,DYE-RELEASE module was merged into model to simulate water exchange process and half-life time was used to evaluate the capacity of the whole and sub-regions of Dalian bay.The simulation results indicates that,initial time of tracer release has an impact on the half-life time.On the average,half-life time is 9.6 d^12.3 d in Dalian bay.The concentration decreased more rapidly in spring tide period than in neap tide period so that water exchange capacity in spring tide period is stronger.The half-life time distribution is characterized by the shorter distance from the mouth to the bay and the shorter half-life time.Under the same distance,the half-life time of the southwest is shorter than that of the northeast.The water exchange capacity is characterized by that,the strongest is the central part of Dalian bay,followed by Hongtuduizi bay and the weakest is Tianshuitao and Choushuitao bays.

关 键 词：大连湾 数值模拟 DYE-RELEASE模块 半交换时间 水交换能力 

分 类 号：P731.2[天文地球—海洋科学]