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渤海海域冰水共存期的波能流密度推算
张娜1,2, 王立涛1, 耿姗姗3, 张庆河2, 尤再进4, 李帅1, 许宁5, 许钊1
1.天津城建大学 天津市软土特性与工程环境重点实验室 天津 300384;2.天津大学 水利工程仿真与安全国家重点实验室 天津 300072;3.国家海洋信息中心 天津 300171;4.大连海事大学 港口与航运安全协创中心 辽宁大连 116026;5.国家海洋环境监测中心 辽宁大连 116023
摘要:
为给寒区海域的波浪能估算提供科学依据,提出一种合理推算冰水共存海域波浪条件及波能流密度的方法,该方法将海冰模型与水动力学模型耦合模拟得到的冰浓度以线性修正函数的方式纳入波浪模型的海面摩阻风速方程中,并基于MCT (model coupling toolkit)耦合器将海冰模型、水动力学模型与波浪模型进行实时耦合。基于该方法模拟了渤海冬季寒潮大风期间的海冰以及波能流密度的演化。模拟结果表明,在2012年2月5~8日寒潮大风期间,结冰区域占到渤海总面积的1/3,约有76%的渤海海域的平均波能流密度受海冰影响减小,其中辽东湾近岸的波能流密度平均受冰影响最多减小了100%,而渤海湾和莱州湾近岸受冰影响最多分别减小了60%和50%。即使是无冰覆盖的老铁山水道,其波能流密度的最大值也受冰影响减少了14%。耦合模拟可以更为准确地对渤海冬季的波能流密度分布进行评估,为波浪能发电厂选址提供依据。
关键词:  渤海  海冰模型  SWAN模型  FVCOM模型  MCT耦合器  海面摩阻风速  实时耦合  波能流密度
DOI:10.11693/hyhz20210700159
分类号:P731.22
基金项目:NSFC-山东联合重点基金,U1806227号;国家自然科学基金项目,51509177号,51978440号;大连市支持高层次人才创新创业项目,2019RJ07号;辽宁省科技计划项目,2021JH2/10300004号;自然资源部海洋环境信息保障技术重点实验室开放基金;天津大学水利工程仿真与安全国家重点实验室开放基金,HESS-1912号;天津市研究生科研创新项目资助,2020YJSS081号。
ESTIMATION OF WAVE ENERGY FLUX DURING ICE WATER COEXISTENCE IN THE BOHAI SEA
ZHANG Na1,2, WANG Li-Tao1, GENG Shan-Shan3, ZHANG Qing-He2, YOU Zai-Jin4, LI Shuai1, XU Ning5, XU Zhao1
1.Tianjin Key Laboratory of Soft Soil Characteristics & Engineering Environment, Tianjin Chengjian University, Tianjin 300384, China;2.State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;3.National Marine Data and Information Service, Tianjin 300171, China;4.Centre for Ports and Maritime Safety, Dalian Maritime University, Dalian 116026;5.National Marine Environmental Monitoring Center, Dalian 116023, China
Abstract:
To select a candidate site for wave-power plant in the Bohai Sea, a method for estimating wave conditions and wave energy flux in ice-water coexistence sea area was proposed by coupling the sea ice model, hydrodynamic model, and wave model are coupled in real time based on MCT (Model Coupling Toolkit) coupler, in which the ice concentration obtained from the coupling simulation of sea ice model and hydrodynamic model is incorporated into the sea surface friction wind speed equation of wave model in the form of linear correction function. With this method, the evolution of sea ice and wave energy flux in the Bohai Sea during cold and strong winds in winter were simulated. The simulated results show that during the cold wave gale period from February 5 to 8, 2012, the frozen area accounted for 1/3 of the total area of the Bohai Sea, and about 76% area of the average wave energy flux in the Bohai Sea were reduced by sea ice; the average wave energy flux in the Liaodong Bay were reduced by up to 100% due to ice, and the coastal areas of Bohai Bay and Laizhou Bay were most affected by ice by up to 60% and 50%, respectively. The maximum wave energy flux was reduced by 14% even though the Laotieshan Channel was not covered by ice. The method can more accurately evaluate the wave energy flux distribution in the Bohai Sea in winter, and provide a basis for the site selection of wave-power plant.
Key words:  the Bohai Sea  sea ice model  SWAN model  FVCOM model  MCT coupler  wind friction velocity  real-time coupling  wave energy flux
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