摘要
采用有限体积近岸海洋模型FVCOM,基于渤海2004和2014年的岸线地形数据,构建渤海2个年份的三维潮汐潮流数值模式;通过数值模拟研究,探讨了渤海岸线地形变化对潮波系统和潮流性质的影响。数值模拟结果表明:岸线地形变化后,半日分潮潮时在渤海湾、莱州湾和渤海中部东南海域提前,在辽东湾和渤海中部西北海域滞后;振幅在渤海湾及辽东湾增大,在莱州湾及渤海中部减小;位于秦皇岛和黄河口的半日分潮无潮点位置分别向西南和东南方向移动。渤海绝大部分海域全日分潮潮时提前,振幅增大,位于渤海海峡的全日潮无潮点位置向东移动。潮流性质系数在莱州湾增大,在渤海其他大部分海域减小,渤海规则半日潮流海区范围略有增加,不规则半日潮流海区范围相应减少。
A numerical model was established based on FVCOM,to investigate the impact imposed on the Bohai Sea tidal wave system and tidal current character by coastline and topography changes from 2004 to 2014.The numerical simulation results indicated that tidal hours of semidiurnal constituents moved up in Bohai Bay,Laizhou Bay and southeastern of the central Bohai Sea while lagged behind in Liaodong Bay and northwestern of the central Bohai Sea.Tide amplitudes of semidiurnal constituents enhanced in Bohai Bay and Liaodong Bay while deceased in Laizhou Bay and the central Bohai Sea.The amphidromic points of semidiurnal constituents located in Qin Huangdao and Yellow River mouth moved southwestward and southeastward respectively.Tidal hours of diurnal constituents moved up and the amplitudes enhanced in most of the Bohai Sea,while the amphidromic point located in the Bohai Straits shifted eastward.The tidal current characteristic coefficient increased in Laizhou Bay while decreased in the rest of the Bohai Sea.The range of the regular semidiurnal current enlarged slightly while the irregular semi-diurnal current decreased correspondingly.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第12期1-7,101,共8页
Periodical of Ocean University of China
基金
国家海洋局北海分局海洋科技项目(2015B07)资助
关键词
潮波系统
潮流性质
岸线变化
渤海
数值模拟
tidal wave system
tidal current character
coastline change
the Bohai Sea
numerical simulation
