石岛海域潮流通道及岬湾的泥沙动力机制研究  

Study on Dynamic Mechanism of Sediment Movement in Tidal Channel and the Firth Inside in Shidao Marine Area

作　　者：朱子晨 胡泽建[1] 刘建强[1] 张永强[1] 熊丛博[1] 边淑华[1] ZHU Zi-chen;HU Ze-jian;LIU Jian-qiang;ZHANG Yong-qiang;XIONG Cong-bo;BIAN Shu-hua(The First Institute of Oceanography,SO)

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2018年第3期435-448,共14页Advances in Marine Science

基　　金：国家自然科学基金项目--粉砂海岸典型剖面极端海况泥沙运动观测及其动力机制研究(41276084)

摘　　要：石岛海域潮流通道的动力条件强劲,潮流通道向岸一侧的黑泥湾敞开性高,波浪作用明显,水道、岬湾底质类型包含砾石、砂、粉砂、淤泥各种类型,因而泥沙运动具有特殊性。基于FVCOM的泥沙模块,采用拟合希尔兹曲线改良模型的泥沙起动条件,同时采用多组分泥沙百分含量分布来反映不同地区的底质类型,研究黑泥湾海域夏季泥沙运动规律。模型参数采用2010年沉积物粒度分析资料率定,潮汐、潮流、波浪、悬沙模型采用2006年观测资料及遥感图验证,冲淤模型采用1980—2006年测深资料进行趋势比对。结果显示,黑泥湾整体呈弱侵蚀状态,潮流通道西侧出现N—S向带状侵蚀区,半月潮周期内最大冲刷深度3.5mm。潮流通道水动力条件强,但沉积物成分较粗,侵蚀较弱。镆铘岛东侧近岸海域冲淤变化复杂,冲刷或淤积趋势交替占据优势,半月潮周期内,潮差高于1.4m时潮流较强,冲刷为主导趋势,潮差下降后,非本地起动的泥沙逐渐在此淤积,淤积为主导趋势。The hydrodynamic condition is strong in the tidal channel in Shidao sea area.Heini Bay is located on the Shoreward side of the tidal channel,which is impacted by the wave action significantly.The sediment in the study area contains all of the types,which are gravel,sand,silt and mud.As a result,the sediment movement in the area is specific.Sediment movement in the area in summer was studied by applying the sediment module of FVCOM.The sediment incipient motion in the model was modified by the adoption of fitted Shields diagram.And the fraction distributions of multi-components were adopted to reflect the sediment distribution.The parameters calibration was based on the grain size analysis of sediment in the year of 2010.The simulated tide,current,wave and suspended sediment concentration were validated by the observational data in 2006 and the remote sensing map.The simulation of erosion and deposition was validated by the bathymetric data in 1980 and 2006.The results indicate that sediment in Heini Bay was in slightly erosional state.An north-south zonal erosion area occurred on the west side of tidal channel,and the maximum erosion thickness was 3.5 mm in the simulated fortnightly tide period.The channel was in a low state of erosion with high current speed because of coarse sediment on seabed.The sediment transport in east side of Moye Island was complicated,with erosional state dominanting when tidal range higher than 1.4 m,and depositional state dominating when tidal range lower than 1.4 m,in the simulated period.

关 键 词：泥沙冲淤 波流共同作用 潮流通道 FVCOM 石岛海域 

分 类 号：P736[天文地球—海洋地质]