岸线变化对钦州湾水动力环境的影响  

Effects of Shoreline Change on Hydrodynamic Environment in Qinzhou Bay

作　　者：牙韩争 许尤厚[2] 李谊纯[1] 董德信[1] YA Hanzheng;XU Youhou;LI Yichun;DONG Dexin(Guangxi Key Laboratory of Marine Environmental Science,Guangxi Academy of Sciences, Nanning, Guangxi,530007,China;Ocean College,Qinzhou University,Qinzhou,Guangxi, 535000,China)

机构地区：[1]广西科学院广西近海海洋环境科学重点实验室,广西南宁530007 [2]钦州学院海洋学院,广西钦州535000

出　　处：《广西科学》2017年第3期311-315,322,共6页Guangxi Sciences

基　　金：广西科学院基本科研业务费项目(13YJ22HY07);广西近海海洋环境科学重点实验室开放基金项目(GXKLHY13-01;GXKLHY14-01);广西高校科研项目(2013YB252)资助

摘　　要：【目的】分析岸线变化对钦州湾水动力环境的影响,为钦州湾海岸线开发、海洋环境保护提供科学依据。【方法】结合2004年及2012年海图、卫星影像资料等资料,采用数值模拟的方法对钦州湾2004年—2012年间岸线变化造成潮流、纳潮量、水交换能力的变化进行计算。【结果】岸线变化后,三墩公路顶端附近海域流速增大0.2m/s,犀牛脚附近下降0.1m/s,三墩公路两侧涨潮时潮流流向由东南向变为西南向和正北向;大、小潮期间,海域纳潮量分别下降-1.50×10~8 m^3和-0.29×10~8 m^3,下降幅度分别约为总量的10.3%和10.9%;水体半交换时间由27d延长至28d。【结论】岸线变化对钦州湾水动力环境有一定的影响,岸线开发利用应充分考虑岸线变化对海洋环境的影响。【Objective】To provide the scientific basis for shoreline development and marine envi-ronmental protection^the effects of shoreline change on hydrodynamic environment in QinzhouBay were analyzed.[MethodsJBased on charts and satellite images during the year of2004and2012?the change of tidal current?tidal prism?and water exchange ability of Qinzhou Bay werecalculated by numerical simulation method.[Resultsl After the change of the shoreline,the flowvelocity of the waters near the top of the Sandun highway was increased by0.2m/s?and de-creased by0.1m./s near the Xiniujiao.The current direction changed from southeast tosouthwest and north near Sandun in flood tide.The tidal prism of Qinzhou Bay decreased about-1.50X108m3in spring tidal and about-0.29X10sm3in neap tidal,the decrease amplitudeaccounted for about10.3%and10.9%of total tidal prism respectively.The half exchangetime of water was extended from27d to28d.[Conclusion】The shoreline change has a certaineffect on hydrodynamic environment in QinzhouBay.The coastland development and utilizationshould fully consider the impact of shorelinechanges on marine environment.

关 键 词：钦州湾 岸线变化 水动力 

分 类 号：P732.1[天文地球—海洋科学]