围垦工程地理位置对杭州湾水沙环境的影响  

Influences of reclamation location on the water and sediment environment in Hangzhou Bay

作　　者：李莉[1,2] 叶涛焱 张璐 姚炎明[1,2] 夏乐章[1,2] LI Li;YE Taoyan;ZHANG Lu;YAO Yanming;XIA Yuezhang(Ocean College,Zhejiang University,Zhoushan 316021,China;State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography,SOA,Hangzhou 310058,China;China Energy Engineering Group Anhui Electric Power Design Institute,Hefei 230013,China)

机构地区：[1]浙江大学海洋学院,浙江舟山316021 [2]国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室,浙江杭州310058 [3]中国能源建设集团安徽省电力设计院有限公司,安徽合肥230013

出　　处：《哈尔滨工程大学学报》2019年第11期1870-1875,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(41606103);浙江省自然科学基金项目(LQ16D060002);NSFC-浙江两化融合联合基金(U1709204);舟山市校合作项目(2018C81036)

摘　　要：针对围垦工程地理位置对河口水沙环境特征的影响问题,本文基于杭州湾三维水沙耦合数值模型,分析杭州湾邻近海域不同地理位置的围垦工程,对局地和全湾的潮差、流速、悬沙浓度等水沙环境特征的影响。结果显示:杭州湾湾顶(澉浦)以上区域的围垦对杭州湾水动力、悬沙浓度的影响最大,且影响程度自湾顶至湾口逐渐降低;M 2、M 4分潮振幅在湾顶的局地变幅分别高达15%、-37%,M 2、M 4分潮最大流速在湾顶的局地变幅分别高达-39%、44%,对应的悬沙浓度减幅高达40%。其他区域围垦工程实施后,全湾的潮差、流速及悬沙浓度变化较为均匀,且变幅较小。不同区域的围垦对杭州湾悬沙净通量的影响均较为明显,其中湾顶以上区域的围垦工程影响最为显著。各区域围垦工程对杭州湾水沙环境特征参数的影响具有叠加效应。Aiming at the influence of reclamation projects geographical location on the water and sediment environment characteristics of estuaries,a three-dimensional numerical model for the coupling of water and sediment at the Hangzhou Bay(HZB)was established to examine the effect of reclamation in different geological locations on the water and sediment environment characteristics,such as tidal range,current velocity,and suspended sediment concentration(SSC),in the local area and the whole bay.According to the model results,the reclamation above the head of HZB had the greatest impact on the hydrodynamics and SSC of the bay.The magnitudes of the impacts gradually decreased from the head to the mouth of the bay.The M 2 and M 4 amplitude/velocity changed by 15%/-37%and-39%/44%,respectively,and the corresponding SSC reduced by 40%at the head of HZB in the local area.After the reclamation projects in other areas were completed,the tidal range,velocity,and SSC of the whole bay had a relatively uniform change with a small variation.Reclamation in different areas had a significant influence on the net suspended sediment flux in HZB,with reclamation projects above the head of the bay having the greatest impact.The influence of reclamation projects in different areas on the characteristic parameters of water and sediment at HZB has a superimposed effect.

关 键 词：水环境变化 围垦位置 悬沙通量 水沙耦合数值模型 杭州湾 悬沙浓度 净输沙 

分 类 号：TV92[水利工程—水利水电工程] TV148.1