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作 者:谢滢芳 孟艳秋[1] 童朝锋[1,2] 高祥宇[3] XIE Ying-fang;MENG Yan-qiu;TONG Chao-feng;GAO Xiang-yu(College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China;Engineering Research Center of Dredging Technology of Ministry of Education, Hohai University,Nanjing 210098, China;Key Laboratory of Port, Waterway and Sedimentation Engineering, Ministry of Transport,Nanjing Hydraulic Research Institute,Nanjing 210029,China)
机构地区:[1]河海大学港口海岸与近海工程学院,南京210098 [2]河海大学疏浚技术教育部工程研究中心,南京210098 [3]南京水利科学研究院港口航道泥沙工程交通行业重点实验室,南京210029
出 处:《水道港口》2021年第2期174-185,共12页Journal of Waterway and Harbor
基 金:国家重点研发计划项目(2017YFC0405400);国家自然科学基金重点项目(51339005);中央高校基本科研业务费专项资金资助(B200204036)。
摘 要:采用二维潮流泥沙数学模型和悬沙通量机制分解法,探究多通道狭长型海湾沈家门渔港悬沙输移规律及输沙机制,并分析其对海湾疏浚工程的响应。结果表明,受岛屿阻滞和地形限制,海湾泥沙输移主要由潮流驱动,潮流泥沙的输移规律表现出极强的复杂性。净输沙趋势主要由欧拉余流和斯托克斯余流共同作用的平流输沙主导,含沙量滞后引起的潮泵效应对净输沙影响有限;疏浚工程引起的水深变化主要改变了欧拉余流而影响净输沙,浚深越大,欧拉余流输沙越强,其对净输沙影响越大;反映净输沙强度的悬沙通量不对称性与受水深主控的欧拉余流输沙关系密切,水深越大,欧拉余流在平流输沙所占比重越大,其相关性越强。The two-dimension tidal sediment mathematical model and suspended sediment flux mechanism decomposition method were used to explore the suspended sediment transport law and dynamic mechanism and to analyse their response to the dredging in multi-channel strait type bay,Shenjiamen fishing port.It turned out that the sediment transport in the bay was driven by tidal current,and the law of tidal sediment transport was extremely complex on account of island block and topography constraints.The trend of sediment transport was mainly dominated by the advection of Euler residual current and Stokes residual current.The effect of tidal pump sediment transport caused by the lag effect of sediment concentration on net sediment transport was limited.The change of water depth caused by dredging engineering mainly affected the net sediment transport by changing the Euler residual current.The greater the dredging depth was,the greater the sediment transport volume of Euler residual current was,and the greater the impact on net sediment transport was.In addition,the correlation between per unit width suspended sediment flux and the asymmetry of suspended sediment flux,which reflected the degree of net sediment transport,was also affected by Euler residual current dominated by water depth.The larger the water depth was,the greater the proportion of Euler residual current in advection sediment transport was,and the stronger the correlation was.
分 类 号:U616[交通运输工程—船舶及航道工程]
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