华东地质2025，Vol.46Issue(4)：467-478,12.DOI:10.16788/j.hddz.32-1865/P.2025.02.004
辽河口盐沼植被区水动力过程及悬浮泥沙截留的数值模拟研究
Numerical simulation for the hydrodynamic process and suspended sediment trapping in the salt marsh vegetation zone of the Liao River Estuary
摘要
Abstract
The coastal wetland is covered by abundant salt marsh vegetation such as Suaeda salsa and Ph-mites australis,but there is still a shortage of quantitative evidence of the effect of salt marsh vegetation on hydro-dynamics,sediment transport and accretion in the coastal wetland area now.Based on the Delft3D hydrodynamic and sediment model and taking the estuary wetlands as the case study object,this paper quantitatively investigat-ed how Suaeda salsa and Phmites australis plants communities influenced on the hydrodynamic characteristics of the watershed,sediment transport and deposition in the wetlands of the Liao River Estuary by means of numerical simulation methods.The results show that the salt marsh vegetation has a weak effect on the tidal levels during the flood and ebb tides,and a more obvious effect on the tidal current,and there are distinct differences in the influ-ence of various vegetation types on the tidal velocity,and the Phmites australis plant has a greater attenuation ef-fect on the tidal velocity than that of Suaeda salsa vegetation.The interception capacity of suspended sediments by salt marsh vegetation in different tidal periods shows great differences.The interception rate of suspended sedi-ments by salt marsh vegetation is greater than that in the bare beach area.The interception amount of suspended sediments was expressed as:the neap period＜middle tide period＜spring tide period.The deposition of sus-pended sediments causes the intertidal beach topography to show an accretion trend.It can be seen that the salt marsh vegetation in the Liao River Estuary can effectively accelerate the deposition of the beach and stabilize the beach landform.关键词
辽河口/Delft3D模型/潮滩湿地/盐沼植被/泥沙运输/数值模拟Key words
the Liao River/Delft3D model/the tidal wetlands/the salt marsh vegetation/sediment trans-portation/numerical simulation分类
天文与地球科学引用本文复制引用
LI Qiuyi,LANG Zixuan,CAO Xinyu,ZHANG Mingliang..辽河口盐沼植被区水动力过程及悬浮泥沙截留的数值模拟研究[J].华东地质,2025,46(4):467-478,12.基金项目
国家自然科学基金"复杂波流环境中盐沼湿地的水沙动力过程及地貌演化机理研究(编号:52471270)"、辽宁省属本科高校基本科研业务费专项资金"辽河口及临近海域污染物迁移转化及陆海响应机制研究(编号:LJ232410158063)"和大连海洋大学基本科研业务经费"辽河口及临近海域污染物迁移转化及陆海响应机制研究(编号:2024JBPTZ003)"项目联合资助. （编号:52471270）
