南通典型断面盐沼植被对潮间带潮流泥沙输运的影响研究  

Research on influence of typical section salt marsh vegetation of Nantong on tidal sediment transport in intertidal zone

作　　者：付赛乾 罗锋 陈治澎[1] 李彬 Fu Saiqian;Luo Feng;Chen Zhipeng;Li Bin(College of Harbor Costal and Offshore Engineering,Hohai University,Nanjing 210098,China;Ocean and Coastal Engineering Research Institute,Hohai University,Nantong 226000,China)

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098 [2]河海大学海洋与近海工程研究院,江苏南通226000

出　　处：《能源与环保》2023年第2期65-71,78,共8页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：江苏省海洋科技创新项目(JSZRHYKJ202105);南通社会民生科技计划项目(MS12022009,MS22022082,MS22022083);国家重点研发计划“蓝色粮仓科技创新”重点专项(2020YFD0900703)。

摘　　要：在人类活动和自然灾害的双重作用下,我国部分海岸带生态系统已表现出明显的脆弱性。盐沼植被具有消浪弱流和保滩促淤等功效,盐沼植被引种也成为了海岸生态修复和恢复中关键举措之一,研究盐沼植被引种具有重要的实际意义。依据研究区域的实测地形及潮流泥沙等数据资料,对盐沼植被引种前后的潮流泥沙进行了数学建模,研究了植被引种对潮流泥沙的影响。研究结果表明,盐沼植被引种后,流速、含沙量、悬移质瞬时输运量、推移质瞬时输运量等量值上均有不同程度的减小,减小幅度大都超过50%;在盐沼前缘向岸一定距离内,盐沼植被具有明显的促淤效果;盐沼植被引种会改变潮滩局部地貌,植被密度、植被分布区域增大均会引起深度较大、宽深比较小的潮沟发育,而植被分布区域增大作用下的潮沟发育更为显著。Under the dual effects of human activities and natural disasters,some coastal ecosystems in China have shown obvious vulnerability.The salt marsh vegetation has the effects of dissipating waves and weakening currents,protecting beaches and promoting siltation.The introduction of salt marsh vegetation has also become one of the key measures in coastal ecological restoration and restoration.The research on the introduction of salt marsh vegetation has important practical significance.Based on the measured topography and tidal sediment data in the study area,the mathematical model of tidal sediment before and after the introduction of salt marsh vegetation is established,and the influence of vegetation introduction on tidal sediment is studied.The results showed that after the introduction of salt marsh vegetation,the flow velocity,sediment concentration,suspended matter instantaneous transport and bedload instantaneous transport decreased in varying degrees,and the decrease was more than 50%.Within a certain distance from the front edge of the salt marsh to the shore,the salt marsh vegetation has obvious siltation promoting effect.The introduction of salt marsh vegetation will change the local landform of the tidal flat.The increase of vegetation density and vegetation distribution area will lead to the development of tidal creeks with larger depth and smaller width and depth,while the development of tidal creeks with the increase of vegetation distribution area is more obvious.

关 键 词：盐沼植被引种 潮流泥沙 盐沼潮滩系统 数值模拟 植被扩张 

分 类 号：P737.12[天文地球—海洋地质]