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首页> 外文期刊>Estuarine Coastal and Shelf Science >Field measurements of tidal flows affected by mangrove seedlings in a restored mangrove swamp, Southern China
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Field measurements of tidal flows affected by mangrove seedlings in a restored mangrove swamp, Southern China

机译：中国南方红树林沼泽中受红树林幼苗影响的潮汐流的现场测量

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摘要

Current rehabilitation efforts to restore degrading mangroves mainly include afforestation with nursery grown plants. Hydrodynamic processes associated with sediment deposition and erosion play major roles in determining seedling establishment success. However, only a few detailed reports of the influence of seedlings on tidal flows are available. In situ measurements were conducted in this study to compare tidal flows between a restored mangrove flat covered by seedlings and a bare mudflat, located within Yueqing Bay, southeast China. High frequency 3D flow velocity variations and vegetation attributes were recorded on comparative sites to determine the effects of vegetation characteristics on flows at a small-scale. The vertical velocity profile displayed an S-shape distribution within the seedlings that was closely related to the vertical distribution of vegetation biomass. However, the turbulent kinetic energy within the seedlings varied minimally in the vertical direction, except for an abrupt increase at the top of the canopy. Comparing the mangrove seedling site and the bare mudflat site, the horizontal flow magnitude in the mangrove seedlings was reduced only limitedly from the mudflat, while the turbulence kinetic energy density had been noticeably reduced. Thus, mangrove seedlings were found to mainly modify the vertical velocity profile and the turbulent energy magnitude in terms of their influences on tidal flows. These findings are able to provide more detailed mechanisms for biogeomorphological modeling and further apply into mangrove restoration.
机译：当前恢复退化的红树林的恢复努力主要包括对苗圃植物进行造林。与沉积物沉积和侵蚀相关的水动力过程在确定幼苗建立成功中起主要作用。但是，仅有少数关于幼苗对潮汐流影响的详细报道。在这项研究中进行了实地测量，以比较位于中国东南部乐清湾内的一个被幼苗覆盖的红树林与一个裸露的泥滩之间的潮汐流。在比较点上记录了高频3D流速变化和植被属性，以确定小范围内植被特征对流量的影响。垂直速度剖面显示出幼苗内的S形分布，这与植被生物量的垂直分布密切相关。但是，除了在树冠顶部突然增加外，幼苗内的湍流动能在垂直方向上变化很小。比较红树林幼苗和裸露泥滩的位置，红树林幼苗中的水平流幅度仅从泥滩降低，而湍流动能密度则显着降低。因此，发现红树林幼苗对潮汐流的影响主要改变了垂直速度分布和湍流能级。这些发现能够为生物地貌学建模提供更详细的机制，并进一步应用于红树林恢复。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2020年第5期|106561.1-106561.8|共8页
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    East China Normal Univ Sch Ocean Sci State Key Lab Estuarine & Coastal Res Shanghai 200241 Peoples R China;

    Minist Nat Resources China Inst Oceanog 2 Hangzhou 310012 Peoples R China;

    East China Normal Univ Sch Ocean Sci State Key Lab Estuarine & Coastal Res Shanghai 200241 Peoples R China|Nanjing Univ MOE Key Lab Coast & Isl Dev Nanjing 210023 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Mangrove seedlings; Tidal flow; Energy dissipation; Vertical flow structure;

    机译：红树林幼苗;潮流能量耗散;垂直流结构;

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