Seasonal variations in drag coefficient of salt marsh vegetation

被引：2

作者：

Li, Changyang ^{[1
]}

Peng, Zhong ^{[1
]}

Zhao, Ying ^{[1
]}

Fang, Dan ^{[1
]}

Chen, Xianjin ^{[1
]}

Xu, Fan ^{[1
]}

Wang, Xianye ^{[1
]}

机构：

[1] East China Normal Univ, Inst Ecochongming, State Key Lab Estuarine & Coastal Res, Shanghai 200241, Peoples R China

来源：

COASTAL ENGINEERING | 2024年 / 193卷

关键词：

Drag coefficient; Wave attenuation; Seasonal variation; Wave nonlinearity; Salt marsh vegetation; WAVE ATTENUATION; DISSIPATION; IMPACT; STORM; FLOW; NONLINEARITY; FLEXIBILITY; VARIABILITY; DYNAMICS; MOTION;

D O I：

10.1016/j.coastaleng.2024.104575

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Understanding the seasonal variations of vegetation drag coefficients is crucial for improving wave attenuation predictions and adapting to climate impacts. This study explores the seasonal changes in drag coefficients within salt marsh vegetation, using data from a year-long series of field measurements at the Chongming Dongtan Wetland. It uncovers the complex seasonal variations of drag coefficients. Results demonstrate that incorporating a nonlinear equation for characteristic flow velocity and effective vegetation length significantly improves the precision of drag coefficient predictions, ensuring a closer match with field observations. Furthermore, it introduces a refined drag coefficient formula that incorporates adjustments for vegetation stiffness and relative submergence, offering a more accurate representation of the seasonal variability in drag forces exerted by salt marsh vegetation. This enhanced formula is crucial for accurately assessing vegetation's role in wave attenuation, providing critical insights for the design and implementation of coastal defense and wetland conservation initiatives.

引用

页数：15

共 64 条

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