Wave attenuation by flattened vegetation (Scirpus mariqueter)

被引：12

作者：

Ma, Yuxi ^{[1
]}

Zhu, Longhuan ^{[2
]}

Peng, Zhong ^{[1
,3
]}

Xue, Liming ^{[1
]}

Zhao, Wenzhen ^{[1
]}

Li, Tianyou ^{[1
]}

Lin, Shiwei ^{[1
]}

Bouma, Tjeerd J. ^{[4
]}

Hofland, Bas ^{[5
]}

Dong, Chuning ^{[6
]}

Li, Xiuzhen ^{[1
]}

机构：

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

[2] Michigan Technol Univ, Great Lakes Res Ctr, Houghton, MI 49931 USA

[3] East China Normal Univ, Inst Ecochongming, Shanghai, Peoples R China

[4] Netherlands Inst Sea Res NIOZ, Dept Estuarine & Delta Syst, Yerseke, Netherlands

[5] Delft Univ Technol, Fac Civil Engn & Geosci, Delft, Netherlands

[6] Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul Eng, Nanjing, Peoples R China

来源：

FRONTIERS IN MARINE SCIENCE | 2023年 / 10卷

基金：

中国国家自然科学基金;

关键词：

Scirpus mariqueter; wave attenuation; flattened vegetation; wave attenuation indicator; flume experiment; natural coastal protection; empirical model; SALT-MARSH VEGETATION; DISSIPATION; PROPAGATION; MANGROVE; DYNAMICS; DRIVERS; MUDFLAT; MODEL; DRAG;

D O I：

10.3389/fmars.2023.1106070

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

With the capacity to reduce wave energy and trap sediment, Scirpus mariqueter has become an important native species of annual grass for ecology restoration at the Yangtze Estuary in eastern China. Due to seasonal variances of biophysical characteristics, S. mariqueter usually bends and breaks in winter, resulting in flattened stems that may reduce its wave attenuation capacity. To investigate the effects of vegetation flattening on wave attenuation, a set of flume experiments were conducted for flattened and standing vegetation under different wave conditions. The model vegetation was designed to represent the wilted S. mariqueter collected in winter with dynamic similarity. Results showed that the wave damping coefficient for flattened vegetation (beta(F)) was 33.6%-72.4% of that for standing vegetation (beta(S)) with the same vegetation length. Both beta(F) and beta(S) increased with wave height but decreased with water depth. A wave attenuation indicator (WAI) was defined to generate empirical formulas for beta(S) and beta(F) as well as their ratio beta(F)/beta(S). The empirical formulas were then applied to modify the existing standing vegetation-based wave attenuation model for flattened vegetation and performed successfully. Understanding the wave attenuation characteristics of flattened vegetation is essential for the management of ecological restoration and coastal protection.

引用

页数：14

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