THREE-LAYER ANALYTICAL SOLUTION FOR WAVE ATTENUATION BY SUSPENDED AND NONSUSPENDED VEGETATION CANOPY

Proceedings of the International Conference on Coastal Engineering

Longhuan Zhu¹ 

[1] University of Maine

关键词: wave attenuation;    suspended vegetation canopy;    vegetation;    analytical solution;    wave;    vegetation interaction;   

DOI  :  10.9753/icce.v35.waves.27

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A generalized three-layer analytical solution for the wave attenuation by suspended and non-suspended vegetation canopy is developed in this study. The analytical solution reduces to the two-layer analytical solution by Kobayashi et al. (1993) for the non-suspended vegetation canopy rooted at the sea bed. The present theory is verified using laboratory experiments and field observations of a suspended and non-suspended as well as emerged and submerged vegetation canopy. The wave attenuation increase with the drag coefficient, blade diameter and length, canopy density and length, the elevation of the bottom of the canopy and the incident wave height. The influences of wave frequency and water depth on wave attenuation are more complex. They affect the wave attenuation mainly by changing the wave flow velocity encountered by the vegetation canopy. As a result, the canopy vertical position has significant impact on the relationship between the wave attenuation and wave frequency.

【 授权许可】

CC BY