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Effect of a seagrass (Posidonia oceanica) meadow on wave propagation
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Effect of a seagrass (Posidonia oceanica) meadow on wave propagation
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Journal Article
Effect of a seagrass (Posidonia oceanica) meadow on wave propagation
2012
Overview
We demonstrate the utility of using the equivalent bottom roughness for calculating the friction factor and the drag coefficient of a seagrass meadow for conditions in which the meadow height is small compared to the water depth. Wave attenuation induced by the seagrassPosidonia oceanicais evaluated using field data from bottom-mounted acoustic doppler velocimeters (ADVs). Using the data from one storm event, the equivalent bottom roughness is calculated for the meadow ask
s~ 0.40 m. This equivalent roughness is used to predict the wave friction factorƒ
w, the drag coefficient on the plant,C
D, and ultimately the wave attenuation for other storms. Root mean squared wave height (H
rms) is reduced by around 50% for incident waves of 1.1 m propagating over ~ 1000 m of a meadow ofP. oceanicawith shoot density of ~600 shoots m−2.
Publisher
Inter-Research
Subject
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