WAVE ENERGY DISSIPATION IN KELP VEGETATION

Alfonse Dubi, Alf Torum

Abstract


A laboratory experiment was carried out to investigate wave energy dissipation in a coastal kelp field of Laminaria hyperborea with a purpose of finding the damping rate. Parameters measured were wave heights at 8 locations along the direction of wave propagation, forces on artificial kelp plants, and velocities in between the plants in 4 different water depths. It was found that in 4, 6, 8 and 10 meter water depths, the damping coefficient was 0.0094, 0.0032, 0.0014 and 0.0005m"1 respectively. Results show that the damping rate varies with population density, size of plant, water 'depth and wave period.

Keywords


wave energy; dissipation; kelp; vegetation

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