WAVE ENERGY DISSIPATION IN ARBITRARILY SHAPED HARBOURS OF VARIABLE DEPTH

J.K. Kostense, K.L. Meijer, M.W. Dingemans, A.E. Mynett, P. van den Bosch

Abstract


A finite element model for combined refraction-diffraction problems of linear water waves has been extended to include the effect of various dissipative mechanisms on wave excitation response in harbours of arbitrary shape and variable depth. Especially, the effects of bottom friction, partial absorption along the harbour, contours, and transmission through permeable breakwaters have been considered. Although, within the mild slope approximation, the model is valid for arbitrary wave lengths, in this paper its effectiveness for harbour design applications is demonstrated for long wave induced resonance phenomena. For this purpose a realistic harbour geometry has been selected. A hydraulic scale-model of this harbour enabled experimental verification of the computational results.

Keywords


energy dissipation; harbor; variable depth; wave energy

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