NONLINEAR BEHAVIOUR OF TSUNAMI-LIKE SOLITARY WAVE OVER SUBMERGED IMPERMEABLE STRUCTURES OF FINITE WIDTH

Agnieszka Strusinska-Correia; Hocine Oumeraci

doi:10.9753/icce.v33.currents.6

No. 33 (2012), Swash, Nearshore Currents, and Long Waves

No. 33 (2012)

NONLINEAR BEHAVIOUR OF TSUNAMI-LIKE SOLITARY WAVE OVER SUBMERGED IMPERMEABLE STRUCTURES OF FINITE WIDTH

Swash, Nearshore Currents, and Long Waves

https://doi.org/10.9753/icce.v33.currents.6

Published 2012-12-14

Agnieszka Strusinska-Correia⁺⁻
Hocine Oumeraci⁺⁻

Agnieszka Strusinska-Correia

Technische Universität Braunschweig

Hocine Oumeraci

Technische Universität Braunschweig

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Keywords

solitary wave
impermeable submerged structure
soliton fission
wave breaking
wave transmission
reflection
energy dissipation

How to Cite

Strusinska-Correia, A., & Oumeraci, H. (2012). NONLINEAR BEHAVIOUR OF TSUNAMI-LIKE SOLITARY WAVE OVER SUBMERGED IMPERMEABLE STRUCTURES OF FINITE WIDTH. Coastal Engineering Proceedings, 1(33), currents.6. https://doi.org/10.9753/icce.v33.currents.6

Abstract

A study on the nonlinear transformation of a tsunami-like solitary wave over impermeable submerged structures of finite widths was performed to examine the feasibility of the integration of such structures into tsunami coastal protection systems. Laboratory experiments with varying structure geometry and incident wave conditions were conducted to determine wave evolution modes, incipient wave breaking and the number of solitons resulting from the wave fission process. The latter was found to be constant for a given relative structure submergence depth and width, irrespective of incident wave conditions, and tended to increase for smaller freeboards and larger barrier widths. The hydraulic performance of the structure, predicted numerically for more realistic tsunami conditions by means of the Boussinesq-type model COULWAVE, was determined in terms of wave transmission, wave reflection and wave energy dissipation coefficients. The rate of wave transmission and energy dissipation was dependent on the breaking conditions over the structure crest: the weakest wave attenuation (approximately 10%) corresponded to nonbreaking waves, while the highest wave damping (about 25%) was achieved for the widest relative structure width (B/Li = 1.0) and the smallest relative structure submergence depth (dr/h = 0.3) investigated.

https://doi.org/10.9753/icce.v33.currents.6

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NONLINEAR BEHAVIOUR OF TSUNAMI-LIKE SOLITARY WAVE OVER SUBMERGED IMPERMEABLE STRUCTURES OF FINITE WIDTH

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