INFRAGRAVITY PERIOD OSCILLATIONS IN A CHANNEL HARBOR NEAR A RIVER MOUTH

Florian Bellafont, Denis Morichon, Volker Roeber, Gaël André, Stéphane Abadie

Abstract


Port of Bayonne, located in SW France, is a channel harbor situated near the river mouth of the Adour. Long-period oscillations have repeatedly caused snapping of mooring lines of berthed ships and have led to wave resonances in an adjacent marina (seiche). To investigate mechanisms for generation of theses oscillations, a field campaign was carried out during a one-year return-period storm (Hs = 6 m and Tp = 15 s): four pressure sensors were deployed inside the port. To complement the data and to better understand the governing processes that lead to the wave transformations in Port of Bayonne, the storm event was computed with the Boussinesq-type model, BOSZ. The data confirm the model results, which show generation of long infragravity (IG) waves by the incident swell around the harbor entrance and free propagation of these waves without amplification over far distances inside Port of Bayonne. Excited by these long waves, resonance oscillations are only noticeable in a small enclosed marina. Though the IG-waves are not causing substantial changes to the water level along the harbor channel, they are suspected to excite the ships’ eigen modes, which consequently results in mooring problems.

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References


S. Abadie, R. Butel, H. Dupuis, and C. Brière. Paramètres statistiques de la houle au large de la côte sud-aquitaine. Comptes Rendus Geoscience, 337(8):769–776, 2005.

G. J. Arcement and V. R. Schneider. Guide for selecting manning’s roughness coeffcients for natural channels and flood plains, 1989.

C. Augris and P. Clabaut. Cartographie géologique des fonds marins côtiers: exemples le long du littoral français. Editions Quae, 2001.

J. Berkhoff. Computation of combined refraction—diffraction. In Coastal Engineering 1972, pages 471– 490. 1973.

X. Bertin, A. de Bakker, A. van Dongeren, G. Coco, G. André, F. Ardhuin, P. Bonneton, F. Bouchette, B. Castelle, W. C. Crawford, M. Davidson, M. Deen, G. Dodet, T. Guérin, K. Inch, F. Leckler, R. McCall, H. Muller, M. Olabarrieta, D. Roelvink, G. Ruessink, D. Sous, Éléonore Stutzmann, and M. Tissier. Infragravity waves: From driving mechanisms to impacts. Earth-Science Reviews, 177:774 – 799, 2018. ISSN 0012-8252. doi: https://doi.org/10.1016/j.earscirev.2018.01.002. URL http://www.sciencedirect.com/science/article/pii/S0012825217303239.

P. Bonneton and D. Lannes. Recovering water wave elevation from pressure measurements. Journal of Fluid Mechanics, 833:399–429, 2017.

N. Booij, L. Holthuijsen, and R. Ris. The" swan" wave model for shallow water. In Coastal Engineering 1996, pages 668–676. 1997.

T. Gierlevsen, M. Hebsgaard, and J. Kirkegaard. Wave disturbance modelling in the port of sines, portugal– with special emphasis on long period oscillations. In Proceedings International Conference on Port and Maritime R&D and Technology, Singapore, 29-13 October 2001, 2001.

M. Guerrini, G. Bellotti, Y. Fan, and L. Franco. Numerical modelling of long waves amplification at marina di carrara harbour. Applied Ocean Research, 48:322–330, 2014.

L. H. Holthuijsen. Waves in oceanic and coastal waters. Cambridge university press, 2010.

J.-J. Lee and X. Xing. Computer modeling for harbor planning and design. In Handbook of Coastal and Ocean Engineering, pages 695–722. World Scientific, 2010.

M. S. Longuet-Higgins and R. Stewart. Radiation stress and mass transport in gravity waves, with application to ‘surf beats’. Journal of Fluid Mechanics, 13(4):481–504, 1962.

O. Nwogu. Alternative form of boussinesq equations for nearshore wave propagation. Journal of waterway, port, coastal, and ocean engineering, 119(6):618–638, 1993.

M. Okihiro, R. Guza, and R. Seymour. Excitation of seiche observed in a small harbor. Journal of Geophysical Research: Oceans, 98(C10):18201–18211, 1993.

A. B. Rabinovich. Seiches and harbor oscillations. Handbook of coastal and ocean engineering, pages 193–236, 2009.

F. Raichlen. Harbor resonance. Estuary and coastline hydrodynamics, 1966.

V. Roeber and J. D. Bricker. Destructive tsunami-like wave generated by surf beat over a coral reef during typhoon haiyan. Nature Communications, 6:7854 EP –, 08 2015.

V. Roeber and K. F. Cheung. Boussinesq-type model for energetic breaking waves in fringing reef environments. Coastal Engineering, 70:1–20, 2012.

V. Roeber, K. F. Cheung, and M. H. Kobayashi. Shock-capturing boussinesq-type model for nearshore wave processes. Coastal Engineering, 57(4):407–423, 2010.

G. Symonds, D. A. Huntley, and A. J. Bowen. Two-dimensional surf beat: Long wave generation by a time-varying breakpoint. Journal of Geophysical Research: Oceans, 87(C1):492–498, 1982.

S. team et al. Swan user manual. Delft University of Technology. The Netherlands, 2007.

E. F. Thompson and L. L. Hadley. Numerical modeling of harbor response to waves. Journal of coastal research, pages 744–753, 1995.

R. E. Thomson and W. J. Emery. Data analysis methods in physical oceanography. Newnes, 2014.

D. T. Thotagamuwage and C. B. Pattiaratchi. Observations of infragravity period oscillations in a small marina. Ocean Engineering, 88:435–445, 2014a.

D. T. Thotagamuwage and C. B. Pattiaratchi. Influence of o shore topography on infragravity period oscillations in two rocks marina, western australia. Coastal Engineering, 91:220–230, 2014b.

H. L. Tolman et al. User manual and system documentation of wavewatch iii tm version 3.14. Technical note, MMAB Contribution, 276:220, 2009.

W. Van Der Molen, P. Monardez, and A. Van Dongeren. Numerical simulation of long-period waves and ship motions in tomakomai port, japan. Coastal Engineering Journal, 48(01):59–79, 2006.




DOI: https://doi.org/10.9753/icce.v36.papers.8