Nicholas Grunnet, Sten Esbjørn Kristensen, Nils Drønen, Rolf Deigaard, Caroline Tessier, Nicolas Forain


A recently developed long-term morphological modeling concept is applied to evaluate the impact of nourishment schemes. The concept combines detailed two-dimensional morphological models and simple one-line models for the coastline evolution and is particularly well suited for long-term simulation. This hybrid concept is here applied to study the decadal morphological evolution of several nourishment scenarios in Dunkirk, France. The morphological simulations successfully allowed identifying the impact of beach versus shoreface nourishment scenarios on the background morphological behavior of the study site. This study strongly indicates that the hybrid model may be used as an engineering tool to predict shoreline response following the implementation of a nourishment project


morphological modeling; nearshore bars; beach nourishment

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Deigaard, R., Fredsoe, J. and Hedegaard, I.B., (1986), Mathematical Model for Littoral Drift, Journal of Waterway, Port, Coastal and Ocean Engineering, Volume 112, Issue 3, 351-369, ASCEhttp://dx.doi.org/10.1061/(ASCE)0733-950X(1986)112:3(351)

Drønen, N., Kristensen, S., Taaning, M., Elfrink, B. and Deigaard, R., (2011), Long term modeling of shoreline response to coastal structures, Proceedings of Coastal Sediments, ASCE, 965-978.

Fredsoe, J., (1984), Turbulent boundary layer in wave-current motion. Journal of Hydraulic Engineering, 110 (8), 1103-1119.http://dx.doi.org/10.1061/(ASCE)0733-9429(1984)110:8(1103)

Grunnet, N., Walstra, D.J.R. and Ruessink, B.G., (2004), Process-based modeling of a shoreface nourishment, Coastal Engineering, Volume 51, Issue 7, 581-607.http://dx.doi.org/10.1016/j.coastaleng.2004.07.016

Héquette, A., Hemdane, Y. and Anthony, E.J., (2008), Sediment transport under wave and current combined flows on a tide-dominated shoreface, northern coast of France, Marine Geology, 249: 226-242.http://dx.doi.org/10.1016/j.margeo.2007.12.003

Kristensen, S., Deigaard, R., Taaning, M., Fredsoe, J., Drønen, N. and Jensen, J., (2010). Long term morphological modeling, Proceedings of the 32nd International Conference on Coastal Engineering, ASCE, Shanghai, China, ISSN 2156-1028.

Kristensen, S.E., Deigaard, R., Drønen, N., Fredsoe, J. and Luger, S., (2012), Morphological modelling of the response to a shipwreck – a case study at Cape Town, Proceedings of the 33rd International Conference on Coastal Engineering, ASCE, Santander, Spain.

Kristensen, S.E., Drønen, N., Deigaard, R. and Fredsoe, J. (2013a), Hybrid morphological modelling of shoreline response to a detached breakwater, Coastal Engineering, 71:13–27.http://dx.doi.org/10.1016/j.coastaleng.2012.06.005

Kristensen, S.E., Drønen, N., Deigaard, R. and Fredsoe, J. (2013b), Hybrid morphological modelling of the response to groyne fields, Intended for publishing in Coastal Engineering.

Latteux, B. (1995), Techniques for long-term morphological simulation under tidal action, Marine Geology, 126:129-141.http://dx.doi.org/10.1016/0025-3227(95)00069-B

DOI: http://dx.doi.org/10.9753/icce.v33.sediment.63