MODELLING THE EFFECT OF COASTLINE ORIENTATION ON STORM EROSION AT THE SYLT ISLAND, NORTH SEA
No. 36v (2020), Full Length Papers
No. 36v (2020)

MODELLING THE EFFECT OF COASTLINE ORIENTATION ON STORM EROSION AT THE SYLT ISLAND, NORTH SEA

Full Length Papers
https://doi.org/10.9753/icce.v36v.papers.50
Published 2020-12-31
  • Pushpa Dissanayake
  • Christian Winter
Pushpa Dissanayake
Christian Winter
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How to Cite

Dissanayake, P., & Winter, C. (2020). MODELLING THE EFFECT OF COASTLINE ORIENTATION ON STORM EROSION AT THE SYLT ISLAND, NORTH SEA. Coastal Engineering Proceedings, (36v), papers.50. https://doi.org/10.9753/icce.v36v.papers.50
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Abstract

The effect of coastline orientation on storm erosion was investigated using a hybrid numerical modelling approach (Delft3D and XBeach) on the convex-shape North Sea coast of Sylt. Storm impacts were simulated using different severity events occurring in a cluster and alone. Both models predicted reasonable wave dynamics (RMSE of wave spectral density 0.45 m2/Hz). XBeach resulted in higher erosion above MSL than Delft3D. High severity events approached the coast from the SW- NW sector (i.e., dominant storm approach on this coast). The convex-shape of the coastline provided however different storm landfall at individual locations along the coast. The coastal stretch from the apex to the North showed high vulnerability to storm erosion with the highest erosion at the apex, when the storm events approach from the northwesterly directions. This coastal stretch draws attention in the application of management strategies to withstand the storm erosion.

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https://doi.org/10.9753/icce.v36v.papers.50
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References

Ahrendt, K. 2001. Expected effect of climate change of Sylt island: results from a multidisciplinary German project, Climate Research 18, 141-146.

Blossier, B., K.R. Bryan, C.J. Daly, and C. Winter. 2017. Spatial and temporal scales of shoreline morphodynamics derived from video camera observations for the island of Sylt, German Wadden Sea. Geo Marine Letters 37/2, 111-123.

Booij, N., R.C. Ris, and L.H. Holthuijsen. 1999. A third-generation wave model for coastal regions, Part I, Model description and validation, J. Geophysical Research 104 (C4), 7649–7666.

Brown, J.M., A.J. Souza, and J. Wolf. 2010. An investigation of recent decadal-scale storm events in the eastern Irish Sea, J. Geophysical Research 115, C05018, doi:10.1029/2009JC005662.

Chu, K., C. Winter, D. Hebbeln, and M. Schulz. 2013. Improvement of morphodynamic modelling of tidal channel migration by nudging, Coastal Engineering 77, 1-13.

Dissanayake, P., J. Brown, and H. Karunarathna. 2015a. Impacts of storm chronology on the morphological changes of the Formby beach and dune system, UK, Nat. Haz. Earth Sys. Sci. 15, 1533-1543.

Dissanayake, P., J. Brown, P. Wisse, and H. Karunarathna. 2015b. Comparison of storm cluster vs isolated event impacts on beach/dune morphodynamics, Estua. Coast and Shelf Sci. 164, 301-312.

Dissanayake, P., J. Brown, P. Wisse, and H. Karunarathna. 2015c. Effect of storm clustering on beach/dune evolution, Marine Geology, doi: 10.1016/j.margeo.2015.10.010.

Dissanayake, P., J. Brown, P. Sibbertsen, and C. Winter. 2019. Role of water level in storm impacts of a hyper-tidal coast, Pro. Coastal Sediments ’19, Tampa, FL, 1249-1259.

Donelan, M. A., H. Hamilton, and W.H. Hui. 1985. Directional spectra of wind-generated waves, Philos. T. Royal Society London A, 315, 509-562.

Esteves, L.S., J.J. Williams, and J.M. Brown. 2011. Looking for evidence of climate change impacts in the eastern Irish Sea, Nat. Hazards Earth Syst. Sci., 11, 1641–1656.

Guisado-Pintado, E. and D.W. Jackson. 2019. Coastal Impact From High-Energy Events and the Importance of Concurrent Forcing Parameters: The Cases of Storm Ophelia (2017) and Storm Hector (2018) in NW Ireland, Front. Earth Sci.,17:11, doi: 10.3389/feart.2019.00190.

Hasselmann, K., T. P. Barnett, F. Bouws, H. Carlson, D.E. Cartwright, K. Enke, J.A. Ewing, H. Gienapp, D.E. Hasselmann, P. Krusemann, A. Meerburg, P. Muller, D.J. Olbers, K. Richter, W. Sell, and H. Walden. 1973. Measurements of windwave growth and swell decay during the Joint North Sea Wave Project (JONSWAP), Deutches Hydrographisches Institut, A8, 1–95.

Lesser, G., J.A. Roelvink, J.A.T.M. Van Kester, and G.S. Stelling. 2004. Development and validation of a three-dimensional morphological model, Coastal Engineering 51, 883-915.

Nair, M.A. and V.S. Kumar. 2017. Wave spectral shapes in the coastal waters based on measured data off Karwar on the western coast of India, Ocean Science 13, 365-378.

Pender, D. and H. Karunarathna. 2013. A statistical-process based approach for modelling beach profile variability, Coastal Engineering 81, 19-29.

Roelvink, D., R. McCall, S. Mehvar, K. Nederhoff, and A. Dastgheib. 2018. Improving predictions of swash dynamics in XBeach: The role of groupiness and incident-band runup, Coastal Engineering 134, 103-123.

Roelvink, J.A., A.J.H.M. Reniers, A.R. van Dongeren, J.S.M. van Thiel de Vries, R.T. McCall, and J. Lescinski. 2009. Modelling storm impacts on beaches, dunes and barrier islands, Coastal Engineering 56 (11–12), 1133–1152.

Smallegan, S.M., J.L. Irish, Ap R. Van Dongeren, and J.P. Den Bieman. 2016. Morphological response of a sandy barrier island with a buried seawall during Hurricane Sandy, Coastal Engineering 110, 102-110.

Soulsby, R. 1997. Dynamics of marine sands, A manual for practical applications, Thomas Telford.

Stelling, G.S. and J.J. Lendertse. 1991. Approximation of Convective Processes by Cyclic ACI methods, Proceeding 2nd ASCE Conference on Estuarine and Coastal Modelling, Tampa, 1991.

Van Ormondt, M., T.R. Nelson, C.J. Hapke, and D. Roelvink. 2020. Morphodynamic modelling of the wilderness breach, Fire Island, New York. Part I: Model set-up and validation, Coastal Engineering 157, 103621.

Vousdoukas, I., R. Ranasinghe, L. Mentaschi, T.A. Plomaritis, P. Athanasiou, A. Luijendijk, and L. Feyen. 2020. Sand coastlines under threat of erosion, Nature Climate Change 10, 260-263.

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