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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 11 | Copyright

Special issue: 14th Plinius Conference and MEDEX Final Conference

Nat. Hazards Earth Syst. Sci., 14, 2993-3004, 2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 17 Nov 2014

Research article | 17 Nov 2014

Hydro-morphodynamic modelling in Mediterranean storms – errors and uncertainties under sharp gradients

A. Sánchez-Arcilla, M. García-León, and V. Gracia A. Sánchez-Arcilla et al.
  • Laboratori d'Enginyeria Marítima, Universitat Politècnica de Catalunya, Barcelona, Spain

Abstract. This paper deals with the limits in hydrodynamic and morphodynamic predictions for semi-enclosed coastal domains subject to sharp gradients (in bathymetry, topography, sediment transport and coastal damages). It starts with an overview of wave prediction limits (based on satellite images and buoy records) in a restricted domain, namely the Mediterranean basin, followed by an in-depth analysis of the Catalan coast, one of its land boundaries. The morphodynamic modelling for such regions is next discussed, based on the impact of a characteristic storm. The driving wave and surge conditions produce a morphodynamic response that is validated against the pre- and post-storm emerged beach state, recovered from two lidar images. The quality of the fit is discussed in terms of the physical processes and the suitability of the employed modelling suite. From here an assessment of errors and uncertainties is presented, with the aim of establishing the prediction limits for flooding and erosion analyses, key elements for coastal engineering decisions.

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