Exploiting remote imagery in an embayed sandy beach for the validation of a runup model framework - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Estuarine, Coastal and Shelf Science Année : 2019

Exploiting remote imagery in an embayed sandy beach for the validation of a runup model framework

(1) , (2) , (2) , (2) , (2)
1
2

Résumé

Storm surge and wave runup are key determinants of the potential for beach overwashing during storm events. However, the prediction and quantification of wave runup on embayed beaches is strongly influenced by particular characteristics (e.g., irregular morphology, low tides, absence of swell, etc.) which differ from those on open beaches, and have rarely been investigated in literature. In the present paper, a model framework aimed at predicting wave-induced runup on an embayed sandy beach is validated by means of measurements derived from a video-monitoring station, recently installed in South Italy, during two storm events in 2016. The numerical approach employs MeteOcean forecasted waves within SWAN and SWASH models (in both 2-d and 1-d mode). The combination of multibeam and d-RTK surveys with Unmanned Aerial Vehicle (UAV) imagery provides high resolution depth grid (m 0.015), particularly required in shallow waters, where wave hydrodynamics is highly influenced by the bottom. The results show and discuss the agreement between video measurements and 2-d predictions of runup. A sensitivity analysis of the Manningfls roughness factor is needed in 1-d simulations. The accuracy of the empirical formulas in predicting wave runup in an embayed beach is also investigated , showing mainly an overestimation of the observations.
Fichier principal
Vignette du fichier
EstCoasShelfScience_manuscript.pdf (24.51 Mo) Télécharger le fichier
Loading...

Dates et versions

hal-02170546 , version 1 (02-07-2019)

Identifiants

Citer

Nico Valentini, Alessandra Saponieri, Alessandro Danisi, Luigi Pratola, Leonardo Damiani. Exploiting remote imagery in an embayed sandy beach for the validation of a runup model framework. Estuarine, Coastal and Shelf Science, 2019, 225, pp.106244. ⟨10.1016/j.ecss.2019.106244⟩. ⟨hal-02170546⟩

Collections

BRGM
134 Consultations
150 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More