ORCID Profile
0000-0002-5457-4187
Current Organisation
Environnements et Paléoenvironnements Océaniques
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Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 08-2023
Publisher: Elsevier BV
Date: 09-2022
Publisher: American Geophysical Union (AGU)
Date: 20-01-2023
DOI: 10.1029/2022GL100498
Abstract: Accurately mapping the evolving bathymetry under energetic wave breaking is challenging, yet critical for improving our understanding of sandy beach morphodynamics. Though remote sensing is one of the most promising opportunities for reaching this goal, existing depth‐inversion algorithms using linear approaches face major theoretical and/or technical issues in the surf zone, limiting their accuracy over this region. Here, we present a new depth‐inversion approach relying on Boussinesq theory for quantifying nonlinear dispersion effects in nearshore waves. Using high‐resolution datasets collected in the laboratory under erse wave conditions and beach morphologies, we demonstrate that this approach results in enhanced levels of accuracy in the surf zone (errors typically within 10%) and presents a major improvement over linear methods. The new nonlinear depth‐inversion approach provides significant prospects for future practical applications in the field using existing remote sensing technologies, including continuous lidar scanners and stereo‐imaging systems.
Publisher: Elsevier BV
Date: 04-2017
Publisher: American Geophysical Union (AGU)
Date: 05-2018
DOI: 10.1029/2017JC013369
Publisher: Hindawi Limited
Date: 2016
DOI: 10.1155/2016/7965431
Abstract: This paper presents an investigation into the use of a 2-dimensional laser scanner (LiDAR) to obtain measurements of wave processes in the inner surf and swash zones of a microtidal beach (Rousty, Camargue, France). The bed is extracted at the wave-by-wave timescale using a variance threshold method on the time series. In idual wave properties were then retrieved from a local extrema analysis. Finally, in idual and averaged wave celerities are obtained using a crest-tracking method and cross-correlation technique, respectively, and compared with common wave celerity predictors. Very good agreement was found between the in idual wave properties and the wave spectrum analysis, showing the great potential of the scanner to be used in the surf and swash zone for studies of nearshore waves at the wave-by-wave timescale.
Publisher: Coastal Education and Research Foundation
Date: 26-05-2020
DOI: 10.2112/SI95-231.1
Publisher: Elsevier BV
Date: 02-2019
Publisher: MDPI AG
Date: 10-05-2017
DOI: 10.3390/RS9050462
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Kévin Martins.