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La géomatique au service de l'observation du trait de côte - Contribution à l'étude des aléas côtiers sur les littoraux dunaires de la région Pays de la Loire (France)

Abstract : Following last decade series of morphogenic storms, an acute awareness emerged on the role of coastal dunes against physical hazards. Some dune ridges may act as natural defense systems, and therefore must be monitored closely. Along the coastal zone, where strong human and non-human stakes coexist, the evaluation of the dune protection capability is crucial. This PhD proposes an answer to the lack of operational tool to propose fine diagnoses. Spatial analysis methods, which are commonly used in coastal studies, have constraints; the objective here is thus to develop and to apply a reproducible geomatic process to assess (i) the susceptibility of coastal dunes and (ii) the exposure of non-human stakes regarding coastal erosion and marine flooding. The integration and aggregation of synthetic indicators within observation units (or boxes) along the coast enables realizing multiscalar diagnoses of coastal dunes. To better characterize the at-risk territories, the urban sections of the coast with historical shoreline recession are identified, as well as dune systems presenting a weak protection capability against flooding. Resolutely operational, this automated process is a strong contribution to the objectives of improving knowledge and making decision support of the regional coastline observatories.
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Contributor : Martin Juigner <>
Submitted on : Friday, February 9, 2018 - 1:59:02 PM
Last modification on : Wednesday, October 14, 2020 - 4:09:35 AM
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  • HAL Id : tel-01705398, version 1

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Martin Juigner. La géomatique au service de l'observation du trait de côte - Contribution à l'étude des aléas côtiers sur les littoraux dunaires de la région Pays de la Loire (France). Géographie. Université de Nantes, 2017. Français. ⟨tel-01705398⟩

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