Detection and description of sand dunes using a geomorphometric approach - ENSTA Bretagne - École nationale supérieure de techniques avancées Bretagne Accéder directement au contenu
Communication Dans Un Congrès Année :

Detection and description of sand dunes using a geomorphometric approach


In the last decades, sandbanks and sand dunes of various shapes and sizes have been found and described on continental shelves all over the world. These structures tend to migrate and our understanding of the mechanisms regulating their dynamics is limited. These sandbanks became a concern due to the fact that they interfere with the human activities at sea. Consequently, their presence has economical and environmental impacts. The purpose of this study is to automatically detect these dunes in DTMs (Digital Terrain Models) generated from MBES data. So far, automatic techniques aiming at describing marine dune fields have always brought information such as the height, dune spacing or the orientation at local scale but never went down to a dune scale. Currently, the dunes are still manually digitized and then form parameters are calculated. This task is tedious and time-consuming. In addition, the amount of data to process being always bigger, it gets difficult for operators to keep the pace. To address this issue, we propose a geomorphometric approach. Attributes such as the slope or curvatures are estimated from DTMs. A combined analysis of the metrics maps enables to extract dunes from their environment. The following step is the determination of parameters characterizing the shape and size for each dune. This work provides knowledge about dune fields at a detailed level. Thus, the composition, spatial distribution and other aspects of sand banks can be obtained. Further research can be conducted in order to learn more about the dynamics of dune fields at an individual level.
Fichier non déposé

Dates et versions

hal-01373425 , version 1 (28-09-2016)


  • HAL Id : hal-01373425 , version 1


Julien Ogor, Nathalie Debese, Benoit Zerr, Thierry Garlan. Detection and description of sand dunes using a geomorphometric approach. Seabed and Sediment Acoustics: Measurements and Modelling, University of Bath, Sep 2015, Bath, United Kingdom. ⟨hal-01373425⟩
348 Consultations
0 Téléchargements


Gmail Facebook Twitter LinkedIn More