Accéder directement au contenu Accéder directement à la navigation
Communication dans un congrès

Studying and modeling of submerged aquatic vegetation environments seen by a single beam echosounder

Coralie Monpert 1 Michel Legris 1 Claire Noel 2 Benoit Zerr 1 Jean-Marc Le Caillec 3
1 Lab-STICC_ENSTAB_CID_SFIIS ; OSM
STIC - Pôle STIC [Brest], Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
2 semantic ts
Chercheur indépendant
Abstract : For environmental and economical issues, it is relevant to map the underwater vegetation distribution. Acoustic techniques seem to be the more efficient and cost effective method for that. Many observations were performed on submerged aquatic vegetation detection by acoustic echosounder. However few general studies were performed to quantitatively understand the acoustic process of scattering from underwater vegetation. In the first place, the effect of vegetation meadows on the temporal signal of the echo sounder is studied. Real data are used. They come from different sites and types of submerged aquatic vegetation. In most cases, the vegetation signal has a relatively strong backscatter signal before the bottom detection time and a less abrupt leading edge. However different species dependant behaviors are found. To explain this phenomenon, it is necessary to know more accurately the interaction between the acoustic wave and the environment made up of underwater vegetation and sea water. Therefore a model is developed. It recreates the temporal backscatter signal from an echosounder. The seabed is composed of two layers, the vegetation and the sediment layer. For sediments, existing statistical and physical models are used. For the vegetation, the model takes inspiration from the previous approaches and the geoacoustic parameters of this environment are fitted to the ground truth data.
Liste complète des métadonnées

https://hal-ensta-bretagne.archives-ouvertes.fr/hal-00729026
Contributeur : Annick Billon-Coat <>
Soumis le : vendredi 7 septembre 2012 - 11:53:00
Dernière modification le : mercredi 24 juin 2020 - 16:19:23
Archivage à long terme le : : vendredi 16 décembre 2016 - 10:47:15

Fichier

C.Monpert_ECUA12.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-00729026, version 1

Citation

Coralie Monpert, Michel Legris, Claire Noel, Benoit Zerr, Jean-Marc Le Caillec. Studying and modeling of submerged aquatic vegetation environments seen by a single beam echosounder. ECUA 2012, Jul 2012, Edinburgh, United Kingdom. ⟨hal-00729026⟩

Partager

Métriques

Consultations de la notice

830

Téléchargements de fichiers

816