Monitoring the Topography of a Dynamic Tidal Inlet Using UAV Imagery - HAL-SHS - Sciences de l'Homme et de la Société Accéder directement au contenu
Article Dans Une Revue Remote Sensing Année : 2016

Monitoring the Topography of a Dynamic Tidal Inlet Using UAV Imagery

Nathalie Long
Bastien Millescamps
  • Fonction : Auteur
  • PersonId : 984332
Frédéric Pouget
  • Fonction : Auteur
  • PersonId : 945611
Xavier Bertin
  • Fonction : Auteur
  • PersonId : 984334

Résumé

Unmanned Aerial Vehicles (UAVs) are being increasingly used to monitor topographic changes in coastal areas. Compared to Light Detection And Ranging (LiDAR) data or Terrestrial Laser Scanning data, this solution is low-cost and easy to use, while allowing the production of a Digital Surface Model (DSM) with a similar accuracy. Three campaigns were carried out within a three-month period at a lagoon-inlet system (Bonne-Anse Bay, La Palmyre, France), with a flying wing (eBee) combined with a digital camera. Ground Control Points (GCPs), surveyed by the Global Navigation Satellite System (GNSS) and post-processed by differential correction, allowed georeferencing DSMs. Using a photogrammetry process (Structure From Motion algorithm), DSMs and orthomosaics were produced. The DSM accuracy was assessed against the ellipsoidal height of a GNSS profile and Independent Control Points (ICPs) and the root mean square discrepancies were about 10 and 17 cm, respectively. Compared to traditional topographic surveys, this solution allows the accurate representation of bedforms with a wavelength of the order of 1 m and a height of 0.1 m. Finally, changes identified between both main campaigns revealed erosion/accretion areas and the progradation of a sandspit. These results open new perspectives to validate detailed morphological predictions or to parameterize bottom friction in coastal numerical models.
Fichier principal
Vignette du fichier
remotesensing-08-00387-publie.pdf (12.09 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

halshs-01340509 , version 1 (01-07-2016)

Identifiants

Citer

Nathalie Long, Bastien Millescamps, Benoît Guillot, Frédéric Pouget, Xavier Bertin. Monitoring the Topography of a Dynamic Tidal Inlet Using UAV Imagery. Remote Sensing, 2016, Special Issue Remote Sensing in Coastal Environments, 8 (387), ⟨10.3390/rs8050387⟩. ⟨halshs-01340509⟩
211 Consultations
538 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More