A5003646404- Coastal and Marine Dynamics
- Geological formations and processes
- Aeolian processes and effects
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Remote Sensing and LiDAR Applications
- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
- 3D Surveying and Cultural Heritage
- Underwater Acoustics Research
- Coastal wetland ecosystem dynamics
- Maritime and Coastal Archaeology
- Coastal and Marine Management
- Flood Risk Assessment and Management
- Coral and Marine Ecosystems Studies
- Geological Modeling and Analysis
- Remote-Sensing Image Classification
- Ocean Waves and Remote Sensing
- Robotics and Sensor-Based Localization
- Cryospheric studies and observations
- Geotechnical Engineering and Analysis
- Tropical and Extratropical Cyclones Research
- Geotechnical Engineering and Soil Stabilization
- Disaster Management and Resilience
- Satellite Image Processing and Photogrammetry
Institut Universitaire Européen de la Mer
2015-2023
Université de Bretagne Occidentale
2015-2023
Centre National de la Recherche Scientifique
2015-2023
Laboratoire des Sciences de l'Environnement Marin
2023
AMURE - Centre de droit et d'économie de la mer
2023
Institut de Recherche pour le Développement
2021-2023
Ifremer
2021-2023
Centre d'Études et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement
2015-2022
Geo-Ocean
2017-2021
University of Modena and Reggio Emilia
2020
For monitoring purposes and in the context of geomorphological research, Unmanned Aerial Vehicles (UAV) appear to be a promising solution provide multi-temporal Digital Surface Models (DSMs) orthophotographs. There are variety photogrammetric software tools available for UAV-based data. The objective this study is investigate level accuracy that can achieved using two these tools: Agisoft PhotoScan® Pro an open-source alternative, IGN© MicMac®, sub-optimal survey conditions (rugged terrain,...
Long-term datasets documenting the evolution of coastal forms and processes, through provision recurring beach as well shoreface morphological observations accompanying time-series environmental controls, remain difficult to collect are rarely made available. However, they increasingly needed further our understanding change improve models that will help planning what future coast be. This data descriptor presents results topographic bathymetric surveys at Porsmilin, a macrotidal embayed...
Owing to the combination of technological progress in Unmanned Aerial Vehicles (UAVs) and recent advances photogrammetry processing with development Structure-from-Motion (SfM) approach, UAV enables rapid acquisition high resolution topographic data at low cost. This method is particularly widely used for geomorphological surveys linear coastal landforms. However, are generally pointed out as problematic cases because geometric distortions creating a “bowl effect” computed Digital Elevation...
Impacts from natural and anthropogenic coastal hazards are substantial increasing significantly with climate change. Coasts communities increasingly at risk. In addition to short-term events, long-term changes, including rising sea levels, storm intensity consequent severe compound flooding events degrading ecosystems threatening dwellers. Human impacts exacerbate degradation. Consequently, people living near the coast require environmental intelligence reliable predictions in order...
This paper aims to compare models from terrestrial laser scanning (TLS), photogrammetry (TP), and unmanned aerial vehicle (UAVP) surveys evaluate their potential in cliff erosion monitoring. TLS has commonly been used monitor cliff-face (monitoring since 2010 Normandy) because it guarantees results of high precision. Due some uncertainties limitations TLS, TP UAVP can be seen as alternative methods. First, the texture quality is better than that which could useful for analysis...
Hyperspectral imagery has proven its potential in many research applications, especially the field of environmental sciences. Currently, hyperspectral imaging is generally performed by satellite or aircraft platforms, but mini-UAV (Unmanned Aerial Vehicle) platforms (<20 kg) are now emerging. On such payload restrictions critical, so sensors must be selected according to stringent specifications. This article presents integration a light pushbroom sensor onboard multirotor UAV, which we...
This paper presents results from an experiment designed to improve the understanding of relationship between extreme breaking waves and their mechanical loading on heritage offshore lighthouses. The experiment, conducted at La Jument, iconic French lighthouse, featured several records wave, current structure accelerations acquired during severe storm conditions, with individual as high 24 m. Data analysis focuses a event marked by strong peak in horizontal measured inside Jument. Thanks...
Research Article| March 01, 2007 Long-term tectonic control on Holocene shelf sedimentation offshore La Jolla, California Leah J. Hogarth; Hogarth 1Scripps Institution of Oceanography, University California-San Diego, 92093, USA Search for other works by this author on: GSW Google Scholar Jeffrey Babcock; Babcock Neal W. Driscoll; Driscoll Nicolas Le Dantec; Dantec Jennifer K. Haas; Haas Douglas L. Inman; Inman Patricia M. Masters Author and Article Information Publisher: Geological Society...
In the dual context of coastal hazard intensification and growing number stakes exposed to these hazards, observatories are in demand provide a structured framework dedicated long-term monitoring. This article describes drone-based photogrammetry monitoring performed since 2006 on Porsmilin Beach (Brittany, France) DYNALIT (Littoral Coastline Dynamics) observatory, focusing data quality consistency time series under influence multiple technological evolutions: Unmanned Aerial Vehicles (UAV)...
Abstract Understanding the interactions between dune systems and beaches is critical to determining short‐term shoreline response long‐term resilience. In this study, almost 15 years of monthly beach/dune measurements were analyzed for three different profiles at Vougot Beach, France understand predict changes from intra‐annual multi‐annual time‐scales. Four migration modes: advance/retreat (translation modes) steepening/flattening (rotation identified through a centroid analysis. The analysis...
Stéphan, P.; Blaise, E.; Suanez, S.; Fichaut, B.; Autret, R.; Floc'h, F.; Cuq, V.; Le Dantec, N.; Ammann, J.; David, L.; Jaud, M., and Delacourt, C., 2019. Long, medium, short-term shoreline dynamics of the Brittany Coast (western France). In: Castelle, B. Chaumillon, E. (eds.), Coastal Evolution under Climate Change along Tropical Overseas Temperate Metropolitan France. Journal Research, Special Issue No. 88, pp. 89–109. Coconut Creek (Florida), ISSN 0749-0208.This paper aims to analyze...
Hyper-DRELIO (Hyperspectral DRone for Environmental and LIttoral Observations) is a custom, mini-UAV (unmanned aerial vehicle) platform (<20 kg), equipped with light push broom hyperspectral sensor combined navigation module measuring position orientation. Because of the particularities UAV surveys (low flight altitude, small spatial scale, high resolution), dedicated pre-processing methods have to be developed when reconstructing imagery. This article presents light, easy-implementation,...
The georeferencing process is crucial to the accuracy of terrestrial laser scanner (TLS) data, in particular context diachronic studies relying on multi-temporal surveys. use Ground Control Points can however be complex when confronted with practical constraints coastal surveying. A simple and quick alternative method called "pseudo-direct georeferencing" proposed present paper. This involves internal inclinometers measure roll pitch angles a centimetric GPS position TLS center one backsight...
Monitoring coastal seabed in very shallow waters (0–5 m) is a challenging methodological issue, even though such data of major importance to many scientific and technical communities. Over the years, Structure-from-Motion (SfM) photogrammetry has emerged as flexible inexpensive method able provide both 3D model high-resolution imagery (~cm level). In this study, we propose low-cost (about USD 1500), adaptable, lightweight easily dismantled system called POSEIDON (for Platform Operating...
Under natural and anthropogenic pressure, the coastal regions are evolving rapidly (population growth, erosion, modification of services, etc.), some these changes increase their vulnerability. Monitoring evolution has thus become essential to understand how they respond various pressures define resilience could be increased. Among other outcomes, such monitoring should provide continuous, high-resolution data on spatial temporal areas, especially shoreline zone. One appropriate way acquire...
Floc'h, F.; Le Dantec, N.; Lemos, C.; Concouët, R.; Sous, D.; Petitjean, L.; Bouchette, Ardhuin, F; Suanez, S., and Delacourt, C., 2016. Morphological Response of a Macrotidal Embayed Beach, Porsmilin, France. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., McCarroll, R.J. (eds.), Proceedings the 14th International Coastal Symposium (Sydney, Australia). Journal Research, Special Issue, No. 75, pp. 373–377. Coconut Creek (Florida), ISSN 0749-0208.Morphodynamics sandy, macrotidal, embayed...
Acoustic scattering can be used to estimate Suspended Sediment Concentration (SSC) through acoustic inversion methods. Current SSC quantification methods are mostly unable observe both spatial and temporal variations. Here, we assess the possibility measure using a Multibeam Echosounder (MBES). MBES combine large covering in water column capability 'on route', allowing better representativity of measurements. Time-series raw EM3002-MBES data at 300 kHz were acquired during 5-hours field...
Abstract The study of the suspended particulate matter (SPM) transport is essential to understanding oceans and rivers, for their presence can impact environment, from marine habitats or water quality degradations important changes seabed morphology. Among a large number surrogate techniques in traditional sampling, acoustical methods have advantage providing nonintrusive measurements, with high spatial temporal resolutions. However, ability fine-grained sediments aggregate under process...