A5010464578- Coastal and Marine Dynamics
- Aeolian processes and effects
- Coastal wetland ecosystem dynamics
- Soil erosion and sediment transport
- Remote Sensing and LiDAR Applications
- Geological formations and processes
- Maritime and Coastal Archaeology
- Geophysics and Gravity Measurements
- Geology and Paleoclimatology Research
- 3D Surveying and Cultural Heritage
- French Urban and Social Studies
- Geological and Geophysical Studies Worldwide
- earthquake and tectonic studies
- Coral and Marine Ecosystems Studies
- Inertial Sensor and Navigation
- Coastal and Marine Management
- GNSS positioning and interference
- Tropical and Extratropical Cyclones Research
- Landslides and related hazards
- Hydrology and Sediment Transport Processes
- Geomagnetism and Paleomagnetism Studies
- Flood Risk Assessment and Management
- Underwater Acoustics Research
- Satellite Image Processing and Photogrammetry
- African Botany and Ecology Studies
Institut Universitaire Européen de la Mer
2013-2024
Centre National de la Recherche Scientifique
2009-2024
Université de Bretagne Occidentale
2009-2024
Ifremer
2022-2024
Geo-Ocean
2018-2021
Laboratoire d’Océanologie et de Géosciences
2018
Océanopolis
2009-2017
Institut de physique du globe de Paris
2002-2009
Intertidal mudflats play a critical role in estuarine exchange, connecting marine and continental supplies of nutrients sediments. However, their complex morphodynamics, associated with wide range physical biological processes, are still poorly understood require further field investigation. In addition, challenging areas for Structure-from-Motion (SfM) photogrammetric surveys. Indeed, the generally hold back residual tidal water, which can make stereo restitution particularly difficult...
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...
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...
Advances in image-based remote sensing using unmanned aerial vehicles (UAV) and structure-from-motion (SfM) photogrammetry continue to improve our ability monitor complex landforms over representative spatial temporal scales. As with other water-worked environments, coastal sediments respond shaping processes through the formation of multi-scale topographic roughness. Although this complexity can be an important marker hydrodynamic forces sediment transport, it is seldom characterized...
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)...
A field experiment was conducted at a tropical microtidal intermediate sandy beach with low tide terrace (Nha Trang, Vietnam) to investigate the short-term swash-zone hydrodynamics and morphodynamics under variable wave conditions. Continuous 2D Lidar scanner observations of height lower foreshore, subsequent run-up swash-induced topographic changes were obtained. These data complemented by detailed real-time kinematic GPS surveys. Variable conditions experienced during relatively large...
Gravity on Earth is of great interest in geodesy, geophysics, and natural resource exploration. Ship-based gravimeters are a widely used instrument for the collection surface gravity field data marine regions. However, due to considerable distance from sea seafloor, spatial resolution collected ships often insufficient image detail seafloor geological structures explore offshore minerals. Therefore, development mobile underwater gravimetry system necessary. The GraviMob gravimeter, developed...
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,...
Abstract The morphodynamic functioning of the Sillon de Talbert gravel barrier spit is analysed using a high‐frequency survey carried out between September 2012 and December 2019. It based on beach profile measurements along two transects, modelling offshore wave data (WW3), tide gauge records, shallow waves water levels recorded in intertidal zone. A retreat −23 to −30 m over 7‐year (i.e. −3.3 −4.3 yr −1 ) measured. This not related long‐term sea level rise (macroscale 10 2 –10 3 yr), but...
In this study, we used orthomosaics and a digital surface model (DSM) generated from drone surveys to (1) characterize the distribution of mussel (Mytilus galloprovincialis) aggregations at high resolution (centimeters), (2) evaluate role topographic features, intertidal height, slope, orientation angle in determining on two rocky shores oriented differently both sides beach French Brittany coast. We first developed tested visualization index (MVI) for mapping images. Then, analyzed shores....
The Sillon de Talbert is situated on the Northern coast of Brittany; it a large 3.5 km-long swash-aligned gravel spit barrier comprising volume sediment 1.23x106 m³. Since 2002 morphodynamic survey was carried out. It based annual DEMs and monthly beach profile measurements. Waves water levels are also surveyed using modelling data field 15-years (2002-2017) budget calculation shows that cross-shore transfers dominant represent total 370,000 m³, while longshore transfer estimated at about...
The purpose of this paper is to present the design, development and testing an innovative instrument called GraviMob, which allows performing dynamic measurements underwater gravity anomalies. After recalling interest in gravimetry, we describe system, core consists triads accelerometers rigidly attached Autonomous Underwater Vehicle (AUV). article also presents mathematical methods for estimating east, north vertical components local vector. An unscented Kalman filter, integrating AUV...
Intertidal DEM have a growing interest for ecological, geological and land development purposes. However, due to the characteristics of this environment, are not easy obtain frequently good enough in resolution be interpreted. In study, waterline method has been used build high-resolution DEM. This technique is basically based on accurate localization boundary between water sand. limit being an iso-height line, multitemporal detection can derive Because distinct physical both sand water,...
The current tectonics of north Iceland are characterised by max M 6–7 earthquakes in the transform zone between northern rift and Kobleinsey Ridge. last rifting period (1975–1984) was associated with an opening up to 9 m along Krafla fissure swarm. This followed disappearance microseismicity eastern part Husavik‐Flatey Fault, main structure zone. A GPS network occupied 1995 again 1997 study present‐day deformation on both sides on‐land HFF around its junction deformational features observed...