The coastal zone is a high-stakes area for the coming years, particularly given the consequences of climate change (sea-level rise, more intense storms, even more frequent). In fact, coastal areas, particularly the coastline, are highly progressive areas with eroding areas sometimes several meters per year for soft shores. They are expected to suffer increased sea assaults during storms, increasing the intensity of erosion and causing submersions for low-lying areas that are damaging to local populations and the local economy.
The long-term observation of the evolution of this area is therefore a major challenge in which the Ocean Domains Laboratory in close collaboration with the Geomer laboratory is fully involved via the SOERE Observation and Experimentation Systems, in the long term. , for Environmental Research “Dimensioning” labeled since 2010 by Allenvi.
SOERE “Coastline” is an observation network, multi-site and integrated, on the three coastal facades metropolitan. It is managed by the universities of Brest, Caen and Montpellier, in collaboration with regional academic and public partners (General Councils, regional, Dreal, DDTM, …).
The objective is to perpetuate the long-term time series, to harmonize the observation strategies between the laboratories, to implement modern means of measurement for an observation integrated at the same time of the evolution of the object ” coastline “and basic dynamic forcing parameters. Coastal topography data, transformed into Digital Terrain Models (DTMs), provides basic information for the development of numerical or even physical modeling to initiate prospective research oriented towards the future of coastal systems.
The measurements made are mainly topographic, bathymetric and sea level measurements made with the laboratory’s means:
- Multi-beam sounders (SMF)
- Terrestrial Laser Scanner (TLS or Lidar)
- Surveying equipment (differential GPS)
- Onboard instruments and DRELIO imager drone
Observatory of Erosion in the West Indies (ObsErA)
The Oceanic Domains laboratory is also involved in the Observatory of Erosion in the West Indies (ObsErA) which is an observation service of the INSU-CNRS and the Institute of Physics of the Globe of Paris devoted to the study of alteration and erosion in the West Indies.
Member of the Research River Basin Network and the Critical Zone Observatory Network, it involves teams from the Institute of Physics of the Globe of Paris, the Volcanological and Seismological Observatory of Guadeloupe, the University Antilles-Guiana, the laboratory Oceanic domains (UBO) and the Earth Sciences Laboratory of Claude Bernard University (Lyon I).
The objective of ObsErA is to allow the creation of a database of water flows (precipitation and river flow), sediment flows and organic matter (in particular carbon) in rivers and on rivers. and the chemical composition of rivers and soils in the particular context of the island of Basse-Terre in Guadeloupe, marked by a tropical climate and active volcanism. This database will enable the scientific community to study and quantify modes of chemical and physical erosion, as well as their impact on the environment (soil composition, river chemistry, carbon flux, etc.). To date, ObsErA follows the evolution of 3 watersheds located within the Guadeloupe National Park: Capesterre, Bras-David and Vieux-Habitants.
Link to the ObsErA website