A5014802011- Geological and Geophysical Studies
- Geological and Geophysical Studies Worldwide
- Geological formations and processes
- Geophysical and Geoelectrical Methods
- Island Studies and Pacific Affairs
- Seismic Waves and Analysis
- Geophysical Methods and Applications
- Groundwater and Watershed Analysis
- Landslides and related hazards
- Groundwater and Isotope Geochemistry
- Flood Risk Assessment and Management
- Geochemistry and Geologic Mapping
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Groundwater flow and contamination studies
- Coral and Marine Ecosystems Studies
- Geological Modeling and Analysis
- Geological and Geochemical Analysis
- Tropical and Extratropical Cyclones Research
- Coastal and Marine Management
- Karst Systems and Hydrogeology
- Cryospheric studies and observations
- Geotourism and Geoheritage Conservation
- Maritime and Coastal Archaeology
- Tree Root and Stability Studies
Institut de physique du globe de Paris
2013-2024
Université Paris Cité
2013-2024
Centre National de la Recherche Scientifique
2013-2024
Observatoire des Sciences de l'Univers de la Réunion
1997-2024
Écologie Marine Tropicale des Océans Pacifique et Indien
2012-2023
Sorbonne Paris Cité
2013-2018
Institut de Recherche pour le Développement
2009-2014
University of Reunion Island
2001-2012
Centre de Recherche et d’Enseignement de Géosciences de l’Environnement
2007
Core Ideas OZCAR is a network of sites studying the critical zone. covers various disciplines. will help disciplines to work together for better representation and modeling The French zone initiative, called (Observatoires de la Zone Critique–Application et Recherche or Critical Observatories–Application Research) National Research Infrastructure (RI). OZCAR‐RI instrumented sites, bringing 21 pre‐existing research observatories monitoring different compartments situated between “the rock...
Abstract Electrical and electromagnetic methods are well suited for coastal aquifer studies because of the large contrast in resistivity between fresh water‐bearing salt formations. Interpretation models these aquifers typically contain four layers: a highly resistive unsaturated zone; surficial water intermediate resistivity; an underlying conductive, saturated aquifer; substratum. Additional layers may be added to allow variations lithology within layers. Two evaluated: direct current time...
Abstract Dolines are closed geomorphological depressions which surface manifestations of karstic systems. Usually developed on limestones, they also typify the morphology New Caledonian landscape, particularly southern massif main island (known as Massif du Sud). The specificity dolines here lies in their development ultramafic rocks. They evidences subsidence, suffosion and collapse phenomena resulting from dissolution weathering peridotites. However, extensive underground drainage systems...
Abstract In volcanic islands, a crucial step in managing watershed water resources is the characterization of groundwater aquifers from local to regional scales. Airborne geophysical data provide high‐resolution images down hundreds meters below surface, over large areas. Yet, production an accurate interpretation imagery may be time consuming or limited by low density geological and hydrological field observations. Here, we propose approach combining airborne electromagnetic magnetic order...
In small islands, a freshwater lens can develop due to the recharge induced by rain. Magnitude and spatial distribution of this control elevation depth its interface with salt water. Therefore, study morphology gives useful information on both water uptake evapotranspiration vegetation. Electrical resistivity tomography was applied coral reef island, giving relevant structure. Variable density groundwater flow models were then simulate behavior. Cross validation geoelectrical model showed...
Abstract A thick regolith with supergene nickel ore deposits, developed from ultramafic rocks in New Caledonia (southwest Pacific), was investigated using electrical resistivity tomography (ERT). This paper presents the results of an survey and monitoring lateritic weathering mantle Tiebaghi plateau. Resistivity pseudosections, validated by many borehole logs, contributed to defining a four-layer geoelectric model corresponding four main horizons: (i) ferricrete soft nodular horizon; (ii)...
Among the processes controlling landslide dynamics, piezometry plays a major role. The characterization of landslide’s aquifer recharge (=inflows) is thus indispensable for predicting displacements. In this research, large Grand Ilet in humid tropical, Reunion Island was characterized through multi-disciplinary and robust hydrological approach, notably comprising precise water budget (outflows = inflows). Surface play role regime. Runoff less than 1% rainfall (2400 mm/year) due to soil’s...
Abstract. Volcanic eruptions through crater lakes often generate lahars, causing loss of life and property. On Ambae volcano, recent eruptive activities have rather tended to reduce the water volume in lake (Lake Voui), turn, reducing chances for outburst floods. Lake Voui occupies a central position summit caldera is well enclosed by relief. Eruptions with significantly higher magnitude than that 1995 2005 are required an outburst. A more probable scenario lahar events overflow from Manaro...
Abstract Today, resilience in the face of cyclone risks has become a crucial issue for our societies. With climate change, risk strong cyclones occurring is expected to intensify significantly and impact way life many countries. To meet some associated challenges, interdisciplinary ReNovRisk programme aims study tropical their impacts on South-West Indian Ocean basin. This article presentation programme, which divided into four areas: cyclonic hazards, erosion solid transport processes,...