A5051225326- Groundwater flow and contamination studies
- Groundwater and Isotope Geochemistry
- Groundwater and Watershed Analysis
- Soil and Unsaturated Flow
- Geophysical and Geoelectrical Methods
- Hydrology and Watershed Management Studies
- Geophysics and Gravity Measurements
- Hydraulic Fracturing and Reservoir Analysis
- Geological and Geophysical Studies Worldwide
- Hydrocarbon exploration and reservoir analysis
- Climate change and permafrost
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- GNSS positioning and interference
- Karst Systems and Hydrogeology
- Reservoir Engineering and Simulation Methods
- Solar and Space Plasma Dynamics
- Flood Risk Assessment and Management
- Geology and Paleoclimatology Research
- Water management and technologies
- Arctic and Antarctic ice dynamics
- Seismic Imaging and Inversion Techniques
- Radioactive element chemistry and processing
- Hydrology and Drought Analysis
Centre National de la Recherche Scientifique
2014-2024
Centre de Recherche et d’Enseignement de Géosciences de l’Environnement
2015-2024
Institut de Recherche pour le Développement
2013-2024
Sorbonne Université
2002-2023
Aix-Marseille Université
2012-2023
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2023
Flinders University
2023
Sustainable Europe Research Institute
2011-2019
Laboratoire Méditerranéen de Préhistoire Europe Afrique
2018
Collège de France
2018
The North‐Western Sahara Aquifer System (NWSAS), one of the world's largest groundwater systems, shows an overall piezometric decline associated with increasing withdrawals. Estimating recharge rate in such a semiarid system is challenging but crucial for sustainable water development. In this paper, NWSAS estimated using regional budget based on GRACE terrestrial storage monthly records, soil moisture from GLDAS (a land data that assimilates hydrological information), and pumping rates. A...
Abstract. In the Sahelian belt, Lake Chad is a key water body for 13 million people, who live on its resources. It experiences, however, substantial and frequent surface changes. Located at centre of one largest endorheic basins in world, waters remain surprisingly fresh. Its low salinity has been attributed to infiltration flow whose value remains poorly constrained. Understanding lake's hydrological behaviour response climate variability requires better constraint factors that control...
This study proposes a first conceptual model for the hydrogeological functioning of Tindouf Aquifer System (TAS) building upon geomorphological, geological and hydrological remotely sensed ground observations. Exploratory sketches piezometric contours main aquifers TAS identified (i) recharge areas on Anti-Atlas relief Hamada plateau, (ii) discharge mainly located in southeastern region where countless salt pans associated with groundwater evaporation were observed. The latter confirms...
Confined aquifers, distinguished by their large storage and long-term flow dynamics, are often overlooked in groundwater sustainability assessments rely on frameworks developed for unconfined systems. Unlike confined systems release water through the compressibility of porous medium, without pore drainage. These properties lead to lower storativity higher hydraulic diffusivity, resulting different responses perturbations, such as pumping or recharge temporal variations. Addressing these...
Electrostatic interactions, associated with negatively charged surfaces of clay minerals, produce a so‐called “disjoining pressure” when diffuse layers overlap, i.e., at low porosity. Disjoining pressure is the difference between water in pore space and that bulk solution same depth. Another widely used concept clay‐rocks “swelling pressure.” It corresponds fact to macroscopic average disjoining pressure. This study proposes determine value swelling natural material by simple...
The deep borehole (DB) experiment gave the opportunity to acquire hydraulic parameters in a hydraulically undisturbed zone of Opalinus Clay at Mont Terri rock laboratory (Switzerland). Three methods were used estimate conductivity and specific storage values formation its bounding formations through 248 m BDB-1: application Poiseuille-type law involving petrophysical measurements, spectral analysis pressure time series situ tests. range given by first method is 2 × 10−14–6 10−13 s−1 for...
Previous studies that made use of basin models have shown the normal geological evolution Paris does not generate observed, albeit weak, excess pressures in some shale layers basin. Other processes may created overpressures, currently neglected such models, are investigated here. Terms accounting for osmotic effects and tectonic stress changes successively added to diffusivity equation. The effect outcrop boundary conditions is also calculated with a pseudo‐two‐dimensional analytical...
Abstract. This study assesses the detailed water budget of Saq–Ram Aquifer System (520 000 km2) over 2002–2019 period using satellite gravity data from Gravity Recovery And Climate Experiment (GRACE). The three existing GRACE solutions were tested for their local compatibility to compute groundwater storage (GWS) variations in combination with soil moisture datasets available land surface models (LSMs) Global Land Data Assimilation (GLDAS). Accounting pumping, artificial recharge, and...
Abstract. In the Sahelian belt, Lake Chad is a key water body for 13 million people who live on its resources. It experiences, however, substantial and frequent surface changes. Located at center of one largest endorheic basins in world, waters remain surprisingly fresh. Its low salinity has been attributed to infiltration flow whose value remains poorly constrained. Understanding lake's hydrological behavior response climate variability requires better constraint factors that control...
Abstract The lack of data and suitable methods to quantify regional hydrological processes often hinders sustainable water management adaptation climate change in semiarid regions, particularly the Sahel, which is known for its climatic variability. Here we show that 36 Cl from nuclear tests a promising method estimate transit times groundwater recharge rates on catchment scale, distinguish chloride cycles. was measured 131 surface samples Chari-Logone sub-catchment emblematic Lake Chad...