A5052055718- Hydrology and Watershed Management Studies
- Geology and Paleoclimatology Research
- Geochemistry and Elemental Analysis
- Heavy metals in environment
- Geochemistry and Geologic Mapping
- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
- Soil and Water Nutrient Dynamics
- Groundwater flow and contamination studies
- Plant Water Relations and Carbon Dynamics
- Water Quality and Pollution Assessment
- Soil Geostatistics and Mapping
- Soil Carbon and Nitrogen Dynamics
- Hydrological Forecasting Using AI
- Mercury impact and mitigation studies
- Tree-ring climate responses
- Radioactive element chemistry and processing
- Cryospheric studies and observations
- Water Quality Monitoring Technologies
- Groundwater and Isotope Geochemistry
- Soil and Unsaturated Flow
- Geophysical and Geoelectrical Methods
- Geological and Geochemical Analysis
- Fish Ecology and Management Studies
- Invertebrate Taxonomy and Ecology
Luxembourg Institute of Science and Technology
2015-2024
Consumers, Health, Agriculture and Food Executive Agency
2008-2013
Universidade de São Paulo
2010
Laboratoire Écologie Fonctionnelle et Environnement
2006-2007
Institut National Polytechnique de Toulouse
2005-2006
École Nationale Supérieure Agronomique de Toulouse
2005-2006
Centre National de la Recherche Scientifique
2003-2005
Université Toulouse III - Paul Sabatier
2005
Institut de Recherche pour le Développement
2005
Abstract The bedrock controls on catchment mixing, storage, and release have been actively studied in recent years. However, it has difficult to find neighbouring catchments with sufficiently different clean expressions of geology do comparative analysis. Here, we present new data for 16 nested (0.45 410 km 2 ) the Alzette River basin (Luxembourg) that span a range mixed schists, phyllites, sandstones, quartzites quantify relationships between permeability metrics water storage release. We...
Abstract. For more than two decades, research groups in hydrology, ecology, soil science, and biogeochemistry have performed cryogenic water extractions (CWEs) for the analysis of δ2H δ18O water. Recent studies shown that extraction conditions (time, temperature, vacuum) along with physicochemical properties may affect extracted isotope composition. Here we present results from first worldwide round robin laboratory intercomparison. We test null hypothesis that, identical soils, standards,...
Abstract The synthesis of experimental understanding catchment behaviour and its translation into qualitative perceptual models is an important objective hydrological sciences. We explore this challenge by examining the cumulative hydrology three catchments how it evolves through application different investigation techniques. case study considers Huewelerbach, Weierbach Wollefsbach headwater Attert basin in Luxembourg. Subsurface investigations including bore holes pits, analysis soil...
Abstract The hillslope‐riparian‐stream system is a key functional unit of catchments, yet very difficult to measure and monitor due its tremendous complexity high spatio‐temporal variability. Here, we present simple practical tool for imaging directly these hillslope‐riparian‐area connections. We used FLIR b50 infrared camera produce thermal images at the scale 140 × pixels over spectral range 7·5–13 µm. Our IR technique sensitive upper 0·1 mm water column. Images were obtained from constant...
The relationship between tracer velocities and wave or wetting front celerities is essential to understand water flowing from hillslopes the stream. connection maximum velocity estimated by means of experimental techniques has not been explored. To assess pattern infiltrating dominant flow direction, we performed sprinkling experiments at a trenched plot in Weierbach catchment Luxembourg. Maximum were inferred different depths using artificial tracers, soil moisture measurements (TDR),...
Abstract The Weierbach experimental catchment (0.45 km 2 ) is the most instrumented and studied sub‐catchment in Alzette River basin Luxembourg. Within last decade, it has matured towards an interdisciplinary critical zone observatory focusing on a better understanding of hydrological hydro‐geochemical processes. embedded elevated sub‐horizontal plateau, characterized by slate bedrock representative Ardennes Massif. Its climate semi‐marine, with precipitation being rather evenly distributed...
Abstract In situ soil moisture data from the Bibeschbach experimental catchment in Luxembourg are used to evaluate relative surface observed with MetOp‐A Advanced Scatterometer (ASCAT). Filtered and bias‐corrected wetness indices (SWIs) derived coarse‐resolution (25 km) C‐band scatterometer observations shown be highly correlated ( r = 0.86) catchment‐averaged measured field. The combination of ASCAT ENVISAT Synthetic Aperture Radar (ASAR) sets yields high‐resolution (1 that is equally well...
In order to precisely quantify the contribution of anthropogenic activities and geogenic sources dissolved suspended loads rivers we have combined for first time Rare Earth Element (REE) concentrations with Sr–Nd–Pb isotope ratios. We observed enrichments in Anthropogenic Elements (AREE) (Gd) (Ce Nd) river water. During flood events, AREE anomalies progressively disappeared gave way chemical signature basin both loads. The isotopic data confirm these observations shed new light on trace...
Abstract. Hydromorphodynamic models are powerful tools for predicting the potential mobilization and transport of sediment in river ecosystems. Recent studies have shown that they able to predict suspended matter concentration small systems satisfactorily. However, hydro-sedimentary modelling exercises often neglect properties (e.g. densities grain-size distribution), which known directly control dynamics water column during flood events. The main objective this study is assess whether a...
Enrichments in Gd and LREE/HREE fractionation have been observed for the dissolved colloidal fractions waters of Alzette River during low flow conditions. They can be related to effluents waste water treatment plants (Gd/Gd*: 8-380 LaN/YbN: 0.02-0.07). Mean daily flux balance calculations at basin scale show that conditions only comes from anthropogenic effluents. When flood events occur, anomaly progressively disappears gives way a chemical signature, which is closer natural REE sources...
Subsurface flow is often recognized as a dominant runoff generation process. However, observing subsurface properties, and understanding how they control pathways, remains challenging. This paper investigates surface slope bedrock cleavage pathways in slate headwater catchment Luxembourg, characterised by double-peak streamflow response. We use range of experimental techniques, including field observations soil characteristics, sprinkling experiment at site located 40 m upslope from the...
Abstract. Within the critical zone, regolith plays a key role in fundamental hydrological functions of water collection, storage, mixing and release. Electrical resistivity tomography (ERT) is recognized as remarkable tool for characterizing geometry properties regolith, overcoming limitations inherent to conventional borehole-based investigations. For exploring shallow layers, small electrode spacing (ES) will provide denser set apparent measurements subsurface. As this option cumbersome...
Abstract Optical turbidity sensors have become standard instrumentation to estimate suspended particulate matter concentration (SPMC). However, readings respond factors other than SPMC, such as particle size and shape, organic fraction, sediment density color. Therefore, local site dependent calibrations are needed transfer SPMC. In this study, we propose a new relation between turbidity, (SPM) carbon content size, which helps move from SPMC toward generic relations based on inherent SPM...
Abstract. Fine sediments represent an important vector of pollutant diffusion in rivers. When deposited floodplains and riverbeds, they can be responsible for soil pollution. In this context, paper proposes a modelling exercise aimed at predicting transport fine dissolved pollutants. The model is based upon the Telemac hydro-informatic system (dynamical coupling Telemac-2D-Sysiphe). As empirical semiempirical parameters need to calibrated such exercise, sensitivity analysis proposed. An...