Article
Engineering, Civil
Miao Jing, Estanislao Pujades, Chunhui Lu
Summary: This paper proposes a novel analytical model for groundwater transit time distributions in regional urban aquifers accounting for the impact of stormwater infiltration systems. The model provides decision-making support for urban water resources management and the design of stormwater infiltration systems.
JOURNAL OF HYDROLOGY
(2022)
Article
Geosciences, Multidisciplinary
Pierre Seraphin, Julio Goncalves, Bruno Hamelin, Thomas Stieglitz, Pierre Deschamps
Summary: This study assesses the water budget of the Saq-Ram Aquifer System using satellite gravity data and land surface model data. The results reveal spatial heterogeneity in groundwater recharge, with anthropogenic and natural factors playing major roles. The study highlights the importance of geological context in arid aquifer recharge, which has been previously overlooked.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2022)
Review
Environmental Sciences
Paolo Benettin, Nicolas B. Rodriguez, Matthias Sprenger, Minseok Kim, Julian Klaus, Ciaran J. Harman, Ype van der Velde, Markus Hrachowitz, Gianluca Botter, Kevin J. McGuire, James W. Kirchner, Andrea Rinaldo, Jeffrey J. McDonnell
Summary: This study reviews the recent developments in water transit time research, focusing on water-age-balance approaches and data-based approaches. Various methods, including StorAge-Selection functions, well/partially mixed compartments, and direct transit time estimates, are discussed and compared. The study aims to unify the heterogeneity in the literature and highlight the remaining open questions in transit time research.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Environmental
Attila Csaba Kondor, Eva Molnar, Anna Vancsik, Tibor Filep, Jozsef Szeberenyi, Lili Szabo, Gabor Maasz, Zsolt Pirger, Andras Weiperth, Arpad Ferincz, Adam Staszny, Peter Dobosy, Katalin Horvathne Kiss, Gergely Jakab, Zoltan Szalai
Summary: The study investigated the presence of PhACs in tap water from Budapest metropolitan region derived from the Danube, finding that most PhAC concentrations were lower than expected. The risk assessment showed that all investigated PhACs pose a negligible risk to consumers in the urban area.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Chaima Miled, Romain Chesnaux, Julien Walter, Lamine Boumaiza, Maxime C. Pare
Summary: This paper reports on the estimation of groundwater transit time through a saturated granular unconfined aquifer in an agricultural region. A multi-technique approach, including analytical, hydrogeochemical, and numerical methods, is applied to determine groundwater flow. The results show that the approach is robust and can provide accurate assessments of groundwater transit time, which is important for sustainable groundwater management and effective environmental planning in agricultural areas.
HYDROGEOLOGY JOURNAL
(2023)
Article
Environmental Sciences
Magali F. Nehemy, Jason Maillet, Nia Perron, Christoforos Pappas, Oliver Sonnentag, Jennifer L. Baltzer, Colin P. Laroque, Jeffrey J. McDonnell
Summary: Previous studies on tree water source partitioning have mostly focused on the growing season, leaving little known about the source of tree transpiration before, during, and after snowmelt. This study investigates the water use of boreal forest trees during spring snowmelt, particularly after winter stem shrinkage. The results show that snowmelt is a significant source for stem rehydration and transpiration in the boreal forest during the spring onset.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Environmental
Christine Pham, Ricardo Medina, Megan H. Plumlee
Summary: This study evaluated the effect of an epoxy liner on the clogging potential of water conveyed through a pipeline. The results showed that the epoxy liner can effectively reduce the clogging potential of recycled water, likely by reducing the accumulation of particles and biomass load during pipeline transit.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Geology
Yueqing Xie, Andrew J. Love, Craig T. Simmons, Adrian Costar, Jichun Wu
Summary: The transition from the Pleistocene to the Holocene resulted in reduced groundwater recharge in arid and semiarid regions worldwide. This study found that while the hydraulics of groundwater systems changed in response to declining recharge, the age patterns remained largely unchanged throughout the Holocene period. This has important implications for hydrogeologic analyses and suggests the need to consider the spatial and temporal mismatch between age and hydraulics when calibrating models or computing recharge.
Article
Water Resources
Oscar Castro-Orgaz, Francisco N. Cantero-Chinchilla, Juan V. Giraldez, Willi H. Hager
Summary: Regional groundwater flow forecasting is accomplished through numerical methods using model equations based on Darcy's law and the continuity equation. These equations are solved using finite difference, finite element, and boundary element methods. The solution of this model is complex and subject to instability problems, especially in vertical planes near highly curved water tables. A technique using mappings is proposed to simplify the computations and avoid mesh generation problems. The sigma mapping, commonly used in modeling water waves, is successfully applied to seepage flows with both steady and unsteady water tables, considering recharge from rainfall or artificial sources.
ADVANCES IN WATER RESOURCES
(2023)
Article
Environmental Sciences
E. A. Parker, S. B. Grant, Y. Cao, M. A. Rippy, K. J. McGuire, P. A. Holden, M. Feraud, S. Avasarala, H. Liu, W. C. Hung, M. Rugh, J. Jay, J. Peng, S. Shao, D. Li
Summary: This study explores the use of unsteady transit time distribution theory in modeling solute transport in biofilters and demonstrates its accuracy in reproducing breakthrough concentrations. The research shows that more than half of the water in storage at any given time is from the most recent storm, while the rest is a mixture of earlier storms.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Gang Lin, Jixin Qiao, Peter Steier, Magnus Danielsen, Kjartan Guonason, Hans Pauli Joensen, Colin A. Stedmon
Summary: This study explores a new approach using anthropogenic radioisotopes as tracers to estimate the transit time of Atlantic water. By analyzing the concentration variations of different radioisotopes, the transit times of Atlantic water in the coast of Greenland, Iceland, and Faroe Islands were estimated. The results of this study provide an independent method for estimating the transit time of Atlantic water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Civil
Jianfeng Gou, Simin Qu, Peng Shi, Huade Guan, Hai Yang, Zhicai Zhang, Jintao Liu, Zhiguo Su
Summary: Understanding the seasonality of hydrological fluxes and preferential flow is crucial for studying the fate and transport of contaminants in a watershed. In this study, different StorAge Selection (SAS)-based rainfall-runoff models were compared for a Moso bamboo watershed in the East Asian monsoon climate. The results show that a two-parallel-reservoir flow module effectively captures the temporal variation in streamflow. The inclusion of SAS functions improves the performance of the models, especially when applied to both reservoir outflows. The addition of SAS functions for ET fluxes also leads to minor improvements in performance. The study highlights the seasonal variation of preferential flow for deep drainage and lower reservoir outflow, with more young water during the East Asian summer monsoon period.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Angelique Poulain, Vincent Marc, Marina Gillon, Anne-Laure Cognard-Plancq, Roland Simler, Milanka Babic, Marc Leblanc
Summary: The Barthelasse alluvial aquifer, which supplies water to 180,000 inhabitants, relies 100% on water from the Rhone and is vulnerable to pollution from the river. The presence of the Girardon unit disrupts hydraulic exchanges between the river and the water table, impacting the propagation of contaminants.
Article
Geosciences, Multidisciplinary
Arianna Borriero, Rohini Kumar, Tam V. Nguyen, Jan H. Fleckenstein, Stefanie R. Lutz
Summary: Transit time distributions (TTDs) of streamflow are important for understanding flow and solute transport. This study provides a comprehensive analysis of TTD uncertainty resulting from different model setups. The study finds that the chosen model setup significantly affects the simulation of TTDs and reveals a large uncertainty in the simulated TTDs.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Peshawa Al-Jaf, Martin Smith, Friederike Gunzel
Summary: The study focused on flow mechanisms in the Chalk unsaturated zone in South East England, finding that groundwater response to rainfall is slower during dry seasons and faster during wet seasons. Rapid responses were observed at NHB and PE sites during wet seasons, while a slower response was observed at an urbanized site (PP). The study suggests that fracture and karstic flow processes play a role in water conduction in addition to matrix flow.
Article
Geosciences, Multidisciplinary
Thibaut Garin, Bruno Arfib, Bernard Ladouche, Julio Goncalves, Benoit Dewandel
Summary: The study uses the Theis solution to estimate hydraulic parameters of porous aquifers and diagnostic plots on log-derivative drawdown to identify flow regimes and aquifer heterogeneities, leading to plausible conceptual models. Further modeling is needed due to nonuniqueness of the drawdown log-derivative signal. The approach is applied to a complex alluvial plain in France, showing the importance of analyzing pumping test data to explore the 3D architecture of the fluvial reservoir.
HYDROGEOLOGY JOURNAL
(2022)
Article
Engineering, Chemical
Tomas Aquino, Camille Bouchez, Tanguy Le Borgne
Summary: Concentration fields in porous media often show large fluctuations due to physical and chemical heterogeneity. Quantifying concentration variability is important for many applications, but little is known about its evolution under the joint action of transport and reaction. In this study, we investigate the impact of diffusion on the statistics of concentrations and derive a dynamical equation for their time evolution.
TRANSPORT IN POROUS MEDIA
(2023)
Article
Geosciences, Multidisciplinary
Antonin Bilau, Dorian Bienveignant, Yann Rolland, Stephane Schwartz, Nicolas Godeau, Abel Guihou, Pierre Deschamps, Xavier Mangenot, Benjamin Brigaud, Louise Boschetti, Thierry Dumont
Summary: The timing of fault activity in the frontal part of orogenic systems can be determined using a combination of U-Pb dating and stable isotope composition methods. This study successfully applied this methodology to understand the deformation timing of subalpine massifs fold and thrust belts. The analysis revealed variations in fluid temperature and composition, indicating deep underthrusting and exhumation in some areas. The dating of calcites showed multiple deformation events, highlighting the importance of inherited structures. The results provide valuable insights into the mountain building process.
EARTH-SCIENCE REVIEWS
(2023)
Article
Environmental Sciences
Remadji Rirongarti, Florence Sylvestre, Francoise Chalie, Christine Pailles, Jean-Charles Mazur, Abdallah Mahamat Nour, Wulfran Barthelemy, Helene Mariot, Thijs Van der Meeren, Chloe Poulin, Pierre Deschamps, Moussa Abderamane
Summary: This study used diatoms as bio-indicators to investigate the water condition in the Ounianga lakes and developed a predictive model for conductivity using these diatoms. The distribution of diatoms in the lakes was closely linked to water-column physical and chemical conditions, especially conductivity. Through multivariate analysis and weighted averaging method, a strong conductivity prediction model was developed, which provided better inferences for past conductivity using diatoms from lake sediment records in the region.
JOURNAL OF PALEOLIMNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Boubacar Bah, Nicolas E. Beaudoin, Olivier Lacombe, Jean-Pierre Girard, Claude Gout, Nicolas Godeau, Pierre Deschamps
Summary: The timing of porosity destruction in reservoir rock is crucial for hydrocarbon exploration. This study uses a multi-proxy approach to determine the absolute timing of mechanical compaction, pressure-solution, and cementation in the syn-rift Barremian TOCA Fm. The results show that early cementation played a significant role in limiting the effect of mechanical compaction, while chemical compaction-reprecipitation contributed to a larger percentage of porosity destruction. The study also reveals that burial-related pressure-solution occurred within a specific depth range and timeframe. This case study suggests that early diagenetic processes have a major impact on reservoir properties in bioclastic carbonate formations like the TOCA Fm.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Anies Zeboudj, Boubacar Bah, Olivier Lacombe, Nicolas E. Beaudoin, Claude Gout, Nicolas Godeau, Jean-Pierre Girard, Pierre Deschamps
Summary: The study analyzed an offshore wellbore core to investigate the paleostress history and associated deformation mechanisms affecting passive margins. By combining various methods including stylolite roughness inversion, fracture analysis, U-Pb geochronology, and burial modeling, the orientations and magnitudes of stresses were determined over time, with a focus on the impact of salt tectonics.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Valentine Schaaff, David Sebag, Matthew Makou, Vincent Grossi, Ingrid Antheaume, Bruno Hamelin, Yannick Garcin, Benjamin Ngounou Ngatcha, Pierre Deschamps, Guillemette Menot
Summary: Organic compounds are widely used in paleoclimatic and paleoenvironmental reconstructions, but interpreting bulk organic proxies is complicated due to various factors and diagenetic alteration. The authors propose a simple model to remove the decomposition signal and discuss the influence of different parameters on residual data. Their approach allows extraction of paleoenvironmental information from decomposition-prone bulk organic proxies.
ORGANIC GEOCHEMISTRY
(2023)
Article
Geography, Physical
Nazim Semmani, Francois Fournier, Jean-Pierre Suc, Severine Fauquette, Nicolas Godeau, Abel Guihou, Speranta-Maria Popescu, Mihaela Carmen Melinte-Dobrinescu, Christophe Thomazo, Lionel Marie, Pierre Deschamps, Jean Borgomano
Summary: New insights into the geodynamic evolution, paleogeographic framework, and paleoclimatic setting of the lacustrine basins in Southeast France during the Upper Eocene-Oligocene period have been provided. The integrative approach combining geochronology, micropaleontology, and stable isotope analyses helped establish a chronostratigraphic framework and understand the depositional environments. The findings also revealed evidence of marine intrusions and regional climate cooling during this time.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geography, Physical
Abdallah Nassour Yacoub, Florence Sylvestre, Abderamane Moussa, Philipp Hoelzmann, Anne Alexandre, Michele Dinies, Francois Chalie, Christine Vallet-Coulomb, Christine Pailles, Frank Darius, Corinne Sonzogni, Martine Couapel, Jean-Charles Mazur, Stefan Kroepelin
Summary: The study reconstructs the climate of the African Holocene Humid Period (AHHP) in the central Sahara and identifies two distinct lacustrine episodes. The findings provide evidence for the existence of the AHHP and the hydroclimate changes during this period.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Antonin Bilau, Yann Rolland, Thierry Dumont, Stephane Schwartz, Nicolas Godeau, Abel Guihou, Pierre Deschamps
Summary: The uplift of Provence in the early Late Cretaceous led to the formation of the Durance Isthmus. Through U-Pb dating of calcite in compressional structures related to Pyrenean foreland compression in Provence, it is found that north-south shortening occurred at the same time as the emersion of the Durance Isthmus, with top-to-the-North to northwest thrusts developed between 97 and 90 million years ago. This large-scale event, observed from the Pyrenees to the Middle-East regions, is interpreted as a precursor to the reorganization of the Africa-Europe plates. The change in tectonic style and shortening amount between Provence and Pyrenees is attributed to the sinistral reactivation of the NE-SW Cevennes and Nimes faults, acting as transform boundaries in this early collisional context.
Article
Archaeology
Clement Flaux, Sabrina Save, Maxime Scrinzi, Nicolas Minvielle Larousse, Christophe Vaschalde, Audrey Renaud, Margaux Tillier, Abel Guihou, Pierre Deschamps, Alain Veron
Summary: The excavation of a palaeochannel at the Vistre de la Fontaine 2-2 archaeological site in southeastern France revealed a 2,500-year accumulation sequence. Analysis of the alluvial sediments showed significant lead contamination during the Early Roman Empire, with concentrations 100 times higher than the local background. The uniform isotopic signature suggests unchanged ore sources, possibly from the Massif Central or Great Britain. This research highlights the persistence of ancient contamination and the importance of fluvial sedimentary archives in documenting waste history.
JOURNAL OF ROMAN ARCHAEOLOGY
(2023)
Article
Water Resources
Souleyman Abba, Bruno Hamelin, Jean-Luc Michelot, Yannick Garcin, Pierre Deschamps
Summary: This study investigates the hydrological and geochemical characteristics of volcanic lakes in the Cameroon volcanic line. The results show that each lake has a distinct geochemical and isotopic signature, which is influenced by the contribution of watersheds and the partitioning between evaporation and outflow. Sensitivity analysis of classical budget equations suggests that the standard model needs to be modified to explain the data. A conceptual model is proposed to better constrain the different fluxes in these lakes.
HYDROLOGICAL PROCESSES
(2023)
Article
Geography, Physical
J. Weil-Accardo, P. Boyden, A. Rovere, N. Godeau, N. Jaosedy, A. Guihou, M. Humblet, M. N. Rajaonarivelo, J. Austermann, P. Deschamps
Summary: The study investigates the geological sea-level proxies from previous interglacials to understand the future sea-level changes under warmer climate conditions. The research focuses on the Western Indian Ocean, specifically the island nation of Madagascar, which has been less explored in comparison to other tropical oceans. The findings provide paleo relative sea level history during the last interglacial period, suggesting that the global mean sea level did not exceed 3 meters above the modern level.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Ecology
Claudia Voigt, Anne Alexandre, Ilja M. Reiter, Jean-Philippe Orts, Christine Vallet-Coulomb, Clement Piel, Jean-Charles Mazur, Julie C. Aleman, Corinne Sonzogni, Helene Miche, Jerome Ogee
Summary: By using a model-data approach, the parameters controlling the triple oxygen isotope composition of grass leaf water and phytoliths were investigated. The traditional steady-state model accurately predicted the daytime leaf water isotope composition, but was sensitive to uncertainties in leaf-to-air temperature difference. Deviations from isotope steady-state at night can be predicted by a non-steady-state model. The study also confirmed the applicability of the O-17-excess of phytoliths as a proxy for atmospheric relative humidity.
