Article
Environmental Sciences
Sergi Molins, Daniil Svyatsky, Zexuan Xu, Ethan T. Coon, J. David Moulton
Summary: Despite the widespread use of integrated hydrology models, consideration of multicomponent reactive transport is still uncommon. This study presents a flexible multiphysics framework that facilitates the coupling of integrated transport and reactions in the hydrology model. The implementation is demonstrated with two example simulations.
WATER RESOURCES RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
K. De Vriendt, T. Le Borgne, M. Pool, M. Dentz
Summary: This article presents an analytical model for predicting the mixing dynamics along the interface of steady-state flow in coastal aquifers. The model accurately captures the non-monotonic evolution of mixing width and mixing rates, offering a new framework for understanding and modeling mixing and reaction processes in coastal aquifers.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Water Resources
Riccardo Sprocati, Andrea Gallo, Marie Boeskov Caspersen, Massimo Rolle
Summary: Electrokinetic (EK) techniques show great potential for in situ subsurface remediation of organic and inorganic contaminants in porous media. However, the mechanisms governing EK applications in porous media are complex and involve various processes. This study investigates the interactions between density driven effects and electrokinetic transport in permeable porous media.
ADVANCES IN WATER RESOURCES
(2023)
Article
Environmental Sciences
K. Mosthaf, M. Rolle, U. Petursdottir, J. Aamand, P. R. Jorgensen
Summary: This study characterized flow and transport processes in fractured/clayey tills, revealing contrasting transport behavior and solute migration time scales. The experiments demonstrated that transport through fractures/macropores can be dominant in some cases, while matrix advection and diffusion play a significant role in others. By developing 3D models and integrating experimental parameters, the study quantitatively interpreted the prevalent controls on contaminant transport in solute migration processes.
WATER RESOURCES RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Alraune Zech, Peter Dietrich, Sabine Attinger, Georg Teutsch
Summary: Aquifer heterogeneity and data scarcity pose challenges for accurate solute transport prediction. This study introduces a hierarchical conceptualization strategy for hydraulic conductivity to integrate aquifer heterogeneity into quantitative flow and transport modeling.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2021)
Article
Mechanics
Zhipeng Du, Jiajun Chen, Shengnan Ke
Summary: Adding an environmental remediation modifier-polymer solution to a Newtonian fluid can enhance remediation efficiency by expanding the distribution of remediation agents injected in situ into saturated aquifers. This study used a two-dimensional sandbox to simulate the aquifer and analyzed the transverse mixing of the plume under different fluid rheology and heterogeneity conditions. The results showed that the anisotropic stress generated by polymer fluid deformation and higher-viscosity polymers had significant effects on the distribution of the plume. Xanthan gum enhanced the transverse distribution of the plume through various mechanisms. It was also found that shear-thinning fluid improved the effect of transverse dispersion and mixing under heterogeneous conditions.
Article
Environmental Sciences
Alexis Neven, Philippe Renard
Summary: This paper presents a methodology for integrating geological, geophysical, and hydrogeological data to develop a robust and accurate groundwater model. The methodology combines the Ensemble Smoother with Multiple Data Assimilation algorithm and hierarchical geological modeling approach. By computing forward responses in lower-dimensional spaces, the models take into account multiple data sources and regional conceptual geological knowledge.
WATER RESOURCES RESEARCH
(2023)
Article
Geography, Physical
Bo Gao, Ethan T. Coon
Summary: Permafrost degradation within a warming climate poses a significant threat to the environment and human communities. This study investigates the impact of commonly made assumptions on permafrost hydrological processes, providing a better understanding for model selection.
Article
Geosciences, Multidisciplinary
Jennifer C. McIntosh, Grant Ferguson
Summary: The maximum depths of meteoric water circulation across North America vary greatly, with the deepest circulation in Western North America and shallower circulation in sedimentary and shield-type environments with subdued topography. The presence of active flow systems in the upper few kilometers of the Earth's crust and stagnant brines trapped by negative buoyancy provides a new framework for understanding deep groundwater systems.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Engineering, Civil
Theodore D. Eyster, Mark S. Johnson, Sarah M. Yarnell, Christopher S. Lowry
Summary: Dam removal is becoming more common as people seek to restore the environmental conditions created by dams. However, limited studies have been done on the effects of dam removal on meadow ecosystems. This study used a groundwater model to assess the impact of dam removal on groundwater and meadow systems in Van Norden Meadow in California. The results showed that dam removal had a slight decrease in the water table of the lower meadow and led to changes in baseflow drainage and evapotranspiration.
WATER RESOURCES MANAGEMENT
(2023)
Article
Environmental Sciences
Melissa Sherman, Johanna Hripto, Erin K. Peck, Arthur J. Gold, Marc Peipoch, Paul Imhoff, Shreeram Inamdar
Summary: The study found that milldams have significant impacts on riparian groundwater gradients, flow directions, and mixing regimes, which vary under different hydrological conditions.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Daniel R. Lester, Marco Dentz, Prajwal Singh, Aditya Bandopadhyay
Summary: This study compares the transverse macrodispersion in porous media with different conductivity structures under purely advective transport. It is found that porous media with smooth, locally isotropic hydraulic conductivity exhibit zero transverse macrodispersion, while non-smooth or locally anisotropic conductivity fields can generate transverse macrodispersion. These findings provide insights into the mechanisms that govern transverse macrodispersion in groundwater flow.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Civil
Kun Zhang, Anthony J. Parolari
Summary: The study investigates the subsurface fate of stormwater infiltration enhanced by green infrastructure (GI) and its impact on the overall water balance. A physically based hydrologic model is developed and applied to a sewershed near Milwaukee, WI, to quantify the partitioning of infiltrated stormwater. The findings show that GI implementation can reduce surface runoff and peak flow in urban sewer systems, but its impact on rainfall-derived inflow and infiltration (RDII) is relatively small.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Nicholas E. Thiros, W. Payton Gardner, Kristopher L. Kuhlman
Summary: Non-uniqueness in groundwater model calibration poses uncertainties to predictions. This study explores the use of environmental tracer information in constraining groundwater model parameters, finding that utilizing tracer concentrations can reduce uncertainty and improve predictive accuracy. Direct assimilation of environmental tracer concentrations into model parameter estimation procedures shows potential benefits in calibrating groundwater models.
WATER RESOURCES RESEARCH
(2021)
Article
Engineering, Civil
Hyoun-Tae Hwang, Eunhee Lee, Steven J. Berg, Edward A. Sudicky, Yongcheol Kim, Dongkyu Park, Hyeonju Lee, Changhui Park
Summary: This study presents a decision support method that quantifies the effects of water management on surface and groundwater systems using an integrated model, revealing the vulnerability of the hydrologic systems in the Geum River Basin during dry seasons. Application of a weir removal scenario is suggested to minimize the impact on the ecosystem of the Geum River.
JOURNAL OF HYDROLOGY
(2021)
Article
Mechanics
Matthias Hinze, Sinan Xiao, Andre Schmidt, Wolfgang Nowak
Summary: This study evaluates and analyzes creep testing results on M2 salt concrete and determines the parameters of the fractional viscoelastic constitutive law using the Bayesian inversion method for reliable prediction of concrete behavior.
MECHANICS OF TIME-DEPENDENT MATERIALS
(2023)
Article
Computer Science, Interdisciplinary Applications
Ishani Banerjee, Peter Walter, Anneli Guthke, Kevin G. Mumford, Wolfgang Nowak
Summary: Bayesian model selection ranks competing models by computing Bayesian Model Evidence (BME) against test data. Computing BME can be problematic, and we propose a method called the Method of Forced Probabilities (MFP) to address this issue. We demonstrate the effectiveness of our approach on simulating gas migration models.
COMPUTATIONAL GEOSCIENCES
(2023)
Article
Water Resources
Florentin Hofmeister, Floriana Graziano, Giorgia Marcolini, Winfried Willems, Markus Disse, Gabriele Chiogna
Summary: This study examines hydrometeorological time series in two high-elevation Alpine catchments and identifies trends, change points, and inhomogeneities. The results show that these statistical properties of the time series can introduce uncertainty into hydrological model results, with inhomogeneities having a stronger influence on cryosphere processes than on runoff generation.
HYDROLOGICAL SCIENCES JOURNAL
(2023)
Article
Environmental Sciences
Mohammad Alqadi, Ala Al Dwairi, Pablo Merchan-Rivera, Gabriele Chiogna
Summary: The article introduces a new software called DeMa, which aims to support wellfield managers in their decision-making processes. This software combines well maintenance, operation, design, installation, and cost data with hydrological field measurements, differentiating itself from other available software. DeMa also provides an effective graphical representation of the data by linking different information.
Article
Water Resources
Riccardo Sprocati, Andrea Gallo, Marie Boeskov Caspersen, Massimo Rolle
Summary: Electrokinetic (EK) techniques show great potential for in situ subsurface remediation of organic and inorganic contaminants in porous media. However, the mechanisms governing EK applications in porous media are complex and involve various processes. This study investigates the interactions between density driven effects and electrokinetic transport in permeable porous media.
ADVANCES IN WATER RESOURCES
(2023)
Article
Engineering, Civil
J. Ashish Manoj, Teresa Perez Ciria, Gabriele Chiogna, Nadine Salzmann, Ankit Agarwal
Summary: Studies have shown that increased extreme precipitation does not directly lead to flooding. This study focuses on understanding the spatial and temporal patterns of the relationship between soil moisture and precipitation in Europe. By using an event-based analysis, the study quantifies the probability of soil moisture preceding precipitation and examines the statistical relationship between joint episodes of soil moisture and precipitation and reported flood events. The results highlight the importance of considering seasonality and interdependencies in flood risk mitigation and provide valuable insights for comprehensive flood risk assessment studies.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Henning Wienkenjohann, Biao Jin, Massimo Rolle
Summary: This study investigates the impact of diffusive-dispersive processes on isotope fractionation of organic contaminants in groundwater. Through experiments and simulations at different scales, the study demonstrates the significant influence of diffusive-dispersive processes on isotope signatures of chlorinated ethene plumes.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Sebastian Schwindt, Sergio Callau Medrano, Kilian Mouris, Felix Beckers, Stefan Haun, Wolfgang Nowak, Silke Wieprecht, Sergey Oladyshkin
Summary: This study investigates the use of Bayesian calibration to identify faulty model setups and parameter combinations. Bayesian calibration utilizes a Gaussian process emulator as a surrogate model, which is faster than the actual numerical model. The results show that Bayesian calibration can describe the quality of calibration and correctness of model assumptions through geometric characteristics of posterior distributions.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Riccardo Sprocati, Andrea Gallo, Henning Wienkenjohann, Massimo Rolle
Summary: This study investigates the effects of temperature on electrokinetic transport in porous media. The results show that an increase in temperature leads to a higher speed of amendments delivery and increased kinetics of degradation reactions. The simulations also reveal a feedback mechanism where higher aqueous conductivity results in increased Joule heating, leading to a faster temperature rise and higher electrolyte conductivity.
JOURNAL OF CONTAMINANT HYDROLOGY
(2023)
Article
Environmental Sciences
Monica Basilio Hazas, Francesca Ziliotto, Jonghyun Lee, Massimo Rolle, Gabriele Chiogna
Summary: This study investigates the effects of fluctuating surface water bodies on solute transport in aquifers. The results show that highly transient boundary conditions lead to a larger area, perimeter, and dilution of solute plumes. The study also identifies different regimes of dilution and reaction domination, characterized by increasing and decreasing plume entropies at different mixing ratios. Furthermore, reactive mixing is enhanced by transient flows, resulting in faster degradation of contaminant plumes compared to steady flow conditions.
JOURNAL OF CONTAMINANT HYDROLOGY
(2023)
Article
Environmental Sciences
Florentin Hofmeister, Brenda Rubens Venegas, Gabriel Sentlinger, Michael Tarantik, Theresa Blume, Markus Disse, Gabriele Chiogna
Summary: Salt dilution is a reliable method for measuring streamflow in creeks, especially downstream of turbulent flow sections. Manual measurements of salt dilution have limitations in observing rare peak flow events. An automated streamflow measuring system was used to overcome these limitations and detect changes in the rating curve caused by erosion and deposition processes. The system's reliability was evaluated using a large dataset and the primary sources of uncertainty were identified.
RIVER RESEARCH AND APPLICATIONS
(2023)
Article
Engineering, Environmental
Muhammad Muniruzzaman, Massimo Rolle
Summary: This study assesses the impact and relevance of microscale electrostatic effects on macroscopic contaminant transport in heterogeneous groundwater systems involving clay zones. The results show that electrostatic mechanisms within clay's diffuse layer can significantly affect contaminant migration, leading to different mass loading/release behaviors. It also emphasizes the significance of considering electrostatic processes in subsurface hydrology to accurately predict contaminant migration.
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
(2023)
Article
Environmental Sciences
Jonas Allgeier, Olaf A. A. Cirpka
Summary: Modern physics-based subsurface-flow models often require many parameters and computationally costly simulations. To expedite the calibration process, we propose using surrogate models based on Gaussian Process Regression (GPR), which allows estimation of the posterior parameter distribution using Markov-Chain Monte Carlo (MCMC) simulations. We compared the GPR-based approach to a Neural Posterior Estimation (NPE) scheme and found that the GPR-based MCMC approach reproduced the data better.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Maria Fernanda Morales Oreamuno, Sergey Oladyshkin, Wolfgang Nowak
Summary: Bayesian model selection (BMS) and Bayesian model justifiability analysis (BMJ) provide a statistically rigorous framework for comparing competing models using Bayesian model evidence (BME). However, BME-based analysis has limitations in accounting for a model's predictive performance after calibration and in comparing models using different calibration subsets. To address these limitations, we propose augmenting BMS and BMJ analyses with information-theoretic measures such as expected log-predictive density (ELPD), relative entropy (RE), and information entropy (IE). We demonstrate how these measures, alongside BME, enhance the understanding of the Bayesian updating process and enable objective model comparison using different calibration datasets.
WATER RESOURCES RESEARCH
(2023)
Article
Computer Science, Information Systems
Christoph Dibak, Wolfgang Nowak, Frank Duerr, Kurt Rothermel
Summary: Numerical simulations on mobile devices are important for engineers and decision makers, but providing simulation results is challenging due to complexity and limited resources. This article presents an optimized approach using surrogate models and data assimilation to reduce communication overhead. Evaluation shows that the approach is 6.5 times faster than streaming from the server.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2023)
