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Experimental Study of Non-Darcian Flow Characteristics in Low-Permeability Coal Pillar Dams Groundwater (IF 2.6) Pub Date : 2024-03-11 Xu Li, Peng Zhu, Konghui Zuo, Zhang Wen, Qi Zhu, Qiang Guo, Hamza Jakada
The safe operation of underground reservoirs and environmental protection heavily rely on the water flow through coal pillar dams in coal mines. Meanwhile, research on the flow characteristics in coal pillar dams has been limited due to their low hydraulic conductivity. To address this gap, this study assembled a novel seepage experimental device and conducted a series of carefully designed seepage
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Implications of the Mississippi v. Tennessee Supreme Court Decision for Interstate Groundwater Management Groundwater (IF 2.6) Pub Date : 2024-03-04 Nimisha Wasankar, T. Prabhakar Clement
Groundwater allocation is rapidly becoming a contentious water resource management problem around the world. It is anticipated that the effects of climate change would further aggravate this problem. Conflicts over the distribution of freshwater are expected to increase as stakeholders want to access more groundwater to meet their growing demands. In the United States, water conflicts are settled through
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Regional vs. Local Isotopic Gradient: Insights and Modeling from Mid-Mountain Areas in Central Italy Groundwater (IF 2.6) Pub Date : 2024-02-16 Alberto Tazioli, Davide Fronzi, Stefano Palpacelli
Mountainous zones are often characterized by complex orography and contacts between different aquifers that usually complicate the use of isotope hydrology techniques. The Apennine chain (Italy) and 10 mountain and mid-mountain areas belonging to it are the objective of this study. An original isotopic data treatment, able to identify the most probable recharge area for several springs/springs' groups/wells
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Deep-Seated Fluids in Thermal Waters Before and After the 2016 Kumamoto Earthquakes Groundwater (IF 2.6) Pub Date : 2024-02-06 Fumiaki Tsunomori, Noritoshi Morikawa, Masaaki Takahashi
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Groundwater Science Could Use a New Term: Transportivity Groundwater (IF 2.6) Pub Date : 2024-02-07 Ward Sanford
The travel time for a parcel of groundwater from the water table to a well or stream is an important quantity for groundwater characterization. This is especially true if we want to understand and predict the movement of contaminants from sources at the land surface (e.g., fertilizer or road salt) through shallow aquifers. The migration and travel time of contaminant solutes depend on both the hydraulic
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Surface Deformation and Seismicity Linked to Fluid Injection in the Raton Basin Groundwater (IF 2.6) Pub Date : 2024-02-01 Cameron R. Chambers, Megan R. M. Brown, Scott M. Stokes, Shemin Ge, Elizabeth A. Menezes, Kristy F. Tiampo, Anne F. Sheehan
It is suggested that in addition to seismicity deep fluid injection may cause surface uplift and subsidence in oil and gas-producing regions. This study uses the Raton Basin as an example to investigate the hydromechanical processes of surface uplift and subsidence during wastewater injection. The Raton Basin, in southern central Colorado and northern central New Mexico, has experienced wastewater
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MODPATH-RW: A Random Walk Particle Tracking Code for Solute Transport in Heterogeneous Aquifers Groundwater (IF 2.6) Pub Date : 2024-01-27 Rodrigo Pérez-Illanes, Daniel Fernàndez-Garcia
Random walk particle tracking (RWPT) is a discrete particle method that offers several advantages for simulating solute transport in heterogeneous geological systems. The formulation is a discrete solution to the advection-dispersion equation, yielding results that are not influenced by grid-related numerical dispersion. Numerical dispersion impacts the magnitude of concentrations and gradients obtained
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Influence of Geometric Characteristics on Water Flow and Solute Transport at Fracture Intersections Groundwater (IF 2.6) Pub Date : 2024-01-25 Jiazhong Qian, Xueqi Liang, Yong Liu, Lei Ma, Xiangquan Li, Chunchao Zhang
Laboratory experiments and numerical simulations were performed to explore the influence of intersection geometry on fluid flow and solute transport in fractures. Fractures were engraved and sealed into an acrylic plate and two orthogonal intersections with different geometry were constructed. The effects of curvature and relative shear displacement at intersections on preferential flow and solute
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Groundwater Week 2023 Groundwater (IF 2.6) Pub Date : 2024-01-09 Mike Price
Groundwater Week 2023 took place December 5–7, 2023 in Las Vegas, Nevada, and drew its largest attendance in the history of NGWA. The annual event saw 6642 groundwater professionals take part, making it the biggest show in the Association history. Attendees came from 40 countries and all 50 states. The second largest show took place in 2006 with 6612 attendees. “We're proud to have celebrated our 75th
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Groundwater Modeling in a Changing World: MODFLOW-and-More 2022 Special Issue Groundwater (IF 2.6) Pub Date : 2023-12-25 Mary C. Hill, Reed M. Maxwell, Matthew Tonkin
The “MODFLOW-and-More” (MF&M) conference series arose from the vision of Chunmiao Zheng, Eileen Poeter, and Mary C. Hill. MF&M convened at the Colorado School of Mines on nine occasions commencing in 1998. Past attendees recall friendly (sometimes heated!) debates, lunch with luminaries—like Gregory J. Hobbs, Colorado State Supreme Court Justice, and James Eklund, lead negotiator of the Colorado River
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Mechanisms of Non-Fresh Groundwater Presence at Water Tables in Highly Permeable Coastal Aquifers Groundwater (IF 2.6) Pub Date : 2023-12-22 Satoshi Tajima, Jiaqi Liu, Tomochika Tokunaga
Coastal aquifers with high hydraulic conductivities on the order of 10−2 m s−1 have unconventional salinity distributions with the presence of non-fresh groundwater at the water table over a wide swath near the coast. This study aims to unravel the mechanisms underlying the phenomenon via numerical simulations for variably saturated, density-driven flow and solute transport in porous media. The simulation
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Time-Lapse Geophysical Measurements for Monitoring Coastal Groundwater Dynamics in an Unconfined Aquifer Groundwater (IF 2.6) Pub Date : 2023-12-22 Jeeban Panthi, Thomas Boving, Soni M. Pradhanang, Mamoon Ismail
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Development of the Groundwater Concept Inventory to Measure Groundwater Knowledge in a General Audience Groundwater (IF 2.6) Pub Date : 2023-12-18 Ann Ojeda, Stephanie R. Rogers, Charlotte Jannach, Karen S. McNeal
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Evaluating Flow Distribution in a Multiaquifer Recharge Well Using an In Situ Flowmeter Groundwater (IF 2.6) Pub Date : 2023-12-12 Meredith B. Martinez, Mark A. Widdowson
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An Iterative Method of Modeling Pump-Treat-Inject System with “Partial Treatment” Groundwater (IF 2.6) Pub Date : 2023-12-07 Jim Zhang, Yiding Zhang, Franklin W. Schwartz, Massoud Karimi
Pump-and-treat technologies are widely used in groundwater remediation and site cleanup. Such technologies involve pumping contaminated groundwater to the surface for treatment. Following treatment, the water is often reinjected back into the aquifer (referred to as pump-treat-inject or PTI) for potential reuse. The treatment system is often designed to remove dissolved-phase contaminants in groundwater
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New Insights into the Formation and Properties of Wellbore Skin: Why We Have to Rethink the Concept Groundwater (IF 2.6) Pub Date : 2023-12-01 Georg J. Houben, Axel Lamparter, Kristian Ufer, Christin Damian, Daniel Boz
The deposition of fine-grained material of low permeability on the borehole wall during drilling (wellbore skin) is a common problem affecting the operation and efficiency of water wells. Here, we present new data and novel insights from four excavated dewatering wells from a lignite surface mine. All wells have the same age, are of similar construction, and were sampled at two different depths each
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Groundwater for People and the Environment: A Globally Threatened Resource Groundwater (IF 2.6) Pub Date : 2023-11-21 Hugo A. Loaiciga, Ryan Doh
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Impact of Type and Shape of Microplastics on the Transport in Column Experiments Groundwater (IF 2.6) Pub Date : 2023-11-20 Cheyanne A. Schenkel, Megan R.M. Brown, Melissa E. Lenczewski
The pervasive nature of plastic and the longevity of plastics leaves a legacy of microplastics (MPs) that contaminate our environment, including drinking water sources. Although MPs have been documented in every environmental setting, a paucity of research has focused on the transport and fate of MPs in groundwater. Previous field and laboratory studies have shown that MPs can migrate through aquifer
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Towards Improved Remedial Outcomes in Categorical Aquifers with an Iterative Ensemble Smoother Groundwater (IF 2.6) Pub Date : 2023-11-09 Prashanth Khambhammettu, Philippe Renard, John Doherty, Jeremy White, Marc Killingstad, Michael Kladias
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Delineation of a PFOA Plume and Assessment of Data Gaps in its Conceptual Model Using PlumeSeeker™ Groundwater (IF 2.6) Pub Date : 2023-11-06 Metin Ozbek, Nathan Voorhies, Lucas Howard, Ryan Swanson, Tad Fox
An accurate conceptual site model (CSM) and plume-delineation at contamination sites are pre-requisites for successful remediation and for satisfying regulators and stakeholders. PlumeSeeker™ is well-suited for assessing data gaps in CSMs by using available site data and for identifying the optimal number and locations of sampling locations to delineate contaminant plumes. It is an enhancement of a
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Borehole Nuclear Magnetic Resonance Estimation of Specific Yield in a Fractured Granite Aquifer Groundwater (IF 2.6) Pub Date : 2023-11-06 Stephanie N. Phillips, Bradley Carr, Ye Zhang, Brady Flinchum, Shuangpo Ren
In this study, we introduce a novel field-based method to estimate specific yield (Sy) in fractured, low-porosity granite aquifers using borehole nuclear magnetic resonance (bNMR). This method requires collecting a bNMR survey immediately following a pump test, which dewaters the near-borehole fractures. The residual water content measured from bNMR is interpreted as “bound” and represents the specific
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Hydrogeochemical Evaluation of Aquifer Storage and Recovery in Edwards Aquifer, New Braunfels, Texas Groundwater (IF 2.6) Pub Date : 2023-11-05 Christophe Wakamya Simbo
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Effects of Auto-Adaptive Localization on a Model Calibration Using Ensemble Methods Groundwater (IF 2.6) Pub Date : 2023-10-28 Jonathan P. Traylor, Randall J. Hunt, Jeremy White, Michael N. Fienen
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An Agricultural Package for MODFLOW 6 Using the Application Programming Interface Groundwater (IF 2.6) Pub Date : 2023-10-26 Joshua D. Larsen, Christian D. Langevin, Joseph D. Hughes, Richard G. Niswonger
An agricultural water use package has been developed for MODFLOW 6 using the MODFLOW Application Programming Interface (API). The MODFLOW API Agricultural Water Use Package (API-Ag) was based on the approach to simulate irrigation demand in the MODFLOW-NWT and GSFLOW Agricultural Water Use (AG) Package. The API-Ag Package differs from the previous approach by implementing new features and support for
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Approximation of van Genuchten Parameter Ranges from Hydraulic Conductivity Data Groundwater (IF 2.6) Pub Date : 2023-10-23 Aaron Peche, Georg Houben, Sven Altfelder
The use of retention function and relative conductivity function is essential for the calculation of flow in a variably saturated media using the Richards equation. A widely used mathematical model for this is the Mualem-van Genuchten model which requires the shape parameters α $$ \alpha $$ and n $$ n $$ . These, however, are difficult to obtain. When data is scarce, α $$ \alpha $$ and n $$ n $$ are
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An Automatic-Vertical Profile Monitoring System for Fresh–Saline Water Zones in Coastal Aquifer Groundwater (IF 2.6) Pub Date : 2023-10-17 Woo-Hyun Jeon, Hee Sun Moon, Jungwon Choi, Byeongju Jung, Yongcheol Kim, Seho Hwang, Soo-Hyoung Lee
Coastal aquifers are complex systems governed by fresh–saline water interactions and ocean tidal effects. The vertical electrical conductivity (EC) and temperature (T) are general indicators for detecting the fresh–saline water interface (FSI) and sea water intrusion in groundwater wells located in coastal aquifers. In this method brief, we developed a cost-effective Arduino-based automatic-vertical
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Water Table Depth Estimates over the Contiguous United States Using a Random Forest Model Groundwater (IF 2.6) Pub Date : 2023-10-05 Yueling Ma, Elena Leonarduzzi, Amy Defnet, Peter Melchior, Laura E. Condon, Reed M. Maxwell
Water table depth (WTD) has a substantial impact on the connection between groundwater dynamics and land surface processes. Due to the scarcity of WTD observations, physically-based groundwater models are growing in their ability to map WTD at large scales; however, they are still challenged to represent simulated WTD compared to well observations. In this study, we develop a purely data-driven approach
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Urban Thirst and Rural Water: The Saga of the Southern Nevada Groundwater Development Project Groundwater (IF 2.6) Pub Date : 2023-10-04 Norman L. Jones, Alan L. Mayo
In 1989, the Southern Nevada Water Authority (SNWA) launched the Southern Nevada Groundwater Development Project—a bold plan to construct a series of deep wells in east-central Nevada to pump groundwater and send it to the Las Vegas region through 300 miles of pipeline. Before starting work on the project, SNWA conducted an environmental impact study and secured water rights in the valleys. Applications
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Use of Hydrogeochemistry and Isotopes for Evaluation of Groundwater in Qilian Coal Base of China Groundwater (IF 2.6) Pub Date : 2023-10-03 Chongqin Zhao, Xiangquan Li, Zhenxing Wang, Xinwei Hou, Jianfei Ma
The Jiangcang Basin is an important mining area of the former Qilian Mountain large coal base in Qinghai Province, and understanding the groundwater circulation mechanism is the basis for studying the hydrological effects of permafrost degradation in alpine regions. In this study, hydrogeochemical and multiple isotope tracer analysis methods are used to understand the chemical evolution and circulation
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What Can Groundwater Monitoring Tell Us About Gas Migration? A Numerical Modeling Study Groundwater (IF 2.6) Pub Date : 2023-10-01 Kartik Jain, Cole J.C. Van De Ven, K. Ulrich Mayer
Groundwater monitoring to measure a variety of indicator parameters including dissolved gas concentrations, total dissolved gas pressure (TDGP), and redox indicators is commonly used to evaluate the impacts of gas migration (GM) from energy development in shallow aquifer systems. However, these parameters can be challenging to interpret due to complex free-phase gas source architecture, multicomponent
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A Low-Cost Programmable Reversing Flow Column Apparatus for Investigating Mixing Zones Groundwater (IF 2.6) Pub Date : 2023-09-30 Reid E. Buskirk, Peter S. K. Knappett, M. Bayani Cardenas, Saugata Datta, Walter S. Borowski, Itza Mendoza-Sanchez
This note describes the development and testing of a novel, programmable reversing flow 1D (R1D) experimental column apparatus designed to investigate reaction, sorption, and transport of solutes in aquifers within dynamic reversing flow zones where waters with different chemistries mix. The motivation for constructing this apparatus was to understand the roles of mixing and reaction on arsenic discharging
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Hydrogeological Functioning of a Karst Underground River Basin in Southwest China Groundwater (IF 2.6) Pub Date : 2023-09-30 Yongli Guo, Fen Huang, Ping'an Sun, Cheng Zhang, Qiong Xiao, Zhang Wen, Hui Yang
The Maocun underground karst river system in the peak cluster depression is an important source of groundwater in southwest China. Multitracers and high resolution water-level-monitoring technology were used to assess and evaluate the hydrogeological structure and flow dynamics. The results showed that the spatial geological structures of the sites had high heterogeneity. Scatter plots of environmental
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Learning Theories Applied to Teaching and Improving Hydrogeological Conceptualization Groundwater (IF 2.6) Pub Date : 2023-09-29 Shane Brown, Floraliza Bornasal
Conceptual change is the process of developing a new understanding of an idea or related set of ideas and has been researched and theorized extensively in the last few decades. Although there is ongoing debate about how and why conceptual change occurs, all agree that individuals' prior knowledge plays a role, everyone engages differently in the process, and the context of the learning environment
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Continental Scale Hydrostratigraphy: Basin-Scale Testing of Alternative Data-Driven Approaches Groundwater (IF 2.6) Pub Date : 2023-09-28 Danielle Tijerina-Kreuzer, Jackson S. Swilley, Hoang V. Tran, Jun Zhang, Benjamin West, Chen Yang, Laura E. Condon, Reed M. Maxwell
Integrated hydrological modeling is an effective method for understanding interactions between parts of the hydrologic cycle, quantifying water resources, and furthering knowledge of hydrologic processes. However, these models are dependent on robust and accurate datasets that physically represent spatial characteristics as model inputs. This study evaluates multiple data-driven approaches for estimating
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From the Mental to the Conceptual Model: The Challenge of Teaching Hydrogeology in the Field Groundwater (IF 2.6) Pub Date : 2023-09-25 Joaquin Jimenez-Martinez
Field-based learning in hydrogeology enables students to develop their understanding and application of practical methodologies, and to enhance many of the generic skills (e.g., teamwork, problem-solving). However, teaching and learning hydrogeology in general, and especially in the field, presents cognitive difficulties, such as the diversity in student education and experience, the hidden nature
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Continental Scale Hydrostratigraphy: Comparing Geologically Informed Data Products to Analytical Solutions Groundwater (IF 2.6) Pub Date : 2023-09-15 Jackson S. Swilley, Danielle Tijerina-Kreuzer, Hoang V. Tran, Jun Zhang, Chen Yang, Laura E. Condon, Reed M. Maxwell
This study synthesizes two different methods for estimating hydraulic conductivity (K) at large scales. We derive analytical approaches that estimate K and apply them to the contiguous United States. We then compare these analytical approaches to three-dimensional, national gridded K data products and three transmissivity (T) data products developed from publicly available sources. We evaluate these
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Coastal Groundwater-Dependent Ecosystems are Falling Through Policy Gaps Groundwater (IF 2.6) Pub Date : 2023-09-11 Madeleine Dyring, Melissa M. Rohde, Ray Froend, Harald Hofmann
Coastal groundwater-dependent ecosystems (GDEs), such as wetlands, estuaries and nearshore marine habitats, are biodiversity hotspots that provide valuable ecosystem services to society. However, coastal groundwater and associated ecosystems are under threat from groundwater exploitation and depletion, as well as climate change impacts from sea-level rise and extreme flood and drought events. Despite
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MODFLOW as a Configurable Multi-Model Hydrologic Simulator Groundwater (IF 2.6) Pub Date : 2023-09-01 Christian D. Langevin, Joseph D. Hughes, Alden M. Provost, Martijn J. Russcher, Sorab Panday
MODFLOW 6 is the latest in a line of six “core” versions of MODFLOW released by the U.S. Geological Survey. The MODFLOW 6 architecture supports incorporation of additional hydrologic processes, in addition to groundwater flow, and allows interaction between processes. The architecture supports multiple model instances and multiple types of models within a single simulation, a flexible approach to formulating
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A Novel Semi-Analytical Solution of Over-Damped Slug Test in a Three-Layered Aquifer System Groundwater (IF 2.6) Pub Date : 2023-08-30 Mengxiong Cao, Zhang Wen, Gang Chen, Cheng Hu, Qi Zhu, Hamza Jakada
The slug test has been commonly used to estimate aquifer parameters. Previous studies on the slug test mainly focused on a single-layer aquifer. However, understanding the interaction between layers is particularly important when assessing aquifer parameters under certain circumstances. In this study, a new semi-analytical model on transient flow in a three-layered aquifer system with a partially penetrating
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Benefits and Cautions in Data Assimilation Strategies: An Example of Modeling Groundwater Recharge Groundwater (IF 2.6) Pub Date : 2023-08-28 Allen M. Shapiro, Frederick D. Day-Lewis
Assimilating recent observations improves model outcomes for real-time assessments of groundwater processes. This is demonstrated in estimating time-varying recharge to a shallow fractured-rock aquifer in response to precipitation. Results from estimating the time-varying water-table altitude (h) and recharge, and their error covariances, are compared for forecasting, filtering, and fixed-lag smoothing
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Evaluation of Hydraulic Conductivity Estimates from Various Approaches with Groundwater Flow Models Groundwater (IF 2.6) Pub Date : 2023-08-21 Dongwei Sun, Ning Luo, Aaron Vandenhoff, Wesley McCall, Zhanfeng Zhao, Chenxi Wang, David L. Rudolph, Walter A. Illman
Significant efforts have been expended for improved characterization of hydraulic conductivity (K) and specific storage (Ss) to better understand groundwater flow and contaminant transport processes. Conventional methods including grain size analyses (GSA), permeameter, slug, and pumping tests have been utilized extensively, while Direct Push-based Hydraulic Profiling Tool (HPT) surveys have been developed
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Performance of Gradient and Gradient-Free Optimizers in Transient Hydraulic Tomography Groundwater (IF 2.6) Pub Date : 2023-08-21 Syam Chintala, B.V.N. P. Kambhammettu, T. S. Harmya
Sub-surface characterization in fractured aquifers is challenging due to the co-existence of contrasting materials namely matrix and fractures. Transient hydraulic tomography (THT) is proved to be an efficient and robust technique to estimate hydraulic (Km, Kf) and storage (Sm, Sf) properties in such complex hydrogeologic settings. However, performance of THT is governed by data quality and optimization
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muFlowReacT: A Library to Solve Multiphase Multicomponent Reactive Transport on Unstructured Meshes Groundwater (IF 2.6) Pub Date : 2023-07-31 O. Atteia, H. Prommer, D. Vlassopoulos, L. André, G. Cohen
In this paper we present a new reactive transport code for the efficient simulation of groundwater quality problems. The new code couples the two previously existing tools OpenFoam and PhreeqcRM. The major objective of the development was to transfer and expand the capabilities of the MODFLOW/MT3DMS-family of codes, especially their outstanding ability to suppress numerical dispersion, to a versatile
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GroMoPo: A Groundwater Model Portal for Findable, Accessible, Interoperable, and Reusable (FAIR) Modeling. Groundwater (IF 2.6) Pub Date : 2023-07-28 Sam Zipper,Kevin M Befus,Robert Reinecke,Daniel Zamrsky,Tom Gleeson,Sacha Ruzzante,Kristen Jordan,Kyle Compare,Daniel Kretschmer,Mark Cuthbert,Anthony M Castronova,Thorsten Wagener,Marc F P Bierkens
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Impacts of Groundwater Pumping for Hydraulic Fracturing on Aquifers Overlying the Eagle Ford Shale Groundwater (IF 2.6) Pub Date : 2023-07-28 John A. Brien, Gabrielle E. Obkirchner, Peter S. K. Knappett, Gretchen R. Miller, David Burnett, Mukul Bhatia
Hydraulic fracturing (HF) events consume high volumes of water over a short time. When groundwater is the source, the additional pumping by rig/frack supply wells (RFSWs) may impose costs on owners of other sector wells (OSWs) by lowering the hydraulic head. The Carrizo–Wilcox aquifer in south Texas is the main source of water for HF of the Eagle Ford Shale (EFS) Play. The objectives are to assess
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Inorganic Hydrogeochemistry in the 21st Century Groundwater (IF 2.6) Pub Date : 2023-07-22 Chen Zhu, Alan E. Fryar, John Apps
Chemical and isotopic processes occur in every segment of the hydrological cycle. Hydrogeochemistry—the subdiscipline that studies these processes—has seen a transformation from “witch's brew” to credible science since 2000. Going forward, hydrogeochemical research and applications are critical to meeting urgent societal needs of climate change mitigation and clean energy, such as (1) removing CO2
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Control of Structural Landform Evolution on Karst Groundwater Cycle in a Large-Scale Anticlinorium Groundwater (IF 2.6) Pub Date : 2023-07-03 Yu Fan, Huaisong Ji, Ruyang Lu, Junwei Wan, Kun Huang
Structural landform evolution and hydrogeochemical analyses are crucial for understanding the characteristics of karst groundwater systems and the development of deep karst formed by complex aquifers in a tectonic collision zone. Detailed structural landform evolution analysis was carried out along the large-scale anticlinorium to investigate the temporal evolution of karst aquifer systems and karstification
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PEST and AEM Modeling for Data Acquisition Planning Groundwater (IF 2.6) Pub Date : 2023-07-03 Charles McLane
A well-planned field data collection program should be designed to (1) collect a sufficient set of data of the right types at the right locations, and (2) collect a parsimonious set of data to avoid unnecessary costs. Combining PEST and a simple analytic element method (AEM) groundwater flow model for the site of interest provides a relatively simple, low-cost method of developing such a program. AEM
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Automated Estimation of Aquifer Parameters from Arbitrary-Rate Pumping Tests in Python and MATLAB Groundwater (IF 2.6) Pub Date : 2023-07-01 David A. Benson
Inspired by the analysis by Mishra et al. (2012) of variable pumping rate tests using piecewise-linear reconstructions of the pumping history, this article contains a derivation of the convolutional form of pumping tests in which the pumping history may take any possible form. The solution is very similar to the classical Theis (1935) equation but uses the Green's function for a pumped aquifer given
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Study on Permeability Calculation Method Based on J Function and Fractal Theory Groundwater (IF 2.6) Pub Date : 2023-07-01 Guangteng Lu, Fengpeng Lai, Bince Li
Permeability is a required parameter for studying aquifer properties. However, for sandstone aquifers with low permeability, it is difficult to measure permeability directly through experiments. Based on fractal theory and the J function, a new method to calculate the permeability of a sandstone aquifer is derived. This work first solves the J function under each water saturation according to its definition
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Community Cloud Computing Infrastructure to Support Equitable Water Research and Education. Groundwater (IF 2.6) Pub Date : 2023-07-03 Anthony M Castronova,Ayman Nassar,Wouter Knoben,Michael N Fienen,Louise Arnal,Martyn Clark
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Estimating Groundwater Pumping for Irrigation: A Method Comparison Groundwater (IF 2.6) Pub Date : 2023-06-22 Andrea E. Brookfield, Samuel Zipper, Anthony D. Kendall, Hoori Ajami, Jillian M. Deines
Effective groundwater management is critical to future environmental, ecological, and social sustainability and requires accurate estimates of groundwater withdrawals. Unfortunately, these estimates are not readily available in most areas due to physical, regulatory, and social challenges. Here, we compare four different approaches for estimating groundwater withdrawals for agricultural irrigation
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Milestones of Groundwater Management in China. Groundwater (IF 2.6) Pub Date : 2023-07-03 Yaqiang Wei
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A Unit-Concentration Method to Quantify Source Contribution Groundwater (IF 2.6) Pub Date : 2023-06-15 Vivek Bedekar, Christopher Neville, Matthew J. Tonkin, R. Douglas Bartlett, Paul Plato
Solute migration is typically simulated to describe and estimate the fate and transport of contaminants in groundwater. The unit-concentration approach is investigated here as a method to enable solute transport simulations to expand the capabilities of groundwater flow modeling. The unit-concentration method uses a concentration value of one to identify sources of water to be assessed and a concentration
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Estimation of Aquifer Transmissivity From Analysis of Long-Term Monitoring With the Thiem Solution Groundwater (IF 2.6) Pub Date : 2023-06-08 Joel C. Henry, Christopher J. Neville, Alyssa N. Olson
The application of the Thiem equation to support the interpretation of comprehensive long-term monitoring datasets, made possible through modern datalogging technology, is presented as an alternative to constant-rate aquifer testing to obtain representative transmissivity estimates in settings where controlled hydraulic testing may be impractical. Water levels logged at regular intervals can be readily
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CFPy—A Python Package for Pre- and Postprocessing of the Conduit Flow Process of MODFLOW Groundwater (IF 2.6) Pub Date : 2023-06-05 Thomas Reimann, Max Gustav Rudolph, Leonard Grabow, Torsten Noffz
The conduit flow process (CFP) for MODFLOW's groundwater flow model is an advanced approach for investigating complex groundwater systems, such as karst, with coupled discrete-continuum models. CFP represents laminar and turbulent flow in a discrete pipe network coupled to a matrix continuum. However, the preprocessing demand is comparatively high to generate the conduit network and is usually performed
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Disagreeing to Agree: Multimodel Analyses to Develop Good Neighbor Agreements Groundwater (IF 2.6) Pub Date : 2023-06-05 David Morales, Abigail Kahler, Ty Ferre
Groundwater models compile existing relevant information into a mathematical description of a hydrogeologic system, making them invaluable resources for decision makers. Over time, these models have followed a trajectory of increased complexity, which has required improvements in model calibration and parameter estimation. These advances have allowed increased appreciation for quantifying model predictive
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Evaluation of Dual Domain Mass Transfer in Porous Media at the Pore Scale Groundwater (IF 2.6) Pub Date : 2023-05-31 Leland Dorchester, Frederick D. Day-Lewis, Kamini Singha
Dual-porosity models are often used to describe solute transport in heterogeneous media, but the parameters within these models (e.g., immobile porosity and mobile/immobile exchange rate coefficients) are difficult to identify experimentally or relate to measurable quantities. Here, we performed synthetic, pore-scale millifluidics simulations that coupled fluid flow, solute transport, and electrical
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Soil Water Movement and Groundwater Recharge Under Different Land Uses in a Flood-Irrigated Area Groundwater (IF 2.6) Pub Date : 2023-05-31 Lihu Yang, Xianfang Song, Yuxue Ma, Liang Gong, Zhipeng Zhao
The water shortage in agriculture area in China requires to reduce the consumption of excessive water in flood irrigation. Therefore, the dynamics of soil water regime is needed to investigate and water-saving irrigation is necessary to alleviate water shortage. This study investigated the impact of flood irrigation on soil water movement and recharge to groundwater in the Yellow River irrigation area
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FloPy Workflows for Creating Structured and Unstructured MODFLOW Models Groundwater (IF 2.6) Pub Date : 2023-05-29 Joseph D. Hughes, Christian D. Langevin, Scott R. Paulinski, Joshua D. Larsen, David Brakenhoff
FloPy is a Python package for creating, running, and post-processing MODFLOW-based groundwater flow and transport models. FloPy functionality has expanded to support the latest version of MODFLOW (MODFLOW 6) including support for unstructured grids. FloPy can simplify the process required to download MODFLOW-based and other executables for Linux, MacOS, and Windows operating systems. Expanded FloPy