Article
Water Resources
Brian D. Smerdon, W. Payton Gardner
Summary: Synoptic sampling of three rivers is an efficient way to understand groundwater flow paths in a previously unstudied large area. Modelling groundwater discharge and mean age helps generate knowledge of groundwater circulation for a large area, which is useful for conceptual model development and future research.
HYDROLOGICAL PROCESSES
(2022)
Article
Water Resources
Brian D. Smerdon, W. Payton Gardner
Summary: Synoptic sampling of three rivers is an efficient way to gain understanding of groundwater flow paths, providing knowledge for developing conceptual models and future characterization efforts. Results suggest that benchland areas favored deeper groundwater circulation, while lower relief areas had shorter and shallower groundwater circulation.
HYDROLOGICAL PROCESSES
(2022)
Article
Environmental Sciences
T. Waite, K. J. Jankowski, D. A. Bruesewitz, M. Van Appledorn, M. Johnston, J. N. Houser, D. A. Baumann, B. Bennie
Summary: Shifts in the frequency and intensity of high discharge events due to climate change may have important consequences for the hydrology and biogeochemistry of rivers. Our study analyzed high-frequency sensor data collected from the Upper Mississippi River to understand the event-scale biogeochemical dynamics. We found distinct event responses across different habitats and biogeochemical components, with contrasting patterns for physical-chemical and biological constituents. This highlights the importance of considering the diverse characteristics of large rivers and their potential implications for local and downstream ecosystems as the climate continues to change.
WATER RESOURCES RESEARCH
(2023)
Article
Water Resources
Fu Liao, M. Bayani Cardenas, Xiaobing Chen, Guangcai Wang
Summary: Groundwater discharge flux into rivers is important for the conservation and management of aquatic ecosystems and resources. This study used Rn-222 as a tracer to estimate groundwater discharge into the Lower Colorado River in Austin, Texas, USA. The results showed that Rn-222 in river water and groundwater changed synchronously over a flood cycle, and the estimated groundwater discharge ranged from negative values to 1570 m³/h. The study also emphasized the importance of monitoring Rn-222 in near-stream groundwater to accurately characterize dynamic groundwater discharge.
HYDROLOGICAL PROCESSES
(2023)
Article
Engineering, Environmental
Xiaoliang Sun, Yao Du, Yamin Deng, Hongchen Fan, Yanqiu Tao, Teng Ma
Summary: Lacustrine groundwater discharge plays a crucial role in the water and contaminant mass balance of Dongting Lake, with nutrients and heavy metals being significant components. Despite the relatively small discharge rate, contaminant input from groundwater discharge poses a potential threat to the ecological stability of the lake.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2021)
Article
Engineering, Civil
Marty D. Frisbee, Marc W. Caffee, James J. Camberato, Greg Michalski
Summary: Subsurface drainage modifications are commonly used in agricultural watersheds, but their impact on baseflow generation processes and salinity sources is not well understood. This study used geochemical and multiple isotope methods to investigate the sources of baseflow and salinity in the headwaters reach of the Wabash River. The results suggest that some solutes have a geologic source, while salinity may result from both anthropogenic and geologic factors.
JOURNAL OF HYDROLOGY
(2022)
Article
Geosciences, Multidisciplinary
M. Chmielarski, S. Dogramaci, P. G. Cook, J. L. McCallum
Summary: This study tests the limitations of using radioactive isotopes to track groundwater recharge behavior in confined aquifers and under transient conditions and finds that appropriate isotope selection is key to establishing past recharge regardless of aquifer lithology or geometry.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Civil
Peter G. Cook, Eddie W. Banks, Sarah K. Marshall, Glenn A. Harrington, Jordi Batlle-Aguilar, Shawan Dogramaci, Chris Turnadge
Summary: Faults can act as barriers or conduits to groundwater flow. Groundwater age inferred from hydrochemical data is a useful tool to estimate both barrier and conduit behavior. This study presents field measurements across three fault systems and discusses conceptual models of hydraulic head and groundwater age. The results show the importance of high data density to characterize fault zones.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Environmental
Sabina Rakhimbekova, Denis M. O'Carroll, Clare E. Robinson
Summary: This study evaluates the prevalence of pollutant sediment traps in nearshore aquifers adjacent to large lakes and focuses on the enrichment, transport, and release of arsenic. Field data from six sites along the Laurentian Great Lakes indicate widespread enrichment of arsenic in oxic nearshore aquifers, while arsenic is more mobile in reducing aquifers.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
G. Trommetter, D. Dumoulin, D. H. Dang, V. Alaimo, G. Billon
Summary: Increase of water quality has become a popular topic, and it is important to identify the sources of pollution. This study analyzed inorganic compounds along a stream to assess the impact of wastewater treatment plants (WWTPs) and the effectiveness of tracers. The results showed that WWTPs strongly influenced water composition, especially within the first 6 km. However, some classical indicators had limitations, and using a set of relevant tracers, including alkali metals, could be a solution.
Article
Environmental Sciences
Shaoda Liu, Dunxian She, Chao Gao, Giuseppe Amatulli, Luqing Wang, Xixi Lu, Peter A. Raymond, Xinghui Xia
Summary: Groundwater discharge to river networks is a major source of riverine CO2 emission. Through water and CO2 mass balances, it was found that mountain reaches preferentially receive groundwater discharge while alluvial reaches lose water to aquifers. However, the magnitude of groundwater CO2 inputs is small, unable to account for the discrepancy between surface evasion and internal metabolism in the river.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
B. Camenen, N. Gratiot, J-A Cohard, F. Gard, V. Q. Tran, A-T Nguyen, G. Dramais, T. van Emmerik, J. Nemery
Summary: The hydrological dynamics of the Saigon River is influenced by a variety of factors, with this study proposing a low-cost method for estimating river discharge. Seasonal behaviors were observed in both water level and water discharge, with rainfall having little impact on them. Evidence of interactions between precipitation and coastal waters was found.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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
Kewei Chen, Maosheng Yin, Zhilin Guo, Xiuyu Liang, Xiaoou Wei, Shuai Yang, Xuchen Zhai, Chunmiao Zheng
Summary: Heat is a natural tracer used to estimate groundwater velocity and fluxes. This study develops a closed-form analytical solution for lateral heat transport in unconfined aquifers and applies two parameter estimation techniques to estimate groundwater velocity. The method provides a novel alternative to traditional environmental tracers.
JOURNAL OF HYDROLOGY
(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)
Editorial Material
Geochemistry & Geophysics
M. J. Hendry, D. K. Solomon, M. Person, L. I. Wassenaar, W. P. Gardner, I. D. Clark, K. U. Mayer, T. Kunimaru, K. Nakata, T. Hasegawa
Article
Environmental Sciences
M. Hokr, H. Shao, W. P. Gardner, A. Balvin, H. Kunz, Y. Wang, M. Vencl
ENVIRONMENTAL EARTH SCIENCES
(2016)
Article
Environmental Sciences
W. Payton Gardner, Milan Hokr, Hua Shao, Ales Balvin, Herbert Kunz, Yifeng Wang
ENVIRONMENTAL EARTH SCIENCES
(2016)
Article
Geochemistry & Geophysics
Stephen J. Bauer, W. Payton Gardner, Jason E. Heath
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2016)
Article
Geosciences, Multidisciplinary
Stephen J. Bauer, W. Payton Gardner, Hyunwoo Lee
GEOPHYSICAL RESEARCH LETTERS
(2016)
Article
Geochemistry & Geophysics
W. Payton Gardner, Stephen J. Bauer, Kristopher L. Kuhlman, Jason E. Heath
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2017)
Article
Engineering, Civil
Kimberly R. Beisner, W. Payton Gardner, Andrew G. Hunt
JOURNAL OF HYDROLOGY
(2018)
Article
Environmental Sciences
E. Knappe, R. Bendick, H. R. Martens, D. F. Argus, W. P. Gardner
WATER RESOURCES RESEARCH
(2019)
Article
Environmental Sciences
Zachary H. Hoylman, Kelsey G. Jencso, Jia Hu, Zachary A. Holden, Justin T. Martin, W. Payton Gardner
WATER RESOURCES RESEARCH
(2019)
Article
Geochemistry & Geophysics
Stephen Bauer, W. Payton Gardner, Hyunwoo Lee
Article
Agronomy
Patrick Wurster, Marco Maneta, Santiago Begueria, Kelly Cobourn, Bruce Maxwell, Nick Silverman, Stephanie Ewing, Kelsey Jensco, Payton Gardner, John Kimball, Zachary Holden, Xinde Ji, Sergio M. Vicente-Serrano
AGRICULTURAL AND FOREST METEOROLOGY
(2020)
Article
Geochemistry & Geophysics
W. Payton Gardner, David D. Susong
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2019)
Article
Water Resources
W. Payton Gardner, Kelsey Jensco, Zachary Hoylman, Robert Livesay, Marco Maneta
HYDROLOGICAL PROCESSES
(2020)
Article
Environmental Sciences
David L. Naftz, Katie Walton-Day, W. Payton Gardner, Michael C. Duniway, Donald Bills
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2020)
Article
Geosciences, Multidisciplinary
Brett Woelber, Marco P. Maneta, Joel Harper, Kelsey G. Jencso, W. Payton Gardner, Andrew C. Wilcox, Ignacio Lopez-Moreno
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2018)