Article
Multidisciplinary Sciences
Taylor Maavara, Erica R. Siirila-Woodburn, Fadji Maina, Reed M. Maxwell, James E. Sample, K. Dana Chadwick, Rosemary Carroll, Michelle E. Newcomer, Wenming Dong, Kenneth H. Williams, Carl Steefel, Nicholas J. Bouskill
Summary: There is a growing understanding of the role of bedrock weathering as a nitrogen source in various environmental systems, especially in mountainous regions. However, the relative contributions of rock-derived nitrogen to nitrogen supply in mountainous watersheds are not well understood. The study developed a suite of models to quantify the sources, transformations, and sinks of geogenic and atmospheric nitrogen in a mountain watershed.
Article
Environmental Sciences
Michael N. Gooseff, Ruby N. Ghosh, Erin Cantrell, M. Evan Matusz, Charles McIntire, Vivek Philip
Summary: This study explores the long-term dynamics of dissolved oxygen (DO) in hyporheic zones and highlights the influence of hydrologic exchange and biogeochemical reactions on DO levels. Through continuous monitoring of temperature and DO at different depths, it is found that DO in the hyporheic zone exhibits regular daily fluctuations, but does not align with temperature patterns. Results suggest that antecedent snowpack conditions and microbial communities play a significant role in regulating hyporheic DO.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Environmental
B. Faybishenko, B. Arora, D. Dwivedi, E. Brodie
Summary: In this study, a statistical framework and multiple analysis methods were applied to evaluate long-term temporal and spatial climatic change in mountainous regions. The results showed that dynamic climatic processes drive the changes in watershed climatic zonation, highlighting the need for periodic re-evaluation.
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
(2023)
Article
Environmental Sciences
Kewei Chen, Xingyuan Chen, Xuehang Song, Martin A. Briggs, Peishi Jiang, Pin Shuai, Glenn Hammond, Hongbin Zhan, John M. Zachara
Summary: Quantifying dynamic hydrologic exchange flows (HEFs) within river corridors that experience high-frequency flow variations caused by dam regulations is important for understanding the biogeochemical processes at the river water and groundwater interfaces. In this study, a data assimilation-based approach was developed to estimate the sub-daily flux under highly dynamic flow conditions using multi-depth temperature observations. The results showed that this method can accurately capture vertical sub-daily fluxes even in the presence of multidimensional flow. The approach was successfully applied to real field temperature data collected at the Hanford site.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Civil
Fadji Z. Maina, Erica R. Siirila-Woodburn, Peter-James Dennedy-Frank
Summary: Accurate quantification of water resource evolution requires a better understanding of the movement of water and energy. The uncertainty of hydrodynamic parameters has a significant impact on ET, especially in areas with a disconnection between groundwater and land surface processes.
JOURNAL OF HYDROLOGY
(2022)
Article
Water Resources
Rosemary W. H. Carroll, Jeffery Deems, Reed Maxwell, Matthias Sprenger, Wendy Brown, Alexander Newman, Curtis Beutler, Markus Bill, Susan S. Hubbard, Kenneth H. Williams
Summary: Isotopic information from 81 snowpits in a large Colorado watershed was analyzed to understand the variability of snowpack and snowmelt. The study found that snowfall isotopic inputs and aspect were the primary factors affecting snowpack variability, while sublimation increased at lower elevations and during periods of high temperature and solar radiation. Additionally, post-depositional fractionation and isotopic homogenization were observed in the snowpack, with snowmelt becoming isotopically enriched over time.
HYDROLOGICAL PROCESSES
(2022)
Article
Water Resources
Zarine Kakalia, Charuleka Varadharajan, Erek Alper, Eoin L. Brodie, Madison Burrus, Rosemary W. H. Carroll, Danielle S. Christianson, Wenming Dong, Valerie C. Hendrix, Matthew Henderson, Susan S. Hubbard, Douglas Johnson, Roelof Versteeg, Kenneth H. Williams, Deborah A. Agarwal
Summary: The U.S. Department of Energy's Colorado East River Community Observatory (ER) provides researchers with a unique opportunity to study hydrobiogeochemical responses to hydrological perturbations in headwater systems. Through the Watershed Function Scientific Focus Area (SFA), researchers from over 30 organizations have conducted cross-disciplinary process-based investigations and modeling, generating valuable data on factors influencing snow accumulation, water balance partitioning, and riverine geochemical exports. The ER's open data policy and publicly available datasets contribute to a broader understanding of multidisciplinary multiscale measurements in representative catchment observatories.
HYDROLOGICAL PROCESSES
(2021)
Article
Geography, Physical
Yalong Li, Xiangtong Huang, Ergang Lian, Chao Li, Juan Xu, Ping Yin, Zhen Song, Shouye Yang
Summary: The sediment source-to-sink processes of river systems have significant impacts on depositional environments and long-term climate change. This study compares the geochemical and provenance heterogeneity of two mountainous rivers in subtropical East Asia and finds significant intra-catchment heterogeneity. The heterogeneity is mainly controlled by sediment mixing and tidal influence.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Agronomy
Vivek Venishetty, Prem B. Parajuli
Summary: This study analyzes the impact of different management practices on water quality using the Soil and Water Assessment Tool. The results show that the implementation of Vegetative Filter Strips (VFS) and Riparian Buffer can reduce sediment, Total Nitrogen (TN), and Total Phosphorus (TP) yields. Additionally, the use of Cover Crops (CC) such as Rye grass and Winter Wheat (WW) can also contribute to the reduction of streamflow and nutrient yields. These findings provide valuable insights for the agricultural community in improving water quality.
Article
Geosciences, Multidisciplinary
Junwen Zhang, Yani Yan, Zhiqi Zhao, Congqiang Liu
Summary: This study analyzed the concentration and isotopic composition of lithium in river waters from the Niyang River, southern Tibetan Plateau. The results show that high isotopic values mainly come from geothermal water and silicate weathering. The study suggests that geothermal water input may mask the lithium isotope signal of silicate weathering in river water, affecting the accurate understanding of the relationship between lithium isotopic composition and weathering intensity in the river basin.
SCIENCE CHINA-EARTH SCIENCES
(2023)
Article
Environmental Sciences
Marcos D. Robles, John C. Hammond, Stephanie K. Kampf, Joel A. Biederman, Eleonora M. C. Demaria
Summary: Recent research in the Upper Colorado River Basin suggests that despite warming temperatures and reduced snowfall, consistent streamflow declines have not been observed due to increased winter runoff. A study on nine gaged basins of the Salt River and its tributaries found that annual and seasonal streamflow patterns remained stable despite significant temperature increases from 1968-2011, with winter inputs playing a crucial role in streamflow production. Atmospheric rivers were identified as a key contributor to large winter streamflow peaks.
Article
Multidisciplinary Sciences
Xiu Yuan, Tongxu Liu, Patricia Fox, Amrita Bhattacharyya, Dipankar Dwivedi, Kenneth H. Williams, James A. Davis, T. David Waite, Peter S. Nico
Summary: Researchers conducted field measurements of H2O2 concentrations in an intra-meander hyporheic zone and in surface water in East River, CO. The study found a widespread presence of H2O2 in groundwater and surface water, closely correlated to local redox gradients. This suggests a sustained balance between H2O2 production and consumption in the hyporheic zone, with potential implications for various biogeochemical processes.
SCIENTIFIC REPORTS
(2022)
Article
Geochemistry & Geophysics
Benjamin H. Prince, Franco Marcantonio, Peter S. K. Knappett
Summary: This study found that the lithology in the Brazos River watershed has a significant impact on uranium isotope systematics. Rainwater has a negligible effect on U-234/U-238 activity ratios in water sources. The water in the Brazos River is mainly sourced from Lake Whitney, groundwater, and small tributaries.
APPLIED GEOCHEMISTRY
(2022)
Article
Environmental Sciences
Pamela L. Nagler, Armando Barreto-Munoz, Ibrahima Sall, Matthew R. Lurtz, Kamel Didan
Summary: This study aims to estimate the actual evapotranspiration and annual consumptive use of riparian vegetation in select areas of the Little Colorado River watershed in northeastern Arizona, USA. Remote sensing methods were used to estimate vegetation evapotranspiration and calculate the annual consumptive use for this region. The findings provide insights into the water use of riparian vegetation in this area.
Article
Water Resources
Linlin Wang, Xiaoyu Lei, Yang Zhou, Xian-zhong Mao, Jing-Cheng Han, Bing Li, Yuefei Huang, Runqi Zhao, Hongsheng Bi, Zhaozhao Tang, Yongqiang Wang, Hailong Li
Summary: This study investigates the hydrological and biogeochemical processes in Shenzhen Bay, revealing changes in DIN components over the past 31 years. The study finds a significant increase in NO3- concentration in the upper bay, which is attributed to reduced runoff NH4+ inputs, tidal currents, and biogeochemical actions.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Article
Water Resources
D. Knabe, D. Dwivedi, H. Wang, C. Griebler, I. Engelhardt
Summary: While induced bank filtration is an effective method for sustainable drinking water production, it is susceptible to surface water contaminations. This study monitored the concentrations of adenoviruses and pathogen indicators over 16 months at an active bank filtration plant in Germany to analyze the effect of seasonal changes on pathogen transport. A groundwater model was created to simulate various factors, and the results showed that travel time and travel distance were key factors for the removal of coliforms, coliphages, and adenoviruses.
ADVANCES IN WATER RESOURCES
(2023)
Article
Geochemistry & Geophysics
Lucien Stolze, Bhavna Arora, Dipankar Dwivedi, Carl Steefel, Zhi Li, Sergio Carrero, Benjamin Gilbert, Peter Nico, Markus Bill
Summary: The weathering of shale plays a crucial role in the hydrochemical fluxes to river systems and has a significant impact on global biogeochemical cycles. However, there is still a lack of quantitative understanding regarding shale weathering and its influence on these cycles due to the complex interactions between hydrological, biogeochemical, and physical processes. In this study, a novel modeling approach was developed to quantitatively interpret the long-term chemical weathering of shale and its effect on geochemical conditions. The model considers multiple processes involved in shale weathering, including infiltration of meteoric water, mineral-water interactions, microbial oxidation of organic matter, mineral reactions-induced evolution of porosity, and gas exchange between the subsurface and atmosphere.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Sergio Carrero, Sarah P. Slotznick, Sirine C. Fakra, M. Cole Sitar, Sharon E. Bone, Jeffrey L. Mauk, Andrew H. Manning, Nicholas L. Swanson-Hysell, Kenneth H. Williams, Jillian F. Banfield, Benjamin Gilbert
Summary: The oxidative weathering of sulfidic rock has significant impacts on watersheds through the release of acidity and metals. By utilizing a combination of mineralogical and geochemical techniques, researchers were able to develop a weathering model that accurately predicts the pathways and controls of mineral transformation. This study provides valuable insights into the weathering processes of sulfidic sedimentary rocks and their implications for water quality.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Environmental Sciences
Nicholas E. E. Thiros, Erica R. R. Siirila-Woodburn, P. James Dennedy-Frank, Kenneth H. H. Williams, W. Payton Gardner
Summary: This study investigates the groundwater residence times in a mountain catchment in the East River Watershed, Colorado, USA. The results show that the groundwater in the upslope well has a residence time of hundreds of years, while the groundwater in the toe-slope well has a residence time of thousands of years. This highlights the importance of recharge dynamics and flow path mixing in the groundwater system.
WATER RESOURCES RESEARCH
(2023)
Review
Engineering, Civil
Bhavna Arora, Sylvain Kuppel, Christopher Wellen, Claire Oswald, Jannis Groh, Dahedrey Payandi-Rolland, James Stegen, Sarah Coffinet
Summary: The critical zone (CZ) is a complex system that combines natural and human elements, and understanding it requires cross-site cross-network collaborations. This review highlights the limitations of individual CZ observatories and advocates for a collaborative approach to studying the CZ. Various existing initiatives, tools, and techniques are discussed, along with the challenges and possible solutions for data harmonization and integration of social sciences.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Allen G. Hunt, Muhammad Sahimi, Boris A. Faybishenko, Markus Egli, Behzad Ghanbarian, Fang Yu
Summary: Understanding the relationship between carbon cycle and water demand is crucial for global climate change and predicting water resources. Our theoretical description based on percolation theory proposes that the fractal dimensionality of root systems affects evapotranspiration and carbon drawdown. We test our predictions using data from sclerophyll forests and find good agreement, with local PET variability playing a role in reducing data scatter.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Benjamin Gilbert, Sergio Carrero, Wenming Dong, Claresta Joe-Wong, Bhavna Arora, Patricia Fox, Peter Nico, Kenneth H. Williams
Summary: Daily measurements of river concentration of thorium (Th) provide novel insights into bedrock fracture processes. River Th concentrations show distinct patterns, uncorrelated with precipitation or atmospheric deposition. There is a weak statistical correlation between Th and seismic motion caused by distant earthquakes.
NATURE COMMUNICATIONS
(2023)
Editorial Material
Geochemistry & Geophysics
Peter B. Kelemen, Jurg M. Matter, Damon A. H. Teagle, Jude A. Coggon, Marguerite Godard, Katsuyoshi Michibayashi, Eiichi Takazawa, Alexis S. Templeton, Ken Williams, Zaher Al Sulaimani
Summary: This article provides a preface, which includes background information, a scientific overview, and an annotated bibliography of 63 papers published in the Journal of Geophysical Research (JGR) Special Issue on Ophiolites and Oceanic Lithosphere, with a focus on the Samail Ophiolite. The topics covered in the special issue include the formation and alteration of igneous ocean crust, subduction zone mass transfer, emplacement and evolution of ophiolites, processes of alteration and weathering of tectonically exhumed mantle peridotite, and the subsurface biosphere in the peridotite weathering environment. The bibliography is provided as a supplementary Excel spreadsheet with links to each paper, organized by topic but sortable by various factors.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Environmental Sciences
Touyee Thao, Bhavna Arora, Teamrat A. A. Ghezzehei
Summary: The application of biochar in agricultural systems has been widely studied. This study assesses the long-term effects of biochar application on soil water and plant interactions in tomato and pasture cropping systems. The results show that biochar application can increase soil water availability and improve water use efficiency. However, the effects on irrigation systems differ from rainfed systems.
VADOSE ZONE JOURNAL
(2023)
Article
Environmental Sciences
Keira Johnson, Adrian Harpold, Rosemary W. H. Carroll, Holly Barnard, Mark S. Raleigh, Catalina Segura, Li Li, Kenneth H. Williams, Wenming Dong, Pamela L. Sullivan
Summary: Summer streamflow predictions are crucial for water resource management, but shifts from snow to rain regimes and reductions in snowpack affect low-flow predictive models. Understanding the variability of groundwater contributions is important for predicting summer low flows. This study quantifies the groundwater contribution during the recession limb to predict summer low flows in three western US watersheds. The results show that recession limb groundwater is a strong predictor of low flows across all sites and significantly improves prediction compared to snow metrics at rain-dominated sites. The study suggests that the control of recession limb groundwater on summer low flows may be mediated by subsurface storage, with the proportion of dynamic storage being a key factor. Including recession limb groundwater improves low-flow prediction in diverse watersheds.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Michelle E. Newcomer, Jennifer Underwood, Sheila F. Murphy, Craig Ulrich, Todd Schram, Stephen R. Maples, Jasquelin Pena, Erica R. Siirila-Woodburn, Marcus Trotta, Jay Jasperse, Donald Seymour, Susan S. Hubbard
Summary: This study investigates the impact of wildfires on hydrological changes in the Russian River Watershed in California and finds that the influence of wildfires ceases to increase beyond a certain threshold of burned area. Drought and climate conditions have a greater impact on streamflow variability compared to wildfires. This suggests that wildfire adaptation and drought factors in Mediterranean ecoregions buffer the hydrological response to fires.
WATER RESOURCES RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Cam G. G. Anderson, Genevieve M. M. Goebel, Malak M. M. Tfaily, Patricia M. M. Fox, Peter S. S. Nico, Scott Fendorf, Marco Keiluweit
Summary: Floodplains are crucial for the cycling of organic carbon and regulation of ecosystem carbon storage. This study reveals the significance of mineral-organic associations in protecting and storing organic carbon in floodplain sediments.
ACS EARTH AND SPACE CHEMISTRY
(2023)