Article
Environmental Sciences
Maria Natalia Marrochi, Lisa Hunt, Marina Solis, Ana Maria Scalise, Silvia Laura Fanelli, Carlos Bonetto, Hernan Mugni
Summary: This study assessed the effects of land use on the benthic invertebrate assemblages of streams in the main Argentine agricultural region. The results showed that streams surrounded by croplands had higher nutrient concentrations, pesticide levels, and different macroinvertebrate assemblages compared to streams surrounded by pasture or reserve.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Andreas Wurth, Melanie Mechler, Kathrin Menberg, Mehmet A. Ikipinar, Peter Martus, Reiner Soehlmann, Runa S. Boeddinghaus, Philipp Blum
Summary: The aim of this study was to investigate the applicability of phytoscreening for per- and polyfluoroalkyl substances (PFAS) contaminations at a contaminated site in Germany. Three plant species were sampled to evaluate seasonal and annual variations in PFAS concentrations. The results showed that different species had different PFAS concentrations, with the highest concentrations observed in white willow, followed by black poplar and black alder. The phytoscreening technique successfully detected and delineated the impact of PFAS on groundwater.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Ashley J. Rust, Scott Roberts, Mandy Eskelson, Jackie Randell, Terri S. Hogue
Summary: On the backdrop of a changing climate, wildfires in the western United States have been increasing in number, size, and severity, causing significant impacts on ecosystems. A recent fire in southwestern Colorado has resulted in elevated metal concentrations in water and altered insect communities, highlighting the post-fire mobilization of naturally occurring metals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Andrew B. Cundy, Lorraine LaFreniere, R. Paul Bardos, Eugene Yan, Robert Sedivy, Caroline Roe
Summary: The large-scale integrated phytomanagement system at Murdock, Nebraska has effectively mitigated CCl4 contamination over a 10+ year period, with Eastern Cottonwood playing an increasing role in removal. The system has not only achieved risk management but also brought wider social and environmental benefits through carbon sequestration and community engagement.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Geosciences, Multidisciplinary
Adam Mitton, Diana Allen
Summary: Periods of streamflow cessation and drying are increasing globally. The heterogeneity of habitat conditions is a key control on the variability of benthic macroinvertebrate (BMI) communities in streams with intermittent flow. Unlike other studies, BMI richness, diversity, and abundance were consistently higher at intermittent riffle sites than perennial riffle sites, which were similar in BMI community composition to pool sites.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Nikolas Benavides Hoglund, Charlotte Sparrenbom, Rui Hugman
Summary: Polluted groundwater discharge from a contaminated site in Hagfors, Sweden is affecting a nearby sparsely populated stream. To address the difficulties in remediating the source zone, decision makers have changed the site management objective to mitigating the discharge. A groundwater numerical decision-support model was developed to help formulate targeted remediation strategies. The model incorporates historical data and measurements of surface water chemistry to estimate the flux and distribution of contaminated groundwater discharge.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Environmental Sciences
J. L. Nickels, D. P. Genereux, D. R. U. Knappe
Summary: Quantifying VOC transport from groundwater to streams is challenging yet essential for understanding off-site migration of VOCs and potential impacts on ecosystems and human populations. A unique streambed point sampling approach was used to measure water and VOC fluxes from groundwater to an urban stream in North Carolina, USA. Results showed the discharge of two main VOC plumes on opposite sides of the stream, with benzene being the most abundant in one plume and cis-1,2-dichloroethene (cDCE) and vinyl chloride (VC) dominating the other.
JOURNAL OF CONTAMINANT HYDROLOGY
(2023)
Article
Environmental Sciences
Brian A. Wolff, Justin P. F. Pomeranz, Christopher J. Kotalik, Edward K. Hall, William H. Clements
Summary: This study assessed the effects of habitat restoration on aquatic and terrestrial prey resources in a system recovering from mining pollution in the Upper Arkansas River, Colorado. Although significant improvements were observed in water quality and benthic macroinvertebrate communities after restoration, there were minimal changes in the abundance of aquatic or terrestrial invertebrates. Brown trout populations responded positively to both water quality improvements and habitat restoration, suggesting differences in the effectiveness of remediation and restoration between macroinvertebrates and fish.
INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT
(2022)
Article
Ecology
Neal D. Mundahl, Erik D. Mundahl
Summary: The study revealed that agriculture-dominated karst areas had significant negative impacts on stream habitats and biota, with over half of the sites showing degradation. Wide riparian buffers and avoidance of groundwater influence have allowed for some recovery in certain stream reaches, but more buffers and soil conservation practices are needed to protect additional stream segments and biota. New stream buffer laws have resulted in establishment of vegetated buffers at all study sites, potentially leading to improved habitat and biotic communities in the future.
ECOLOGICAL PROCESSES
(2022)
Review
Ecology
Emma Land, Chelsea N. Peters
Summary: Groundwater discharge into streams has a significant impact on the biodiversity and health of groundwater-dependent stream ecosystems. These discharge areas can act as biodiversity hotspots, providing unique habitats for various species. However, identifying and sampling these areas is challenging. Nonetheless, they play a crucial role in fish spawning, benthic macroinvertebrate biodiversity, microbial communities, and aquatic and riparian vegetation. Therefore, increasing research on biodiversity indicators of groundwater upwelling zones and involving the public in citizen science practices to study the relationships between groundwater and dependent stream ecosystems is important.
JOURNAL OF FRESHWATER ECOLOGY
(2023)
Article
Environmental Sciences
Maitane Erdozain, Karen A. Kidd, Erik J. S. Emilson, Scott S. Capell, Taylor Luu, David P. Kreutzweiser, Michelle A. Gray
Summary: The study suggests that the biological impacts of forest harvesting on water sources may accumulate or dissipate downstream, depending on sediment and nutrient dynamics. Intensive and extensive forestry management may lead to decreased macroinvertebrate diversity, but overall, there were no other signs of biological impairment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Yilin Tian, Yuwei Liu, Yingzhi Gao, Dong Cui, Wei Zhang, Ziwei Jiao, Fulong Yao, Zhenxing Zhang, Haijun Yang
Summary: This study investigated the effects of the freezing-thawing process on benthic macroinvertebrate communities in different habitats of a glacier-fed stream in Xinjiang, China. The results showed that the freezing-thawing process resulted in a decline in species richness and diversity of benthic macroinvertebrates, with higher richness and diversity in riffles compared to pools.
Article
Engineering, Environmental
Reza Mahinroosta, Lalantha Senevirathna, Miao Li, Karthika KrishnaPillai
Summary: A numerical model was developed to predict the migration of PFOS in a contaminated site over 100 years, showing that PFOS remains under a concrete slab for a long time with decay being the dominant factor. It takes several decades for PFOS to contaminate groundwater, reaching the threshold value for drinking water in 25 years and extending horizontally to an area up to five times the size of the contaminated site.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Jih-Hsing Chang, Cheng-Di Dong, Mohanraj Kumar, Shan-Yi Shen
Summary: A novel integrated remediation system combining cosolvent, electrokinetics, and pumping techniques demonstrated its practical feasibility to clean up chlorinated-contaminated groundwater, effectively removing tetrachloroethylene (PCE).
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Cameron W. M. Murphy, Greg B. Davis, John L. Rayner, Tom Walsh, Trevor P. Bastow, Adrian P. Butler, Geoffrey J. Puzon, Matthew J. Morgan
Summary: This study investigated the distribution of potential chemotactic and hydrocarbon degrading microbes across the water table of a legacy petroleum hydrocarbon site near Perth, Western Australia. The results showed that naphthalene contamination significantly increased the occurrence of potential CD microbes, potentially enhancing natural source zone depletion. Further exploration and definition of this link are crucial for accurately estimating the biodegradation of petroleum hydrocarbon fuels.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Water Resources
Louise Rosenberg, Mette M. Broholm, Nina Tuxen, Ida Henriette Kerrn-Jespersen, Gro Lilbaek, Poul L. Bjerg
Summary: This study focuses on using MiHPT tool to investigate the vertical hydraulic gradient at a contaminated site in Denmark. The data obtained using MiHPT compared well with observations from nearby wells. MiHPT provides quick access to information regarding subsurface permeability and contaminant distribution, but additional dissipation tests during HPT logging increased the cost by 3% compared to standard HPT logs.
GROUND WATER MONITORING AND REMEDIATION
(2022)
Editorial Material
Water Resources
Karsten Arnbjerg-Nielsen, Animesh K. Gain, Marko Keskinen, Olli Varis, Ursula S. McKnight
Summary: The paper congratulates Heal et al. for bringing up an important discussion on expanding the scope of the water-energy-food nexus. It acknowledges the significance of including water quality in the nexus, while also noting the challenges and costs associated with improving water quality. It suggests considering more localized contexts rather than a global framing for analysis of the nexus.
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES
(2022)
Article
Environmental Sciences
Mehran Naseri-Rad, Ronny Berndtsson, Amir Aminifar, Ursula S. McKnight, David O'Connor, Kenneth M. Persson
Summary: This article introduces a decision support system, DynSus, for integrating contaminant fate and transport models with a sustainability assessment tool. It helps to select sustainable solutions for cleaning up contaminated sites. Simulation analysis shows that active remediation practices are more sustainable over the entire project lifecycle.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Studies
Suxia Liu, Majken Deichmann, Mariu A. Moro, Lars S. Andersen, Fulin Li, Tommy Dalgaard, Ursula S. McKnight
Summary: The paper discusses a comparative study of greenhouse agriculture policies globally, addressing key issues in policy responses and potential solutions, emphasizing the need for a more holistic and multi-objective policy approach.
Article
Biodiversity Conservation
Gregory G. Lemaire, Jes Jessen Rasmussen, Sebastian Hoess, Sebastian Figari Kramer, Anna-Ricarda Schittich, Yujian Zhou, Christian J. Koppl, Walter Traunspurger, Poul L. Bjerg, Ursula S. McKnight
Summary: Climate change, agricultural production, and urbanization are major factors driving the decline in freshwater biodiversity; understanding the physicochemical and biogeochemical processes and their relation to ecological quality is essential.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
L. Levy, R. Thalund-Hansen, T. Bording, G. Fiandaca, A. Christiansen, K. Rugge, N. Tuxen, M. Hag, P. L. Bjerg
Summary: This study presents a monitoring tool for imaging the spreading of ZVI and its associated ionic cloud, using cross-borehole time-lapse ERT. The tool provides a spatially complete and rapid image of the remediation cloud distribution. Additionally, the study investigates the benefit of hydraulic conductivity mapping to understand unexpected injection paths.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Louise Rosenberg, Klaus Mosthaf, Mette M. Broholm, Annika S. Fjordboge, Nina Tuxen, Ida Henriette Kerrn-Jespersen, Vinni Ronde, Poul L. Bjerg
Summary: Interest in using contaminant mass discharge (CMD) for risk assessment of contaminated sites has increased. The ProfileFlux method has been developed to estimate CMD at contaminated sites, allowing for prioritization of further investigation and remedial actions. It combines high-resolution concentration profiles and a flow and transport model.
JOURNAL OF CONTAMINANT HYDROLOGY
(2023)
Article
Water Resources
Bolette B. B. Jensen, Louise Rosenberg, Aikaterini Tsitonaki, Nina Tuxen, Poul L. L. Bjerg, Lars Nielsen, Thomas M. M. Hansen, Majken C. C. Looms
Summary: Heterogeneous glacial deposits play a dominant role in many areas of the Northern Hemisphere. Crosshole ground penetrating radar (GPR) is proposed as a valuable tool for studying contaminant transport in these landscapes. In this study, GPR data collected at an industrial contaminated site in a clay till setting were processed using a novel inversion approach. The results were compared to borehole logs, grain size analyses, and permeability data to evaluate the effectiveness of GPR in characterizing geological variability. The findings suggest that GPR has the potential to provide high-resolution geological information and fill the data gap between boreholes in contaminated site investigations.
GROUND WATER MONITORING AND REMEDIATION
(2023)
Article
Water Resources
Christian J. Koppl, Ursula S. McKnight, Gregory G. Lemaire, Agnete M. Norregaard, Thea C. Thiim, Poul L. Bjerg, Peter Bauer-Gottwein, Monica Garcia
Summary: This study evaluated the performance of a hyperspectral imaging system and a consumer grade camera in mapping the concentration of a fluorescent tracer in a contaminated stream. The results showed that the hyperspectral system performed better than the RGB camera in mapping the concentration in all sections of the stream, regardless of illumination changes.
ADVANCES IN WATER RESOURCES
(2023)
Article
Environmental Sciences
Rasmus Thalund-Hansen, Mads Troldborg, Lea Levy, Anders Vest Christiansen, Thue. S. S. Bording, Poul. L. L. Bjerg
Summary: A new methodology was developed to support CMD-based risk assessment of groundwater contamination. The geoelectrical cross-borehole induced polarization (IP) data were used to estimate hydraulic conductivity (K) distributions, and the results were consistent with traditional methods. The high IP resolution improved the accuracy of CMD predictions and the evaluation of remediation performance.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Shane A. Carnohan, Xenia Trier, Suxia Liu, Lauge P. W. Clausen, Jai K. Clifford-Holmes, Steffen F. Hansen, Lorenzo Benini, Ursula S. McKnight
Summary: As societies and natural systems become more interconnected, sustainable management needs to adapt to new knowledge from both ecological and social domains and act on it effectively. The Anthropocene and approaching the limit for humanity's safe operating space highlight the need for better information feedbacks between science, policy, and society. The Drivers-Pressures-State-Impacts-Response (DPSIR) framework can support sustainable policy development and implementation, but its focus on analytical and procedural aspects should be made explicit for more effective coordination across silos and studies.
CURRENT RESEARCH IN ENVIRONMENTAL SUSTAINABILITY
(2023)
Article
Environmental Sciences
M. Frederiksen, K. Mosthaf, A. B. Bolingtoft, C. N. Albers, B. S. B. Christensen, M. Christophersen, N. Tuxen, P. Tuchsen, L. Clausen, G. A. S. Janniche, P. L. Bjerg
Summary: This study investigated methods for predicting the duration and impact of persistent and mobile organic compounds (PMOCs) on groundwater quality at a drinking water well field affected by multiple contaminant sources. The study used the fungicide metabolite N,N-dimethylsulfamide (DMS) as an example, and made important discoveries by combining contaminant mass discharge (CMD) estimations, modeling, and groundwater dating. The study found that the current center of contaminant mass was near the source area, and predicted that CMD at the well field would peak in 2040 with an impact on groundwater quality expected until the end of the 21st century. The study also identified an additional pesticide source that had not yet been thoroughly investigated.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Analytical
Anna-Ricarda Schittich, Ursula S. McKnight, Colin Stedmon, Barth F. Smets
Summary: Natural dissolved organic matter (DOM) can influence the biodegradation of organic micropollutants (OMP) in aquatic systems. This study found that a specific OMP degrader strain had high substrate specificity but was also able to compete with other common strains for biodegradation. These results can inform the development of modeling frameworks investigating the influence of DOM on OMP biodegradation.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)