Article
Environmental Sciences
Hridaya Bastola, Panayiotis Diplas
Summary: Regression models have identified discharge as a suitable variable for capturing channel geometry trends. However, using discharge alone does not reflect the fundamental dependence of channel geometry on watershed properties and precipitation characteristics.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Civil
Keivan Karimizadeh, Jaeeung Yi
Summary: This study investigated the effects of climate change on various factors in the Saghez watershed in Iran, using different models and scenarios. The results showed that future precipitation is projected to decrease, while minimum and maximum temperatures are expected to increase. Surface runoff is also expected to decrease in the future. The study identified the key factors influencing watershed runoff. These findings can be valuable for mitigating the impacts of climate change and developing long-term plans for watershed and water resource management.
WATER RESOURCES MANAGEMENT
(2023)
Article
Engineering, Civil
Yong Liu, Feifei Dong, Jie Niu
Summary: This study developed a new modeling framework called Process-guided Hybrid BBNs (PH-BBNs) to bridge the gap between Process-based Watershed Models (PWMs) and uncertainty-based BMP planning. The findings suggest that PH-BBNs can effectively capture the critical pathways of water, sediment, and Total Phosphorus (TP) loss, and highlight the vulnerability of watersheds to climate change. The implementation of parallel terraces and filter strips is recommended for reducing TP loads with high compliance confidence.
JOURNAL OF HYDROLOGY
(2022)
Article
Computer Science, Interdisciplinary Applications
Audrey Naulleau, Christian Gary, Laurent Prevot, Victor Berteloot, Jean-Christophe Fabre, David Crevoisier, Remi Gaudin, Laure Hossard
Summary: The diversity of pedoclimatic and socio-economic contexts in agricultural landscapes poses challenges for assessing the impacts of climate change. This study used models and a participatory approach to simulate and discuss the potential impacts on water balance, grape phenology, and yield in a Mediterranean vineyard watershed. Results showed a projected decrease in grape production by 7-14% by 2100, with a higher decrease in irrigated high-yield areas despite an increased water supply. Furthermore, a forecasted 6 degrees C increase in temperature during berry ripening could threaten wine quality. The approach of involving stakeholders in model development and result discussions provides a promising means of identifying local adaptations to climate change.
ENVIRONMENTAL MODELLING & SOFTWARE
(2022)
Article
Engineering, Civil
Baoxu Zhao, Huimin Lei, Dawen Yang, Shuyu Yang, Jerasorn Santisirisomboon
Summary: This study investigates the hydrological effects of deforestation in the Upper Chao Phraya River basin, a tropical monsoon region in Thailand. The findings suggest that deforestation contributes to increased annual streamflow, baseflow, and sediment load. The impact of deforestation varies depending on the specific sub-basin and the type of hydrological change. Climate change and forest cover reduction both play a role in affecting the hydrological and sedimentary changes observed in the region.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Environmental
Song S. Qian, Jonathan G. Kennen, Jason May, Mary C. Freeman, Thomas F. Cuffney
Summary: The study utilizes a continuous-variable Bayesian network model to predict the impact of future climate change and watershed development on stream ecosystem indicators, showing different ecological condition trajectories predicted by different climate models but similar worst-case scenarios. This established modeling approach combines mechanistic understanding with field data to predict management relevant variables across a heterogeneous landscape.
Article
Ecology
Youssef Brouziyne, Anna Maria De Girolamo, Aziz Aboubdillah, Lahcen Benaabidate, Lhoussaine Bouchaou, Abdelghani Chehbouni
Summary: The study reveals that under future climate change, flow regimes in the Bouregreg Watershed will undergo changes, mainly manifested in decreased and increased monthly flow magnitudes, increased frequency of flash pulses, and zero-flow days. The potential ecological implications were also analyzed, identifying the most sensitive streams in the watershed to guide local water planning and ecological preservation strategies.
ECOLOGICAL INFORMATICS
(2021)
Article
Multidisciplinary Sciences
Yujuan Wang, Peipei Wu, Yanxu Zhang
Summary: The impacts of climate change on mercury cycling in the ocean include increased elemental mercury evasion, decreased air-sea exchange rates, reduced availability of bioavailable mercury for methylation, and increased photodemethylation potential, which can affect the concentration of methylmercury in the marine food web.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Engineering, Civil
Vishnu Prasad Pandey, Dibesh Shrestha, Mina Adhikari
Summary: This study analyzed historical and projected trends in climatic and hydrological extremes in a watershed in Central-Southern Nepal, and their relationship. The results showed increasing trends in precipitation and temperature extremes in the historical period, with future hydrological extremes, particularly floods, expected to continue rising.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Haijun Peng, Yimeng Rong, Di Chen, Ruiyang Sun, Jie Huang, Hanwei Ding, Carolina Olid, Haiyu Yan
Summary: Mercury mining in southwest China may have started before the establishment of the Qin dynasty, around 2500 years ago, potentially motivated by climate changes and human industrial activities. Two major peaks of mercury deposition were observed in the past 10,000 years, coinciding with critical climate changes. This study highlights the significance of climate variability and local mercury mining in controlling global atmospheric mercury deposition during the Holocene.
Article
Water Resources
Xiaobo Zhai, Yongping Li, Hao Wang, Guohe Huang, Yanfeng Li
Summary: By analyzing the projected results under different climate scenarios, the study found that the annual average temperature in the Syr Darya watershed will increase in the coming decades, while annual precipitation will decrease. The streamflow will exhibit different trends in different seasons. The outcomes of this research can be utilized for supporting water resources planning and management.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Editorial Material
Environmental Sciences
Amy E. East, Gordon E. Grant
Summary: This article discusses the changing paradigm for dam and reservoir management in the western United States. New challenges have arisen for dam and reservoir management due to climate change, population increase, reservoir sedimentation, declining safety of aging dams, and more environmentally focused management objectives. Removing unsafe, obsolete, and uneconomical dams has become common practice.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Huanxin Zhang, Shiliang Wu, Eric M. Leibensperger
Summary: The study focuses on understanding the source-receptor relationships for mercury deposition in the context of global change using a global 3-D chemical transport model. It finds that under different emission scenarios, the relative contributions from anthropogenic emissions to total mercury deposition in different regions show significant changes, while impacts from changes in climate and land use/land cover are generally smaller in magnitudes but show stronger spatial variations.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Nani Heryani, Budi Kartiwa, Hendri Sosiawan, Popi Rejekiningrum, Setyono Hari Adi, Yayan Apriyana, Aris Pramudia, Muhammad Prama Yufdy, Chendy Tafakresnanto, Achmad Arivin Rivaie, Suratman Suratman, Ai Dariah, Afrizal Malik, Yusuf Yusuf, Cahyati Setiani
Summary: This study analyzed the impact of climate change on agricultural water availability in Cimanuk Watershed, Indonesia. The results indicated a decreasing trend in water availability from all generated climate data and scenarios. However, a specific scenario showed an increasing trend in the maximum discharge of Cimanuk river.
Article
Engineering, Civil
Jianzhu Li, Yunpeng Li, Ting Zhang, Ping Feng
Summary: Climate change has affected hydrological processes and redistributed water resources. This study used the SDSM model, BMA method, and QM method to downscale and correct climate data in the Yongding watershed. The results showed an upward trend in temperature, precipitation, and runoff under future climate scenarios, suggesting a potential alleviation of water shortage in the watershed. These findings are of great importance for decision-making in water resources management and protection.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Environmental
Samson G. Mengistu, Heather E. Golden, Charles R. Lane, Jay R. Christensen, Michael L. Wine, Ellen D'Amico, Amy Prues, Scott G. Leibowitz, Jana E. Compton, Marc H. Weber, Ryan A. Hill
Summary: Eutrophication, harmful algal blooms, and human health impacts are critical environmental challenges resulting from excess nitrogen and phosphorus in surface waters. We developed a set of wetland hydrological transport variables to explore how wetlands explain the variability in total nitrogen (TN) and total phosphorus (TP) concentrations across the Upper Mississippi River Basin (UMRB) in the United States. We found that wetland flowpath variables improved the regression models and provided insights into potential processes governing how wetlands influence watershed-scale TN and TP concentrations.
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2023)
Article
Ecology
Charles R. Lane, Irena F. Creed, Heather E. Golden, Scott G. Leibowitz, David M. Mushet, Mark C. Rains, Qiusheng Wu, Ellen D'Amico, Laurie C. Alexander, Genevieve A. Ali, Nandita B. Basu, Micah G. Bennett, Jay R. Christensen, Matthew J. Cohen, Tim P. Covino, Ben DeVries, Ryan A. Hill, Kelsey Jencso, Megan W. Lang, Daniel L. McLaughlin, Donald O. Rosenberry, Jennifer Rover, Melanie K. Vanderhoof
Summary: Vulnerable waters play a crucial role in maintaining watershed resilience by storing, processing, and releasing water and materials. Modifying these waters can decrease resilience and trigger transitions to alternative watershed states. Spatial heterogeneity and temporal variability in hydrological and biogeochemical interactions are essential for resilient watersheds.
Article
Geosciences, Multidisciplinary
Jay R. Christensen, Heather E. Golden, Laurie C. Alexander, Brian R. Pickard, Ken M. Fritz, Charles R. Lane, Marc H. Weber, Rose M. Kwok, Madeline N. Keefer
Summary: This study reviews the geospatial datasets of stream and wetland in the United States and identifies their limitations. It also explores emerging technologies that can potentially improve the estimation, representation, and integration of these datasets.
EARTH-SCIENCE REVIEWS
(2022)
Review
Biodiversity Conservation
Bartosz P. Grudzinski, Ken Fritz, Heather E. Golden, Tammy A. Newcomer-Johnson, Jason A. Rech, Jonathan Levy, Justin Fain, Jessica L. McCarty, Brent Johnson, Teng Keng Vang, Karsten Maurer
Summary: Beavers are reclaiming their old habitats, expanding into new territories, and being protected for stream conservation in various environments. The effects of beaver dams on streams are complex and vary among different biomes. Most studies have been conducted in temperate forests, leaving many biomes understudied. Beaver dams prefer sites with low slopes, unconfined reaches, and small drainage areas. The impact of beaver dams on stream morphology and hydrology is relatively consistent across biomes, while water quality and biotic responses vary. Further research is needed in arid and cold biomes historically occupied by beavers and in new biomes where beaver populations are growing.
GLOBAL ECOLOGY AND CONSERVATION
(2022)
Article
Environmental Sciences
Paul M. Bradley, Kristin M. Romanok, Kelly L. Smalling, Michael J. Focazio, Nicola Evans, Suzanne C. Fitzpatrick, Carrie E. Givens, Stephanie E. Gordon, James L. Gray, Emily M. Green, Dale W. Griffin, Michelle L. Hladik, Leslie K. Kanagy, John T. Lisle, Keith A. Loftin, R. Blaine McCleskey, Elizabeth K. Medlock-Kakaley, Ana Navas-Acien, David A. Roth, Paul South, Christopher P. Weis
Summary: Despite concerns about environmental contaminant exposures and health risks in drinking water supplies, the consumption of bottled water has increased in the United States and globally. This study provides insight into exposures and cumulative risks to human health from inorganic/organic/microbial contaminants in bottled water.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Engineering, Environmental
Jason R. Masoner, Dana W. Kolpin, Isabelle M. Cozzarelli, Paul M. Bradley, Brian B. Arnall, Kenneth J. Forshay, James L. Gray, Justin F. Groves, Michelle L. Hladik, Laura E. Hubbard, Luke R. Iwanowicz, Jeanne B. Jaeschke, Rachael F. Lane, Richard Blaine McCleskey, Bridgette F. Polite, David A. Roth, Michael B. Pettijohn, Michaelah C. Wilson
Summary: The study compares the contributions of different reuse waters (wastewater effluent, urban stormwater, and agricultural runoff) to surface water contamination, revealing substantial organic-chemical contributions from each source. Episodic storm-event organic concentrations and loads from urban stormwater are comparable to and sometimes exceed those of daily wastewater effluent discharges. The study also assesses the impact of wastewater-effluent irrigation on organic-chemical concentrations in rain-induced agricultural runoff and harvested feedstock, finding minimal differences except for two specific organic substances in effluent-irrigated corn.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Heather E. Golden, Grey R. Evenson, Jay R. Christensen, Charles R. Lane
Summary: Despite widespread implementation of watershed nitrogen reduction programs, high nitrogen levels in surface waters remain. The long-term retention of nitrogen in soils and groundwater, known as watershed legacy nitrogen storage, is one factor contributing to this issue. However, scientists and water managers lack proper tools and monitoring approaches to understand how legacy nitrogen influences in-stream nitrogen responses to land conservation practices. We argue for improved watershed models and propose modeling solutions to facilitate long-term nitrogen-based sustainable land management globally.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Paul M. Bradley, Dana W. Kolpin, Darrin A. Thompson, Kristin M. Romanok, Kelly L. Smalling, Sara E. Breitmeyer, Mary C. Cardon, David M. Cwiertny, Nicola Evans, R. William Field, Michael J. Focazio, Laura E. Beane Freeman, Carrie E. Givens, James L. Gray, Gordon L. Hager, Michelle L. Hladik, Jonathan N. Hofmann, Rena R. Jones, Leslie K. Kanagy, Rachael F. Lane, R. Blaine McCleskey, Danielle Medgyesi, Elizabeth K. Medlock-Kakaley, Shannon M. Meppelink, Michael T. Meyer, Diana A. Stavreva, Mary H. Ward
Summary: Contaminant exposure in unregulated private-well tap water is a public health concern in the United States and globally. A study conducted in northeast Iowa farms found high levels of inorganics, organics, and microbial contaminants in private-well tap water. The presence of pesticides and bacteria in the water exceeds safe limits, highlighting the need for residential treatment systems and increased monitoring of rural private-well homes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Christopher D. D. Knightes
Summary: Anthropogenic sources of nutrients lead to eutrophication in coastal waters. This study developed a mechanistic, mass balance fate and transport modeling framework to improve the understanding of hypoxia processes in Narragansett Bay. The simulations captured general trends and patterns of dissolved oxygen (DO), but could not capture the wide diurnal variation observed. Different sources of nutrients were found to affect DO in different layers, with tributary sources affecting upper layers and sediment oxygen demand and nutrient fluxes affecting deeper waters. This work emphasizes the importance of understanding and simulating the legacy effects of historic nutrient loading for long-term recovery.
Article
Multidisciplinary Sciences
Samantha L. Rumschlag, Michael B. Mahon, Devin K. Jones, William Battaglin, Jonny Behrens, Emily S. Bernhardt, Paul Bradley, Ethan Brown, Frederik De Laender, Ryan Hill, Stefan Kunz, Sylvia Lee, Emma Rosi, Ralf Schaefer, Travis S. Schmidt, Marie Simonin, Kelly Smalling, Kristofor Voss, Jason R. Rohr
Summary: Based on the analysis of 6131 stream sites across different land uses in the United States over a period of 27 years, it was found that macroinvertebrate density declined by 11% and richness increased by 12.2%. Insect density and richness showed even greater declines of 23.3% and 6.8%, respectively. Furthermore, there was an increasing difference in richness and composition between urban and agricultural streams compared to forested and grassland streams. Urban and agricultural streams lost disturbance-sensitive taxa and gained disturbance-tolerant taxa. These findings indicate that current stream protection and restoration efforts are insufficient to mitigate the impacts of human activities.
Article
Environmental Sciences
Kelly L. Smalling, Kristin M. Romanok, Paul M. Bradley, Mathew C. Morriss, James L. Gray, Leslie K. Kanagy, Stephanie E. Gordon, Brianna M. Williams, Sara E. Breitmeyer, Daniel K. Jones, Laura A. DeCicco, Collin A. Eagles-Smith, Tyler Wagner
Summary: Drinking-water quality, specifically the presence of per- and poly-fluoroalkyl substances (PFAS), is a rising concern in the United States. This study conducted a national reconnaissance to compare PFAS exposures in unregulated private-well tapwater and regulated public-supply tapwater. The results showed that PFAS profiles and median cumulative concentrations were similar between private wells and public-supply tapwater. The study highlights the need for further assessments of PFAS health risks and the importance of considering co-occurring contaminants, particularly in unmonitored private wells.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Engineering, Environmental
Kelly L. Smalling, Paul M. Bradley, Kristin M. Romanok, Sarah M. Elliot, Jane de Lambert, Michael J. Focazio, Stephanie E. Gordon, James L. Gray, Leslie K. Kanagy, Michelle L. Hladik, Keith A. Loftin, R. Blaine McCleskey, Elizabeth K. Medlock-Kakaley, Mary C. Cardon, Nicola Evans, Christopher P. Weis
Summary: Continued improvements in drinking-water quality characterization and treatment/distribution infrastructure are necessary to deal with the increasing number of environmental contaminants. A study conducted in the greater Minneapolis/St. Paul area of Minnesota analyzed source water, finished water, and tapwater samples for a wide range of organic and inorganic contaminants. The study found mixtures of contaminants in all samples, highlighting the need for comprehensive assessments of mixed contaminant exposures to understand potential health risks.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Paul M. Bradley, Kristin M. Romanok, Kelly L. Smalling, Jason R. Masoner, Dana W. Kolpin, Stephanie E. Gordon
Summary: A comprehensive study of stormwater runoff events at 21 sites across the United States measured 438 organic and 62 inorganic chemicals, revealing localized contamination with potential adverse effects on aquatic health. By assessing cumulative ratios of exposure-activity cutoffs and cumulative toxicity quotients, the study found moderate to high risks for acute adverse effects on aquatic organisms across multiple trophic levels near stormwater discharge points. However, these results are likely significant underestimations of actual risk due to the limited number of compounds analyzed compared to those in commercial use and potential metabolites.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Environmental Sciences
Sara E. Breitmeyer, Heather L. Walsh, Vicki S. Blazer, John F. Bunnell, Patrick M. Burritt, Jeff Dragon, Michelle L. Hladik, Paul M. Bradley, Kristin M. Romanok, Kelly L. Smalling
Summary: Aquatic ecosystems are impacted by complex contaminant mixtures from anthropogenic pollution, including point and nonpoint sources. This study in New Jersey found that both point and nonpoint sources influenced the contaminant mixtures in surface waters, with landscape alteration being the primary driver of contaminant concentrations. Amphibians and fish exhibited health effects from these contaminants, with species-dependent variations observed. Understanding these findings is crucial for the conservation and management of aquatic species as development increases.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Bianca N. Ross, Christopher D. Knightes
Summary: This study investigates the behavior of nano copper oxide in a lake environment and finds that the highest concentrations of nano copper oxide and its dissolved product are found in the surface sediments. Simulation results show that increasing attachment efficiency leads to higher concentrations of nano copper oxide in the water column and sediments, while the opposite trend is observed for the dissolved product. The results highlight the importance of heteroaggregation in the behavior of nano copper oxide inputs and suggest the potential for legacy contamination in sediments.
