Article
Engineering, Civil
Karyne M. Rogers, Rob van der Raaij, Andy Phillips, Mike Stewart
Summary: A national survey in New Zealand uses nitrogen and oxygen isotopes to identify the extent and sources of nitrates in freshwater resources. The study investigates the impact of various factors on nitrate isotopes and finds that nitrate contamination is a significant threat to drinking water resources in New Zealand. Groundwater has higher nitrate concentrations compared to surface water, and the unique farming practices in New Zealand contribute to the nitrate pollution.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Eunhye Kwon, Jonghoon Park, Won-Bae Park, Bong-Rae Kang, Nam C. Woo
Summary: The study on nitrate contamination in coastal groundwater of Jeju volcanic island in Korea reveals that the contamination mainly originates from chemical fertilizers and local livestock industries, with two transport processes identified. The potential sources of nitrate reach up to 600 meters above mean sea level, and isotopic signatures suggest the coastal groundwater could originate from upland areas up to 1280 meters above mean sea level.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Eun-Hee Koh, Dugin Kaown, Sun-Hwa Park, Hyunkoo Kim, Kang-Kun Lee
Summary: This study used environmental tracers to investigate the sources, timing, and pathways of NO3- contamination in groundwater. Livestock waste was identified as the major source of N, and younger groundwater showed a higher influence from livestock waste. Additionally, historical groundwater with elevated NO3-N concentrations may have been affected by faster inflows of livestock waste through permeable volcanic structures. Comprehensive understanding of NO3- contamination processes can be achieved using environmental tracer methods for efficient groundwater resource management in areas with multiple N sources.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Raul Carrey, Elisenda Balleste, Anicet R. Blanch, Francisco Lucena, Pere Pons, Juan Manuel Lopez, Marina Rull, Joan Sola, Nuria Micola, Josep Fraile, Teresa Garrido, Antoni Munne, Albert Soler, Neus Otero
Summary: This study investigated the identification of nitrate sources using multi-isotopic analysis combined with fecal indicator bacteria and microbial source tracking techniques. The results showed that isotopes and MST analyses were complementary, providing more reliable information on the source of nitrate contamination, particularly useful for tracing nitrate pollution in surface water.
Article
Environmental Sciences
Xiaopeng Yu, Furong Yu, Zhiping Li, Tongyang Shi, Zhiguo Xia, Guangning Li
Summary: This study investigated the occurrence and distribution of four commonly used artificial sweeteners (ASs) in the effluent of wastewater treatment plants, surface water, and groundwater in the middle and lower reaches of the Yellow River. The results showed that sucralose was dominant in wastewater treatment plant effluents and had the highest mass loading. ACE, CYC, SAC, and SUC were consistently detected in surface water. The risk assessment indicated that the risks of these ASs to aquatic organisms were negligible.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geochemistry & Geophysics
Andrew H. Manning, Robert L. Runkel, Jean M. Morrison, Richard B. Wanty, Katherine Walton-Day
Summary: This study combines stream mass-loading approach with data from streambank wells to estimate bank-specific metal loading rates. The results successfully identify the dominant sources of loading, including natural weathering and mining-related sources. The study also shows that groundwater residence time and flow path variations have little influence on groundwater discharge chemistry compared to variations in bedrock and soil composition.
APPLIED GEOCHEMISTRY
(2022)
Article
Water Resources
Krzysztof Dragon
Summary: This study examines the groundwater flow patterns and chemistry in the studied recharge zone of Quaternary aquifers in Poland. It found that water extraction influences groundwater contamination, leading to different chemistry in deep and shallow parts of the aquifer. The research highlights the importance of using groundwater chemistry to understand groundwater flow systems.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Computer Science, Information Systems
Lanyu Shang, Yang Zhang, Quanhui Ye, Shannon L. Speir, Brett W. Peters, Ying Wu, Casey J. Stoffel, Diogo Bolster, Jennifer L. Tank, Danielle M. Wood, Na Wei, Dong Wang
Summary: Groundwater contamination poses a serious threat and existing solutions are time-consuming and unscalable. This paper presents a crowdsensing approach, using crowd sensors to estimate nitrate concentration in groundwater samples. To address challenges such as spatial irregularity, hidden temporal dependency, and uncertainty of crowdsensing nitrate measurements, a graph neural network framework called CrowdWaterSens is developed. The framework is evaluated in real-world case studies and demonstrates the effectiveness of accurately estimating nitrate concentration and the viability of crowdsensing for groundwater quality monitoring at a community level.
PERVASIVE AND MOBILE COMPUTING
(2023)
Article
Engineering, Chemical
Walter Thavarajah, Patrick Mbullo Owuor, Diana Ross Awuor, Karlmax Kiprotich, Rahul Aggarwal, Julius B. Lucks, Sera L. Young
Summary: Geogenic fluoride contamination affects the drinking water of tens of millions of people, and the detection methods have shortcomings. A study assesses the accuracy and usability of a point-of-use fluoride biosensor through surveys and field tests in Nakuru County, Kenya. The biosensor tests accurately detected elevated fluoride levels in 89.5% of the samples, and all participants were able to use the test and interpret the results correctly. These findings suggest that biosensor tests can provide accurate water quality data for non-experts to make informed decisions.
Article
Environmental Sciences
Marko Srajbek, Lado Kranjcevic, Ivan Kovac, Ranko Biondic
Summary: This paper presents a study on the groundwater quality and nitrate pollution at Varazdin wellfield in Croatia. The study finds that the nitrate concentration has been consistently above the allowed limit, making the development of new wellfields expensive. Using a groundwater flow model, the influential zone and sources of nitrate pollution are identified. The simulation results indicate that a poultry landfill is the main source of nitrate pollution, while poultry farms in the vicinity also contribute significantly.
Article
Environmental Sciences
Dan Wang, Peiyue Li, Ningning Yang, Chunliu Yang, Yuhan Zhou, Jiahui Li
Summary: This study used chemical indicators, dual isotopes of nitrate, random forest model, and Bayesian stable isotope mixing model to investigate the sources and destiny of nitrate in soil and groundwater within intensive agricultural areas. The results showed that nitrate accumulation in cropland and kiwifruit orchard led to subsequent leaching into deeper vadose zones and ultimately groundwater. The study also identified key variables influencing groundwater nitrate concentration and quantified the sources contribution at various depths.
ENVIRONMENTAL RESEARCH
(2023)
Article
Water Resources
Mary Etuk, Stefano Viaroli, Igwe Ogbonnaya, Vivana Re
Summary: The rapid population growth in Abuja Federal Capital Territory has led to significant land use changes, potentially impacting groundwater quality. However, the lack of understanding of hydrogeological settings due to limited data availability hinders sound planning. This study assesses groundwater vulnerability to nitrate using a DRASTIC-LU model, combining land use data with aquifer vulnerability. The findings highlight the potential nitrate contamination and serve as a starting point for future monitoring and urban planning.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Environmental Sciences
Dandan Li, Qiuda Zheng, Kevin V. Thomas, Anh Kim Dang, Vu Ngan Binh, Nguyen Thi Kieu Anh, Phong K. Thai
Summary: Wastewater analysis was used to evaluate the consumption of artificial sweeteners in an urban population in Hanoi, Vietnam. The study found that the daily consumption of artificial sweeteners was stable throughout the week, but varied with different seasons. There were significant correlations between artificial sweeteners and caffeine, indicating common sources.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Civil
S. Focaccia, G. Panini, P. Pedrazzoli, V Ciriello
Summary: This study proposes a quantitative predictive approach in hydrology using meta-modeling techniques to assess the potential impact of climate change on groundwater nitrate concentration. Through global sensitivity analysis and Monte Carlo simulations, the relative influence of factors on long-term prediction of groundwater nitrate concentration can be evaluated, providing a comprehensive understanding of the probabilistic behavior of QoI in the study area.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
M. Eryigit, B. Engel
Summary: This study simulated groundwater flow and nitrate transport in the Upper White River Watershed in Indiana, US, using MODFLOW, MT3DMS, and a modified Clonal Selection Algorithm for model calibration. The results showed that the models performed well in terms of nitrate fate and transport in the watershed under different scenarios.
JOURNAL OF ENVIRONMENTAL INFORMATICS
(2022)
Article
Water Resources
Myra Martel, Aaron Glenn, Henry Wilson, Serban Danielescu, Roland Krobel, Ward Smith, Brian McConkey, Geoffrey Guest, Henry Janzen
Summary: This study developed a simple and easy-to-use soil water budget model that can simulate and describe the water dynamics in Canadian agricultural soils with very limited data. The model was tested on three site-specific datasets and was shown to perform comparably with other agricultural models using cascade flow framework for hydrology, despite its simplicity.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Water Resources
Victoria R. Propp, Susan J. Brown, Pamela Collins, James E. Smith, James W. Roy
Summary: The study successfully used artificial sweeteners to distinguish groundwater discharge areas influenced by historical landfill leachate and wastewater, and found that contaminant discharge patterns were strongly controlled by hyporheic flow and stream sinuosity, differing from past studies.
GROUND WATER MONITORING AND REMEDIATION
(2022)
Article
Geosciences, Multidisciplinary
James W. Roy, Genevieve Bordeleau, Christine Rivard, M. Cathryn Ryan, Xavier Malet, Susan J. Brown, Vincent Tremblay
Summary: This study investigates the use of P-TDG probes for long-term monitoring of methane-rich groundwater. The study finds that P-TDG probes provide a reasonable proxy for methane concentrations and reveal both long-term stability and short-term variability in methane concentrations.
HYDROGEOLOGY JOURNAL
(2022)
Article
Environmental Sciences
Serban Danielescu, Mihai Cristian Adamescu, Sorin Cheval, Alexandru Dumitrescu, Constantin Cazacu, Mihaela Borcan, Carmen Postolache
Summary: The impacts of future climate changes on hydrological processes in a Romanian catchment were evaluated using global circulation models and the SWAT model. The results showed that the future changes in precipitation and temperature will lead to increased water stress in the area, with changes in soil water content, streamflow, and snow amount. The study also assessed the sensitivity of hydrological processes in the lower portions of the catchment to climate change.
Article
Engineering, Civil
Kyle Robinson, Clare E. Robinson, James W. Roy, Meghan Vissers, Angelos Almpanis, Uwe Schneidewind, Christopher Power
Summary: This study demonstrates the value of DC-IP imaging, in both 3D and high-resolution, for characterizing streambed architecture and interpreting groundwater-surface water exchange patterns. It shows that DC-IP imaging can provide rapid, non-invasive, and continuous information on streambed lithology and its control on GW-SW exchanges, which has been underutilized in previous investigations.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Petre Bretcan, Danut Tanislav, Cristiana Radulescu, Gheorghe Serban, Serban Danielescu, Michael Reid, Daniel Dunea
Summary: This study evaluated the quality of shallow groundwater in the rural area of the Targoviste Plain and found that 43% of the rural population's health is affected by contaminated groundwater. It is estimated that about 600 people could develop cancer due to consuming contaminated groundwater. The quality of groundwater is influenced by factors such as the intensity of agricultural land use, depth of the groundwater layer, and distance from main water sources and cities.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Serban Danielescu, Kerry T. B. MacQuarrie, Bernie Zebarth, Judith Nyiraneza, Mark Grimmett, Mona Levesque
Summary: The global increase in potato production is expected to result in higher irrigation needs, raising concerns about the sustainability of groundwater sources. This study estimated the crop water requirements and irrigation needs for potato production in Prince Edward Island, Canada, and evaluated their impact on aquifer storage. Depending on the efficiency and extent of the irrigation system, the irrigation water supply requirement can approach or exceed the groundwater recharge.
Article
Meteorology & Atmospheric Sciences
Serban Danielescu
Summary: ETCalc is a free online tool that integrates eight methods for estimating daily evapotranspiration and is applicable to any area with basic meteorological data.
Article
Geosciences, Multidisciplinary
Serban Danielescu
Article
Engineering, Civil
Meghan A. Vissers, James W. Roy, Adam G. Yates, Kyle Robinson, Sabina Rakhimbekova, Clare E. Robinson
Summary: Streambed sediment and groundwater are important sources of soluble reactive phosphorus (SRP) in freshwater catchments. This study evaluates the variability and controls on porewater SRP in an agricultural streambed, finding high SRP concentrations in low groundwater discharge zones and a link to iron and manganese redox cycling. Temporal variability in porewater SRP was observed, but no distinct seasonal changes were observed along the stream reach.
JOURNAL OF HYDROLOGY
(2023)
Article
Ecology
L. K. Banks, I. Lavoie, M. P. Boreux, S. L. Kroeze, N. Gotkowski, C. E. Robinson, J. W. Roy, A. G. Yates
Summary: This study assessed the association between groundwater and stream biofilm communities and processes in a headwater stream network in southern Ontario, Canada. The results showed that seasonal variation played a significant role in driving diatom assemblage composition and cellulose decomposition. However, there was no association between groundwater input and stream biofilm condition, suggesting surface water influences may have overwhelmed the groundwater signal at the reach scale.
Article
Environmental Sciences
Tammy Hua, Victoria R. Propp, Christopher Power, Susan J. Brown, Pamela Collins, James E. Smith, James W. Roy
Summary: This study investigated the exposure of different aquatic organisms to contaminants from a historic landfill plume in a pond. The findings showed that the plume had a significant and variable impact on the various ecological zones of the pond, highlighting the need for improved monitoring, assessment, and remediation protocols.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2023)
Article
Marine & Freshwater Biology
L. K. Banks, I. Lavoie, C. E. Robinson, J. W. Roy, A. G. Yates
Summary: This study assessed the stream biofilm communities and cellulose decomposition in run and riffle habitats across three stream reaches with different groundwater inputs in Kintore Creek, Canada. The results showed that algal biomass and diatom assemblage composition differed between runs and riffles in reaches with moderate and high groundwater inputs, but not in the low groundwater reach. Additionally, streambed cellulose decomposition was faster in riffles than in runs in reaches with moderate and high groundwater input.
Article
Water Resources
Igor Pavlovskii, Yefang Jiang, Serban Danielescu, Barret L. Kurylyk
Summary: The present study investigates the impact of precipitation event magnitude on baseflow and associated groundwater-driven nitrate export in Prince Edward Island, Canada. It reveals a non-linear relationship between precipitation event magnitude and baseflow change, which is also observed for precipitation events associated with hurricanes and post tropical storms. The results show that baseflow increases after heavy precipitation events have limited impact on streamflow concentrations but result in substantial and sustained increase of nitrate export.
HYDROLOGICAL PROCESSES
(2023)
Article
Geosciences, Multidisciplinary
Jason J. KarisAllen, Aaron A. Mohammed, Joseph J. Tamborski, Rob C. Jamieson, Serban Danielescu, Barret L. Kurylyk
Summary: This study investigates the thermal influence of intertidal springs on coastal waters and their thermal sensitivity to climate change through field and model-based research. The results show that intertidal springs dominate heat transfer at a local scale, creating pronounced cold-water plumes along the shoreline. Additionally, a numerical model was used to analyze seasonal and multi-decadal groundwater temperature patterns and predict future groundwater warming.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2022)