Article
Engineering, Civil
Na Zheng, Simin Jiang, Xuemin Xia, Weiming Kong, Zhi Li, Simin Gu, Zijun Wu
Summary: In this study, a hybrid inversion framework that combines GAN and CNN is proposed for groundwater model parameter estimation. The results demonstrate that by integrating WGAN-GP and OANW, the ILUES framework accurately characterizes aquifer parameters and significantly improves the efficiency of the computational process.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Da-won Lee, Yongtae Ahn, Kalimuthu Pandi, Joonhong Park, Seong-Teak Yun, Min Jang, Jaeyoung Choi
Summary: The study evaluated the denitrification potential in nitrate contaminated bedrock aquifers by injecting different carbon sources, among which acetate was identified as the optimum electron donor for microbial metabolic processes. The injection of acetate activated biological heterotrophic denitrification in the groundwater, leading to a significant nitrate reduction rate and an increase in the ratio of denitrification bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Civil
Valeria Todaro, Marco D'Oria, Maria Giovanna Tanda, J. Jaime Gomez-Hernandez
Summary: The article presents a new approach using ES-MDA method to determine the source location and time history of a pollutant in groundwater contamination events. Through two case studies, the method's application and impact in practice are demonstrated.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Hongyu Gu, Kuo Ding, Donghui Wang, Jianfei Yuan, Guoshi Deng, Yuqin Wang, Shenglin Lu
Summary: Evaluation of aquifer response to earthquakes was conducted in Changan Landfill using a multi-parameter monitoring system. The study revealed that the chemical characteristics of the shallow and deep aquifers were different, with the shallow aquifer being more polluted by leachate. The deep aquifer showed higher sensitivity to seismic stimuli and played a dominant role in coseismic responses. Tidal analysis indicated a general decrease in permeability during the monitoring period, reducing contaminant transport.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Water Resources
Hamed Sahranavard, Ali Mohtashami, Ehsan Mohtashami, Abolfazl Akbarpour
Summary: In this research, a simulation-optimization model called MLPG-MTLBO is used to estimate aquifer parameters on two aquifers. The model combines the meshless local Petrov-Galerkin simulation with the modified teaching-learning-based optimization algorithm. The results show that the MLPG-MTLBO model is accurate in estimating the aquifer parameters and can be applied to real field aquifers.
APPLIED WATER SCIENCE
(2023)
Article
Water Resources
Mohammad Javad Zeynali, Mohsen Pourreza-Bilondi, Abolfazl Akbarpour, Jafar Yazdi, Slim Zekri
Summary: Groundwater pollution is a significant global challenge, and monitoring and evaluating the quantity and quality of groundwater is crucial. This study investigates the effectiveness of the finite element method in modeling groundwater flow and contaminant transport over a 7-year period. The results demonstrate that the finite element model performs well in modeling both groundwater flow and contaminant transport.
APPLIED WATER SCIENCE
(2022)
Article
Engineering, Civil
Aref Panjehfouladgaran, Mohammad Mahdi Rajabi
Summary: This study addresses the challenge of contaminant source characterization in complex transient velocity fields, specifically in coastal aquifers. The proposed methodology combines a numerical model of density-dependent flow and multiple-species solute transport, artificial neural networks, and a customized Kalman filtering technique. It provides an effective way to estimate the location and strength of contaminant sources.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Environmental
YeoJin Ju, Dong-Chan Koh, Dong-Hun Kim, Bernhard Mayer, Hong-il Kwon
Summary: This study investigated a riparian aquifer in South Korea that was experiencing declining groundwater levels and elevated nitrate concentrations due to agricultural activities. The main sources of nitrate contamination were identified as manure and sewage, and denitrification was the dominant removal process. The study also found the presence of denitrification and anammox genes in the microbial communities, supporting effective natural nitrate attenuation. Denitrification reduced nitrate flux into the nearby stream, with most of the generated N2 escaping into the atmosphere.
Article
Engineering, Civil
E. John List
Summary: This study develops a theory for dispersion based on the probability density function of tracer particle velocities in the aquifer, using previously published field data from groundwater tracer studies in Hawaii. The aquifer dispersion coefficient is empirically derived from tracer breakthrough curves, and the Weibull distribution provides a better fit to the data than Fickian diffusion. The study also estimates the cross-sectional area of the aquifer occupied by the injectate plume and the percentage of treated wastewater in the tracer measurement sites.
JOURNAL OF HYDRAULIC ENGINEERING
(2022)
Article
Environmental Sciences
Emiel Kruisdijk, Carina Eisfeld, Pieter J. Stuyfzand, Boris M. van Breukelen
Summary: The evolution of denitrification kinetics in an ASTR system was investigated, showing an increase in first-order denitrification rate constants before and during ASTR operation, possibly due to microbial adaptation and bioaugmentation. Push-pull tests revealed negligible denitrification rate constants initially, with an increase after a lag-phase. During ASTR operation, denitrification rate constants increased over time, but were lower during storage periods. Denitrification coupled to pyrite oxidation was observed at all depths.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Computer Science, Interdisciplinary Applications
Nathaniel J. L. MacFadden, Ara N. Knaian
Summary: This article presents a new method for simulating particle transport through aerosols efficiently. By voxelizing the aerosol and generating 'droplets' voxel-by-voxel only when necessary, significant reductions in simulation time and memory usage can be achieved. The presented model demonstrates a decrease in simulation time of 1-2 orders of magnitude and a decrease in simulation memory of about 1 order of magnitude when compared to the benchmark method.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Environmental Sciences
Zhongyuan Xu, Jayaram Hariharan, Paola Passalacqua, Elisabeth Steel, Austin Chadwick, Chris Paola, Anner Paldor, Holly A. Michael
Summary: This study investigates the vulnerability of coastal deltaic aquifers to seawater intrusion, contamination, and groundwater abstraction, as well as the impact of surface deposition changes on the distribution and transport of groundwater solutes. By simulating groundwater flow and solute transport under different contamination scenarios, the research reveals that the vulnerability of deltaic aquifers to seawater intrusion is correlated with sand fraction, and vertical transport of contaminants is influenced by channel stacking patterns.
WATER RESOURCES RESEARCH
(2022)
Article
Geochemistry & Geophysics
Xu Li, Shilin Su, Qiang Guo, Haitao Zhang, Qi Zhu, Hamza Jakada
Summary: The study finds that regional groundwater flow has a negative impact on the quality of groundwater extracted by seasonally pumping wells. A larger regional groundwater velocity results in lower concentration of contaminants. During pumping, a smaller recovery ratio inside the wellbore facilitates the deterioration of water quality in the deep aquifer. Increasing pumping frequency can effectively prevent contamination and improve water quality in the deep aquifer. Similarly, a higher pumping rate leads to a larger capture zone, significantly improving water quality in the deep aquifer.
Article
Engineering, Civil
Maosheng Yin, Rui Ma, Yong Zhang, Jingjing Lin, Zhilin Guo, Chunmiao Zheng
Summary: This study conducted a field tracer test in an alluvial aquifer in Tongzhou, Beijing, China, and found that multiscale medium heterogeneity had a significant impact on solute transport. The study revealed that the impact of regional-scale heterogeneity on solute transport increased with increasing discrepancy in hydraulic conductivity between adjacent hydrofacies, while subhydrofacies-scale heterogeneity played an important role when the mean hydraulic conductivity of adjacent hydrofacies became more similar. These findings provide new insights into the control mechanism of multiscale heterogeneity on solute transport.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Seonkyoo Yoon, Seunghak Lee, Jiangjiang Zhang, Lingzao Zeng, Peter K. Kang
Summary: Groundwater contamination poses a severe threat to human health globally, and subsurface remediation has become increasingly important. This study presents a novel inversion method based on ensemble smoothing to identify the locations of multiple contaminant sources in three-dimensional heterogeneous aquifer systems. The integration of a clustering-based covariance localization algorithm improves the accuracy of multi-source identification.
JOURNAL OF HYDROLOGY
(2023)
Article
Geosciences, Multidisciplinary
N. Kettridge, M. C. Lukenbach, K. J. Hokanson, C. Hopkinson, K. J. Devito, R. M. Petrone, C. A. Mendoza, J. M. Waddington
GEOPHYSICAL RESEARCH LETTERS
(2017)
Article
Water Resources
Simon J. Dixon, Nicholas Kettridge, Paul A. Moore, Kevin J. Devito, Amey S. Tilak, Richard M. Petrone, Carl A. Mendoza, James M. Waddington
HYDROLOGICAL PROCESSES
(2017)
Article
Geosciences, Multidisciplinary
R. M. Leonard, N. Kettridge, K. J. Devito, R. M. Petrone, C. A. Mendoza, J. M. Waddington, S. Krause
GEOPHYSICAL RESEARCH LETTERS
(2018)
Article
Water Resources
Craig Thompson, Kevin J. Devito, Carl A. Mendoza
HYDROLOGICAL PROCESSES
(2018)
Article
Water Resources
Haley M. Spennato, Scott J. Ketcheson, Carl A. Mendoza, Sean K. Carey
HYDROLOGICAL PROCESSES
(2018)
Article
Environmental Sciences
K. J. Hokanson, C. A. Mendoza, K. J. Devito
WATER RESOURCES RESEARCH
(2019)
Article
Environmental Sciences
M. Little-Devito, C. A. Mendoza, L. Chasmer, N. Kettridge, K. J. Devito
WETLANDS ECOLOGY AND MANAGEMENT
(2019)
Article
Environmental Sciences
M. C. Lukenbach, C. J. Spencer, C. A. Mendoza, K. J. Devito, S. M. Landhausser, S. K. Carey
WATER RESOURCES RESEARCH
(2019)
Article
Environmental Sciences
K. J. Hokanson, E. S. Peterson, K. J. Devito, C. A. Mendoza
ENVIRONMENTAL RESEARCH LETTERS
(2020)
Article
Environmental Sciences
R. Leonard, P. Moore, S. Krause, K. J. Devito, G. R. Petrone, C. Mendoza, J. M. Waddington, N. Kettridge
Summary: Temperatures at the soil-atmosphere interface play a crucial role in ecosystem function by driving nonlinear processes. The complexity of thermal ecosystems created by interacting and heterogeneous layers remains unclear, especially in peatlands. System heterogeneity influences thermal regimes, with not all layers having equal impact, and changes in extremes may occur without significant alterations in overall temperatures, highlighting the need for further research on small-scale thermal dynamics and their impact on ecosystem function.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Water Resources
Nicholas Kettridge, Maxwell C. Lukenbach, Kelly J. Hokanson, Kevin J. Devito, Richard M. Petrone, Carl A. Mendoza, James Michael Waddington
Summary: The impact of wildfires on peatland ecosystems can significantly affect their ability to regulate evapotranspiration, which is crucial for predicting hydrological conditions and carbon stocks under future climate scenarios.
HYDROLOGICAL PROCESSES
(2021)
Article
Green & Sustainable Science & Technology
Teresa Y. Rosales-Ramirez, Dirk Kirste, Diana M. Allen, Carl A. Mendoza
Summary: This study used the TOUGH2 code to quantify the time and distance of travel of saline wastewater plumes in different hydrogeological settings in Northeast British Columbia. The permeability of the vadose zone and depth to water table were found to be dominant controls on the migration rate and footprint of wastewater. Overall, vulnerability in the region is relatively low, except for areas near river valleys and with shallow water tables.
Article
Geosciences, Multidisciplinary
K. J. Hokanson, B. J. Rostron, K. J. Devito, C. Hopkinson, C. A. Mendoza
Summary: The study shows that landscape position is the dominant control over relative groundwater contributions to shallow lakes in low-relief glaciated areas. Lakes at low landscape positions with large potential groundwater capture areas have relatively higher and more consistent groundwater contributions, while lakes at high landscape positions experience high interannual variability due to lack of groundwater input to buffer changes caused by evaporation and precipitation.
HYDROGEOLOGY JOURNAL
(2022)
Article
Environmental Sciences
Judit Deri-Takacs, Benjamin, Carl Mendoza, Judit Madl-Szonyi
Summary: This study characterizes the chemical compositions, water types, and hydrochemical processes of groundwaters and surface waters in Wood Buffalo National Park in Canada. The findings contribute to advancing knowledge on the hydrochemical characteristics of this remote and highly protected region and are important for further assessment of the natural water conditions.
Article
Water Resources
Rhoswen Leonard, Paul Moore, Stefan Krause, Laura Chasmer, Kevin J. Devito, Richard M. Petrone, Carl Mendoza, James Michael Waddington, Nicholas Kettridge
Summary: This study critically evaluates the influence of compositional and organizational complexity on evapotranspiration (ET) dynamics in open-canopy forest systems. The results demonstrate that including forest stand complexity and associated radiation variability increases ET model estimates and improves model performance.
HYDROLOGICAL PROCESSES
(2022)
Article
Engineering, Civil
Arfan Arshad, Ali Mirchi, Javier Vilcaez, Muhammad Umar Akbar, Kaveh Madani
Summary: High-resolution, continuous groundwater data is crucial for adaptive aquifer management. This study presents a predictive modeling framework that incorporates covariates and existing observations to estimate groundwater level changes. The framework outperforms other methods and provides reliable estimates for unmonitored sites. The study also examines groundwater level changes in different regions and highlights the importance of effective aquifer management.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Lihua Chen, Jie Deng, Wenzhe Yang, Hang Chen
Summary: A new grid-based distributed karst hydrological model (GDKHM) is developed to simulate streamflow in the flood-prone karst area of Southwest China. The results show that the GDKHM performs well in predicting floods and capturing the spatial variability of karst system.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Faruk Gurbuz, Avinash Mudireddy, Ricardo Mantilla, Shaoping Xiao
Summary: Machine learning algorithms have shown better performance in streamflow prediction compared to traditional hydrological models. In this study, researchers proposed a methodology to test and benchmark ML algorithms using artificial data generated by physically-based hydrological models. They found that deep learning algorithms can correctly identify the relationship between streamflow and rainfall in certain conditions, but fail to outperform traditional prediction methods in other scenarios.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Yadong Ji, Jianyu Fu, Bingjun Liu, Zeqin Huang, Xuejin Tan
Summary: This study distinguishes the uncertainty in drought projection into scenario uncertainty, model uncertainty, and internal variability uncertainty. The results show that the estimation of total uncertainty reaches a minimum in the mid-21st century and that model uncertainty is dominant in tropical regions.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Z. R. van Leeuwen, M. J. Klaar, M. W. Smith, L. E. Brown
Summary: This study quantifies the effectiveness of leaky dams in reducing flood peak magnitude using a transfer function noise modelling approach. The results show that leaky dams have a significant but highly variable impact on flood peak magnitude, and managing expectations should consider event size and type.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Zeda Yin, Yasaman Saadati, M. Hadi Amini, Linlong Bian, Beichao Hu
Summary: Combined sewer overflows pose significant threats to public health and the environment, and various strategies have been proposed to mitigate their adverse effects. Smart control strategies have gained traction due to their cost-effectiveness but face challenges in balancing precision and computational efficiency. To address this, we propose exploring machine learning models and the inversion of neural networks for more efficient CSO prediction and optimization.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Qimou Zhang, Jiacong Huang, Jing Zhang, Rui Qian, Zhen Cui, Junfeng Gao
Summary: This study developed a N-cycling model for lowland rural rivers covered by macrophytes and investigated the N imports, exports, and response to sediment dredging. The findings showed a considerable N retention ability in the study river, with significant N imports from connected rivers and surrounding polders. Sediment dredging increased particulate nitrogen resuspension and settling rates, while decreasing ammonia nitrogen release, denitrification, and macrophyte uptake rates.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Xue Li, Yingyin Zhou, Jian Sha, Man Zhang, Zhong-Liang Wang
Summary: High-resolution climate data is crucial for predicting regional climate and water environment changes. In this study, a two-step downscaling method was developed to enhance the spatial resolution of GCM data and improve the accuracy for small basins. The method combined medium-resolution climate data with high-resolution topographic data to capture spatial and temporal details. The downscaled climate data were then used to simulate the impacts of climate change on hydrology and water quality in a small basin. The results demonstrated the effectiveness of the downscaling method for spatially differentiated simulations.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Tongqing Shen, Peng Jiang, Jiahui Zhao, Xuegao Chen, Hui Lin, Bin Yang, Changhai Tan, Ying Zhang, Xinting Fu, Zhongbo Yu
Summary: This study evaluates the long-term interannual dynamics of permafrost distribution and active layer thickness on the Tibetan Plateau, and predicts future degradation trends. The results show that permafrost area has been decreasing and active layer thickness has been increasing, with an accelerated degradation observed in recent decades. This has significant implications for local water cycle processes, water ecology, and water security.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Chi Zhang, Xu Zhang, Qiuhong Tang, Deliang Chen, Jinchuan Huang, Shaohong Wu, Yubo Liu
Summary: Precipitation over the Tibetan Plateau is influenced by systems such as the Asian monsoons, the westerlies, and local circulations. The Indian monsoon, the westerlies, and local circulations are the main systems affecting precipitation over the entire Tibetan Plateau. The East Asian summer monsoon primarily affects the eastern Tibetan Plateau. The Indian monsoon has the greatest influence on precipitation in the southern and central grid cells, while the westerlies have the greatest influence on precipitation in the northern and western grid cells. Local circulations have the strongest influence on the central and eastern grid cells.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Manuel Almeida, Antonio Rodrigues, Pedro Coelho
Summary: This study aimed to improve the accuracy of Total Phosphorus export coefficient models, which are essential for water management. Four different models were applied to 27 agroforestry watersheds in the Mediterranean region. The modeling approach showed significant improvements in predicting the Total Phosphorus diffuse loads.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Yutao Wang, Haojie Yin, Ziyi Wang, Yi Li, Pingping Wang, Longfei Wang
Summary: This study investigated the distribution and transformation of dissolved organic nitrogen (DON) in riverbed sediments impacted by effluent discharge. The authors found that the spectral characteristics of dissolved organic matter (DOM) in surface water and sediment porewater could be used to predict DON variations in riverbed sediments. Random forest and extreme gradient boosting machine learning methods were employed to provide accurate predictions of DON content and properties at different depths. These findings have important implications for wastewater discharge management and river health.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Saba Mirza Alipour, Kolbjorn Engeland, Joao Leal
Summary: This study assesses the uncertainty associated with 100-year flood maps under different scenarios using Monte Carlo simulations. The findings highlight the importance of employing probabilistic approaches for accurate and secure flood maps, with the selection of probability distribution being the primary source of uncertainty in precipitation.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Janine A. de Wit, Marjolein H. J. van Huijgevoort, Jos C. van Dam, Ge A. P. H. van den Eertwegh, Dion van Deijl, Coen J. Ritsema, Ruud P. Bartholomeus
Summary: The study focuses on the hydrological consequences of controlled drainage with subirrigation (CD-SI) on groundwater level, soil moisture content, and soil water potential. The simulations show that CD-SI can improve hydrological conditions for crop growth, but the success depends on subtle differences in geohydrologic characteristics.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Constantin Seidl, Sarah Ann Wheeler, Declan Page
Summary: Water availability and quality issues will become increasingly important in the future due to climate change impacts. Managed Aquifer Recharge (MAR) is an effective water management tool, but often overlooked. This study analyzes global MAR applications and identifies the key factors for success, providing valuable insights for future design and application.
JOURNAL OF HYDROLOGY
(2024)