Article
Environmental Sciences
Wanzhou Wang, Shujian Li, Jineng Sun, Yanan Huang, Fengpeng Han, Zhi Li
Summary: The loess-covered region, accounting for about 10% of global land surface, has a complex and controversial groundwater recharge mechanism. This study on the tablelands of China's Loess Plateau reveals the involvement of both regional-scale piston flow and local-scale preferential flow in groundwater recharge, with piston flow dominating. The recharge forms are controlled by vadose zone thickness, and precipitation is the main driver of recharge rates. The findings are important for groundwater modeling and studying recharge mechanisms in thick aquifers.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Civil
Peter G. Cook, Eddie W. Banks, Sarah K. Marshall, Glenn A. Harrington, Jordi Batlle-Aguilar, Shawan Dogramaci, Chris Turnadge
Summary: Faults can act as barriers or conduits to groundwater flow. Groundwater age inferred from hydrochemical data is a useful tool to estimate both barrier and conduit behavior. This study presents field measurements across three fault systems and discusses conceptual models of hydraulic head and groundwater age. The results show the importance of high data density to characterize fault zones.
JOURNAL OF HYDROLOGY
(2022)
Article
Engineering, Civil
Peijun Shi, Yanan Huang, Congying Yang, Zhi Li
Summary: This study utilized multiple tracers and methods to investigate the groundwater recharge mechanism in thick loess deposits, revealing that local precipitation primarily recharges groundwater through matrix flow and the impact of vegetation types and land use on deep drainage.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Marylynn Musgrove, Bryant C. Jurgens, Stephen P. Opsahl
Summary: The vulnerability of karst aquifers to land-surface contamination follows similar patterns as other porous-media type aquifers, with shallow and unconfined parts being more susceptible. Groundwater age tracers combined with other geochemical tracers can provide insights into vulnerability to contamination and residence time. Understanding groundwater contamination risks is crucial for resource management.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
YeoJin Ju, Arash Massoudieh, Christopher T. Green, Kang-Kun Lee, Dugin Kaown
Summary: This study was conducted in a coastal aquifer near the Yellow Sea in South Korea, using multiple age tracers for Bayesian inference to investigate groundwater age distributions and associated uncertainties. The results revealed complex age distributions near seawater intrusion areas and upland recharge zones, indicating converging paths of different ages in these regions. The Bayesian inference identified significant uncertainties, particularly for older age distributions, providing insights into flow dynamics at a complex seawater interface.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Automation & Control Systems
Masaya Murata, Isao Kawano, Koichi Inoue
Summary: In this paper, a new algorithm called ensemble Kalman smoother multiple distribution estimation filter (EnKS-MDEF) is proposed for nonlinear state estimation problems. The EnKS-MDEF is a particle filter that estimates the filtered state probability density function (pdf) using multiple conditional state pdfs. The EnKS-MDEF utilizes the ensemble Kalman smoother (EnKS) to approximate the one step behind (OSB) smoothed state pdf, which enables simultaneous estimation of filtered and OSB smoothed states. The performance of the EnKS-MDEF is evaluated and compared with other representative filters using benchmark simulation problems.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2022)
Article
Environmental Sciences
Roseane A. S. Albani, Vinicius V. L. Albani, Luiz E. S. Gomes, Helio S. Migon, Antonio J. Silva Neto
Summary: We propose a methodology that combines a data-driven dispersion model with Bayesian inference and uncertainty quantification to identify multiple pollutant sources in the atmosphere. The dispersion model incorporates a realistic wind field based on measured wind components time series. Bayesian inference accounts for uncertainty in concentration data and balances the prior and likelihood. Source parameters are estimated using a Metropolis in Gibbs MCMC algorithm with adaptive steps, initialized with a maximum a posteriori estimator obtained with particle swarm optimization. The proposed methodology seems to outperform inversion techniques from previous works.
ENVIRONMENTAL POLLUTION
(2023)
Article
Water Resources
Kevin O. Achieng, Jianting Zhu
Summary: Groundwater recharge is vital for maintaining water balance and managing climate change impacts. Few studies focus on Bayesian frameworks related to groundwater recharge. This study demonstrates that proper Bayesian priors can produce accurate groundwater recharge estimates from multiple climate models.
JOURNAL OF WATER AND CLIMATE CHANGE
(2021)
Article
Engineering, Industrial
Marie Chiron, Christian Genest, Jerome Morio, Sylvain Dubreuil
Summary: This paper addresses the challenge of importance sampling in high-dimensional space to estimate the failure probability of a physical system subject to randomness. A new approach is developed to construct importance sampling densities for multiple failure regions identified through optimization. The proposed method demonstrates efficiency in high-dimensional space when the gradient of the performance function defining the failure domain is available.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Engineering, Multidisciplinary
Fuad S. Alduais, Mansour F. Yassen, Mohammed M. A. Almazah, Zahid Khan
Summary: This paper presents the Bayesian estimation of parameters in the Kumaraswamy distribution (KD) using type-II censoring data. Several loss functions are introduced, and the gamma distribution is utilized as a conjugate distribution in the Bayesian framework. A new loss function called the weighted composite loss function (WCLLF) is established, and it outperforms other methods in determining the shape parameter of the KD, as shown in the Monte Carlo simulation.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Civil
Kirsten E. Faulkner, Bryant C. Jurgens, Stefan A. Voss, Danielle I. Dupuy, Zeno F. Levy
Summary: This study investigates the penetration depth of post-1950s recharge in aquifers to identify groundwater vulnerable to human contamination. The study uses a four-dimensional approach to compute, interpolate, and project the depth values across time in the Central Valley aquifer system in California. The results show that the penetration depth is expected to increase in the future, which may lead to an increase in anthropogenic contaminants.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Eun-Hee Koh, Eunhee Lee, Kang-Kun Lee, Duk-Cheol Moon
Summary: The combined use of a Bayesian mixing model, numerical model (random walk particle tracking), and environmental tracers was applied to study the groundwater recharge sources, flow path, and residence time in the mountainous area of Jeju Island, South Korea. The study revealed that precipitation during the wet season was the primary source of groundwater, contributing to approximately 64% of the total recharge. Different elevations showed mixed contributions to the recharge sources, and the flow path differed between highland and lowland wells. The study highlights the importance of using integrated analysis techniques to enhance the reliability of recharge area estimation and improve the understanding of complex hydrogeological systems in mountainous areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
A. T. M. Sakiur Rahman, Takahiro Hosono, Yasuhiro Tawara, Youichi Fukuoka, Aurelien Hazart, Jun Shimada
Summary: Integrated watershed modeling techniques with multiple tracers were applied to characterize regional-scale hydrological processes in Kumamoto. The new model showed acceptable accuracy for hydrographs and tracers, providing more reliable estimates of groundwater storage, age, and flow paths over the regional catchment. The incorporation of multiple tracer data addressed the structural uncertainty of the model, allowing for a better understanding of contaminant transport dynamics.
HYDROGEOLOGY JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Keqi Wang, Wei Xie, Sarah W. Harcum
Summary: The development of a metabolic kinetic model that predicts cell response and supports process control in iPSC culture process is presented. The model focuses on the central carbon metabolic network and provides reliable predictions on cellular metabolism and culture process dynamics. This can aid in selecting optimal cell culture conditions and facilitating large-scale production.
BIOTECHNOLOGY AND BIOENGINEERING
(2023)
Editorial Material
Environmental Sciences
Jin-Yong Lee, Jihye Cha, Eunju Jeong, Young-In Kim
Summary: This paper highlights the critical weak points and mistakes identified in the original paper, such as disregarding the importance of field practices, sampling equipment, and polymer types for reliable laboratory analysis of microplastics. It emphasizes the need for proper quality assurance and control measures in understanding the distribution and transport of microplastics.
Article
Environmental Sciences
Hossein Mahdizadeh, Soroosh Sharifi
Summary: The study presents an extended Godunov-type wave propagation algorithm for modeling morphodynamic systems using both coupled and splitting approaches. The coupled method provides accurate predictions for all investigated flow regimes, while the splitting method is capable of modeling all flow regimes with a lower CFL number.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Ate Visser, Edward Kwicklis, Irene Farnham, Andrew F. B. Tompson, Ronald L. Hershey
Summary: This study analyzed groundwater samples from Pahute Mesa in Nevada, USA, using noble gases to infer groundwater recharge temperatures and provide evidence of groundwater flow patterns. The findings suggest that most recharge in the area occurred under cooler conditions than present, except near major drainages where ephemeral runoff still recharges shallow groundwater.
HYDROGEOLOGY JOURNAL
(2022)
Article
Management
Muyiwa Oyinlola, Patrick Schroder, Timothy Whitehead, Oluwaseun Kolade, Kutoma Wakunuma, Soroosh Sharifi, Barry Rawn, Victor Odumuyiwa, Selma Lendelvo, Geoff Brighty, Bosun Tijani, Tomi Jaiyeola, Lukonga Lindunda, Radhia Mtonga, Soroush Abolfathi
Summary: The paper examines the current condition of plastic value chains in Africa and explores how digital innovations can contribute to a circular plastic economy in the region. Research shows that various digital solutions, including web-based platforms, mobile apps, and 3D printing, are being employed by African entrepreneurs. Case studies reveal that multinational companies, particularly consumer brands, play a significant role in local plastic value chains as seed funders for start-ups and buyers of recycled plastics. Ongoing initiatives indicate positive progress in addressing the environmental and social impacts of plastic value chains in Africa. However, policy changes are needed to promote the growth of local start-ups, address regulatory barriers to digital solutions, establish markets for recycled plastic materials, and implement extended producer responsibility regulations.
AFRICA JOURNAL OF MANAGEMENT
(2022)
Article
Water Resources
Emilio Grande, Bhavna Arora, Ate Visser, Maya Montalvo, Anna Braswell, Erin Seybold, Corianne Tatariw, Kathryn Beheshti, Margaret Zimmer
Summary: Salt marshes play a crucial role in nutrient processing and are important for sensitive coastal environments. However, our understanding of the spatiotemporal variability of critical biogeochemical drivers in salt marshes is limited. This study highlights the importance of high-frequency in situ measurements, such as monitoring redox potential, in explaining the factors that govern subsurface biogeochemistry and hydrological processes in salt marshes.
HYDROLOGICAL PROCESSES
(2022)
Article
Engineering, Environmental
Wafaa Ali, Husna Takaijudin, S. R. M. Kutty, Arash Massoudieh
Summary: This study reports the results of nitrogen and phosphorus removal using modified bioretention systems. Sequencing these systems in a series maintained the continuity of nutrient removal. Durian peel is considered a promising material that can enhance the water quality in bioretention systems, outperforming coconut husk.
JOURNAL OF ECOLOGICAL ENGINEERING
(2022)
Article
Engineering, Marine
Amir Bordbar, Soroosh Sharifi, Zijian Guo, Hassan Hemida
Summary: This research aimed to investigate the flow behavior and evolution of local scour around two side-by-side piers using numerical methods. A hydro-morphodynamic model was developed and validated with experimental data. The results showed an inverse correlation between the spacing ratio of the piers and the scour hole depth.
Article
Engineering, Environmental
Khoa Nam Ngo, Patrexia Tampon, Tim Van Winckel, Arash Massoudieh, Belinda Sturm, Charles Bott, Bernhard Wett, Sudhir Murthy, Siegfried E. Vlaeminck, Christine DeBarbadillo, Haydee De Clippeleir
Summary: This study proposes a novel control approach using bioflocculation boundaries to enhance effluent quality and stability in high-rate activated sludge (HRAS) systems. The control strategy manipulates the wasting setpoint based on the oxygen uptake rate (OUR) ratio to overcome bioflocculation limitation and maintain effluent quality. Significant improvements in effluent quality, solids capture, and COD capture were achieved with this control approach.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Engineering, Environmental
Manal Osman, Husna Takaijudin, Arash Massoudieh, Hui Weng Goh
Summary: This study used Cascaded Bioretention to enhance nutrient removal from agricultural runoff. Increasing the number of treatments significantly improved nitrogen removal, while phosphorus removal was less sensitive to treatment frequency.
ENVIRONMENTAL ENGINEERING RESEARCH
(2023)
Article
Engineering, Civil
Amir Bordbar, Hassan Hemida, Soroosh Sharifi
Summary: In this study, the performances of two commonly used sand sliding techniques, namely, the artificial transport rate method (ATRM) and the geometry-based method (GBM), were evaluated in numerical modelling of scour around riverine and coastal structures. The results showed that modelling of the sand sliding procedure using ATRM required longer computational time, but had lower mass continuity error and was highly independent of the bed mesh structure compared to GBM. The sensitivity of the sand sliding methods coupled with a hydro-morphodynamic model to different bed mesh structures was also evaluated in modelling scour.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-MARITIME ENGINEERING
(2022)
Article
Engineering, Environmental
Benjamin U. Okoro, Soroosh Sharifi, Mike Jesson, John Bridgeman
Summary: This study evaluates the coagulation performance of kenaf protein fractions in different turbidity water. The results indicate that the globulin protein fraction is the most effective and pH-sensitive. It can be used as a primary coagulant and coagulant aid, resulting in high turbidity and solids removal.
WATER ENVIRONMENT RESEARCH
(2022)
Review
Green & Sustainable Science & Technology
Badir S. Alsaeed, Dexter V. L. Hunt, Soroosh Sharifi
Summary: This study conducts a systematic review of existing assessment frameworks for sustainable water resources management in arid and semi-arid regions. The results suggest that the current frameworks are not fully applicable in these regions, and highlight the need for developing a new bespoke framework.
Article
Water Resources
Mohammad Almadani, Christopher Nietch, Arash Massoudieh
Summary: This study aimed to evaluate the effectiveness of different stormwater control measures (SCMs) design scenarios on streamflow at the watershed scale. The results showed that at least a 50% retrofit of runoff from impervious areas would be needed to achieve similar predevelopment flows. Concentrating the SCMs in the lower portion of the watershed resulted in more effectively achieving the predevelopment exceedance curves than uniform SCM implementation.
JOURNAL OF SUSTAINABLE WATER IN THE BUILT ENVIRONMENT
(2023)
Article
Computer Science, Interdisciplinary Applications
Arash Massoudieh, Khiem Nguyen, Sudhir Murthy
Summary: Sub-disciplines within the water sector are divided into specialty domains, resulting in modeling tools for flow and water quality based on pre-determined equations. However, there is a need to integrate different sets of equations to address complex problems that involve interactions between multiple domains. This paper presents an extensible modeling framework that allows user-defined model components to be added using plugins, enabling adaptability to specific needs and objectives. The framework's data structure for describing model components, properties, and equations used for computation is also discussed. Four examples highlighting the multi-domain capability of the framework are provided.
ENVIRONMENTAL MODELLING & SOFTWARE
(2023)
Article
Water Resources
Emilio Grande, Erin C. Seybold, Corianne Tatariw, Ate Visser, Anna Braswell, Bhavna Arora, Francois Birgand, John Haskins, Margaret Zimmer
Summary: Salt marshes can remove terrestrial nutrients before they reach the coast. However, our understanding of the variability of reactive solutes and processes within salt marshes is limited. In this study, we monitored nitrate concentrations in salt marsh porewater at Elkhorn Slough in California, USA, using a high-frequency sampling system. We found that tidal and seasonal hydrologic fluxes control nitrate dynamics and export in coastal environments.
HYDROLOGICAL PROCESSES
(2023)
Article
Engineering, Multidisciplinary
Salwa Ramly, Wardah Tahir, Janmaizatulriah Jani, Soroosh Sharifi, Jazuri Abdullah
Summary: The aim of this research is to develop an integrated system for simulating future flood extents by coupling flood and urban growth models, to aid in better planning and management of cities in developing countries like Malaysia.
INTERNATIONAL JOURNAL OF INTEGRATED ENGINEERING
(2022)