Article
Environmental Sciences
Xiaolong Geng, Holly A. Michael
Summary: The study highlights the significant role of three-dimensional groundwater movement in heterogeneous coastal aquifers, especially in systems with connected high-permeability geological features. Three-dimensional flowpaths and travel times are longer compared to two-dimensional in onshore areas, but shorter offshore, particularly in conduit-type models with highly preferential flow. Flowpath lengths and travel times vary greatly in three-dimensional simulations compared to two-dimensional across all heterogeneous systems.
WATER RESOURCES RESEARCH
(2021)
Article
Food Science & Technology
Zhongmin Huang, Yangyang Huang, Zijie Dong, Peng Guan, Xiaojie Wang, Shuli Wang, Mengmeng Lei, Biao Suo
Summary: When using predictive models to assess the risk posed by foodborne pathogens, it is important to consider strain heterogeneity, as certain strains exhibit resistance at low temperatures. This study investigated the growth dynamics of two Staphylococcus aureus strains in glutinous rice dough at different temperatures. The results showed significant differences in the maximum specific growth and duration of the lag phase between the cold-tolerant and sensitive strains. The findings suggest that predictive models should incorporate cold-tolerant strains for accurate risk assessment of foodborne pathogens.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Water Resources
Mahdieh Dibaj, Akbar A. Javadi, Mohammad Akrami, Kai-Yuan Ke, Raziyeh Farmani, Yih-Chi Tan, Albert S. Chen
Summary: A coupled framework linking subsurface flow and surface hydrodynamics was developed and applied to a real-world case study of the Pingtung coastal aquifer in Taiwan. The study revealed significant differences in rainfall ratio between wet and dry seasons in the region, with southern Taiwan experiencing the largest sea and river interaction.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Thermodynamics
Lijun Zhou, Xihua Zhou, Chaojun Fan, Gang Bai, Lei Yang, Yiqi Wang
Summary: Flue gas (CO2/N2) injection into coal seam achieves reduction of greenhouse gas emission and enhancement of methane recovery. An improved heat-solid-fluid coupling model is proposed to simulate the interaction between solid deformation, fluid transport, heat conservation, and porosity/permeability. Results show that the proposed model accurately represents the complex interactions and prevents the sharp reduction of permeability caused by pure CO2 injection. The effective extraction zone of flue gas injection expands faster than primary and CO2 promoted extraction, with influencing factors including initial permeability, injection pressure, N2 and CO2 adsorption strain ratio, injection temperature, and thermal expansion coefficient.
Article
Geochemistry & Geophysics
J. Michael Martin, Mark E. Everett, Peter S. K. Knappett, Ryan C. Ewing
Summary: Preferential flow between rivers and aquifers in alluvial floodplains plays a key role in shallow groundwater transport, which is crucial for modeling and managing groundwater resources. A sand-dominated structure was observed in a clay wedge separating streamflow and bank storage from an adjacent shallow aquifer. Time-lapse electrical resistivity tomography revealed dynamic changes in electrical resistivity, indicating the presence of preferential flow. This research demonstrates that sand conduits can transport water between the floodplain, river, and shallow aquifer, influencing the regulation and distribution of water, sediments, and contaminants.
NEAR SURFACE GEOPHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Caroline De Paoli, Thierry Duren, Estelle Petitclerc, Mathieu Agniel, Alain Dassargues
Summary: This study evaluates the influences of three ATES systems in two different aquifers in the center of Brussels using numerical simulations. The model is built with Feflow software and simulates groundwater flow and heat transport based on available data. The results show how the thermal imbalance of one system affects the efficiency of the three systems, even if one system is located in a deeper aquifer.
APPLIED SCIENCES-BASEL
(2023)
Article
Multidisciplinary Sciences
Yuanzhi Li, Margaret M. Mayfield, Bin Wang, Junli Xiao, Kamil Kral, David Janik, Jan Holik, Chengjin Chu
Summary: The study highlights the importance of higher-order interactions (HOIs) in influencing tree performance in a temperate forest, specifically in mitigating the competitive direct effects of neighbors on focal trees. This provides a foundation for future investigations into the prevalence and relative importance of HOIs in global forests and their impact on species diversity.
NATIONAL SCIENCE REVIEW
(2021)
Article
Energy & Fuels
Jose Antonio Velez Godino, Miguel Torres Garcia, Francisco Jose Jimenez-Espadafor Aguilar
Summary: This study assesses the thermal performance and emissions of diesel/biodiesel blends under low-temperature combustion (LTC) through experimental analysis. A predictive model is developed based on the experimental data to accurately predict the LTC of diesel/biodiesel blends.
Article
Environmental Sciences
Gert Ghysels, Christian Anibas, Henock Awol, Abebe Debele Tolche, Uwe Schneidewind, Marijke Huysmans
Summary: Riverbed temperature profiles are commonly used in estimating vertical river-aquifer exchange fluxes, with often assumed vertical flow. However, riverbeds are heterogeneous and may have non-vertical flows, leading to different flux estimates. A study on the Aa River in Belgium shows that 3D groundwater models estimate higher exchange fluxes than 1D solutions due to non-vertical flows near riverbanks.
Review
Geosciences, Multidisciplinary
Xiaofan Yang, Jinhua Hu, Rui Ma, Ziyong Sun
Summary: Groundwater-surface water interaction in cold regions is highly sensitive to seasonal and climate changes, with integrated hydrologic models being essential for simulating complex processes and studying system behaviors under snow cover variations, freeze-thaw cycles in frozen soils and GW-SW interactions. Benchmarking and integration with scarce field observations are critical in developing physically representative cold region integrated hydrologic models.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Energy & Fuels
Hafizh Zakyan, Asep Kurnia Permadi, Egi Adrian Pratama, Muhammad Arif Naufaliansyah
Summary: Low salinity water injection (LSWI) is an emerging method to improve waterflood performance. This study proposes an improved method of clay-induced rock typing for field-scale reservoir simulation and discusses its application in LSWI modeling.
Article
Oncology
Yiqing Shen, Xiaohu Zheng, Yeben Qian, Mantian Liu, Zhigang Nian, Quanwei Cui, Yonggang Zhou, Binqing Fu, Rui Sun, Zhigang Tian, Haiming Wei
Summary: This study identified four driver genes (TP53, PTEN, CTNNB1, and KRAS) with high frequency of somatic mutations or copy number variations (CNVs) in HCC patients, and constructed four different spontaneous HCC mouse models to screen for changes in various kinase signaling pathways. The downstream signaling pathway landscapes associated with genomic alterations were identical in HCC patients with the same molecular classification as the mouse models, providing novel targeted therapeutic options for the clinical treatment of HCC.
Article
Engineering, Aerospace
A. Broatch, M. Carreres, J. Garcia-Tiscar, M. Belmar-Gil
Summary: The main challenge for next-generation aeronautical gas turbine engines is to increase efficiency and reduce emissions. New injection-combustion strategies, such as Lean Direct Injection, are being developed to reduce NOx. Studying liquid fuel injection and interaction with air through numerical approaches can provide a detailed understanding of engine efficiency and emissions.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Thermodynamics
Stefan Frommater, Jens Neumann, Christian Hasse
Summary: A phenomenological modelling framework is proposed to simulate engine-out particle emissions of direct-injection gasoline engines based on physical principles. The framework incorporates a multi-zone model with gas-phase reaction kinetics and a stochastic reactor model considering soot formation dynamics, fed by inputs from an engine process simulation. The model accounts for injector deposits, inhomogeneous gaseous mixture preparation, and pyrolysis reactions in different zones.
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2021)
Article
Engineering, Ocean
Gaetano Porcile, Michele Bolla Pittaluga, Alessandro Frascati, Octavio E. Sequeiros
Summary: Tropical cyclones trigger turbidity currents in submarine canyons through storm surges, high waves, onshore blowing winds and extreme currents. The supply of sediment at the canyon heads is crucial for the occurrence of turbidity currents, and their frequency and duration.
APPLIED OCEAN RESEARCH
(2023)
Article
Environmental Sciences
Maximilian Ramgraber, Robin Weatherl, Frank Blumensaat, Mario Schirmer
Summary: The sustainable management of groundwater relies on accurate characterization of the subsurface using numerical models. However, ensuring the uniqueness of the model poses a challenge due to computational limitations that force modelers to rely on Gaussianity-based methods.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Andrea Betterle, Anna Jaeger, Malte Posselt, Claudia Coll, Jonathan P. Benskin, Mario Schirmer
Summary: The study shows that bedforms have a significant impact on hyporheic exchange paths, while average surface flowrates mainly affect hyporheic retention times. In the experiments, sediments with higher bacterial diversities significantly reduce hyporheic fluxes.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Environmental Sciences
S. Pool, F. Frances, A. Garcia-Prats, M. Pulido-Velazquez, C. Sanchis-Ibor, M. Schirmer, H. Yang, J. Jimenez-Martinez
Summary: The study assessed the impact of climate change on irrigation regimes in the Mediterranean region of Valencia, Spain. Significant changes in groundwater recharge and actual evapotranspiration were projected, posing challenges for future water management in a region where water resources are fully allocated. The study also highlighted the importance of considering both climate change and irrigation techniques when planning for water resources in irrigated Mediterranean agriculture.
Article
Green & Sustainable Science & Technology
Janine Koehn, Ralph Meissner, Holger Rupp, Frido Reinstorf
Summary: This paper introduces developed practical tools for estimating rainfall and runoff erosivity, considering the effects of land use changes and climate change impacts, and tests them in mountainous areas in Central Germany.
CLEAN-SOIL AIR WATER
(2022)
Article
Geosciences, Multidisciplinary
Robin K. Weatherl, Maria J. Henao Salgado, Maximilian Ramgraber, Christian Moeck, Mario Schirmer
Summary: This study explores the relationship between surface runoff and groundwater recharge in urban areas using a top-down water balance approach, and two empirical models were used to estimate runoff. The differences between the resulting runoff estimates highlight the complexity of the rainfall-runoff relationship, emphasizing the importance of understanding soil-moisture dynamics and their control on hydro(geo)logical responses. The estimated groundwater recharge is found to be approximately 40-45% of annual precipitation, similar to results from Swiss catchments of similar characteristics.
HYDROGEOLOGY JOURNAL
(2021)
Article
Water Resources
Marcus Beylich, Uwe Haberlandt, Frido Reinstorf
Summary: This study investigates the underestimation of absolute floods by daily hydrological models in smaller catchments and suggests that relative change signals of floods are more accurate for future flood peak predictions. Comparing daily and hourly model sets, it was found that the daily modeling process often leads to underestimations, while differences in relative flood changes were not significant between the two model sets. To improve climate studies with coarse modeling time steps, using relative change signals instead of absolute values is recommended.
HYDROLOGY RESEARCH
(2021)
Article
Environmental Sciences
Maximilian Ramgraber, Mario Schirmer
Summary: Uncertainty estimation is crucial in practical hydrogeology, especially in data-scarce settings. Numerical modeling frameworks can handle subsurface complexity and associated uncertainties, but may have limitations in dealing with boundary uncertainties. The analytic element method (AEM) serves as an efficient and economical alternative for uncertainty estimation, particularly in exploratory research.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Sandra Pool, Felix Frances, Alberto Garcia-Prats, Cristina Puertes, Manuel Pulido-Velazquez, Carles Sanchis-Ibor, Mario Schirmer, Hong Yang, Joaquin Jimenez-Martinez
Summary: The study developed a distributed hydrological modeling approach to investigate the spatiotemporal effect of flood and drip irrigation on groundwater recharge. The results suggest that in the study area's hydroclimatic conditions, annual recharge is strongly related to annual rainfall, with flood-irrigated recharge tending to exceed drip-irrigated recharge by 10% at annual time scales, and recharge response to a particular precipitation event is smaller in flood irrigation than in drip irrigation.
WATER RESOURCES RESEARCH
(2021)
Article
Water Resources
Gerrit Laube, Christian Schmidt, Jan H. Fleckenstein
Summary: This study explored the relationship between nutrient turnover rates in the hyporheic zone and flow dynamics, finding that aerobic and anaerobic turnover rates are influenced differently by conductivity. Additionally, conductivity heterogeneity was shown to decrease nutrient turnover rates in both aerobic and anaerobic reactions.
ADVANCES IN WATER RESOURCES
(2022)
Article
Green & Sustainable Science & Technology
Siti Lieyana Azffri, Azimatul Azaman, Rahayu Sukmaria Sukri, Salwana Md Jaafar, Md Faizan Ibrahim, Mario Schirmer, Stefan Herwig Goedeke
Summary: Brunei has made significant progress in agricultural development, but crop production, especially rice, is still insufficient due to water scarcity, acidic soils, and environmental deterioration. This study investigated the soil and groundwater conditions at three rice cultivation sites in Brunei. The results showed potential aquifer zones and shallower groundwater levels in irrigated sites. The groundwater and soil properties indicated high alkalinity, mineralization, and salt ion leaching. Future irrigation activities should consider local aquifer characteristics, groundwater flow paths, and nutrient transport to ensure sustainable development in agricultural areas.
Article
Environmental Sciences
Stefan Herwig Godeke, Haziq Jamil, Mario Schirmer, Anja Bretzler, Norazanita Shamsuddin, Nur Hakimah Mansor
Summary: The aim of this research was to analyze the impact of raising the dam height on the water quality of a tropical reservoir in South East Asia. The results showed that the increase in water level led to an increase in iron and manganese concentrations due to the establishment of reducing conditions. The change in water quality was also accompanied by a change in pH values.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Environmental Sciences
Christian Moeck, Markus Merk, Dirk Radny, Adrian Auckenthaler, Mario Schirmer, Thomas Gabriel
Summary: Ensuring sustainable water supply in urban areas is a major challenge, with artificial groundwater recharge holding potential to address the issue. Accurately describing the spatial and temporal distribution of groundwater recharge is crucial for improving groundwater monitoring efficiency.
Article
Environmental Sciences
Sandra Pool, Felix Frances, Alberto Garcia-Prats, Cristina Puertes, Manuel Pulido-Velazquez, Carles Sanchis-Ibor, Mario Schirmer, Hong Yang, Joaquin Jimenez-Martinez
Summary: Agriculture in the Mediterranean climate faces challenges in terms of water demand and fertilizer losses. This study explores the performance of different irrigation-fertilizer practices in Valencia, Spain, over a fifty-year period. The results show the variability in groundwater recharge and nitrogen leaching, as well as the impact of precipitation on the long-term performance of irrigation practices. The findings can guide the development of sustainable water management strategies in Mediterranean agricultural areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Siti Lieyana Azffri, Chua Siaw Thong, Lim Lee Hoon, Md Faizan Ibrahim, Mario Schirmer, Stefan Herwig Godeke
Summary: This study investigates the hydrochemical characteristics of water resources in Brunei Darussalam and evaluates their suitability for irrigation use. The results show that most of the water samples in Brunei are suitable for agricultural irrigation. However, there are a few samples that require additional treatment and testing.
Article
Engineering, Civil
Raoul A. Collenteur, Christian Moeck, Mario Schirmer, Steffen Birk
Summary: The study assessed the applicability and performance of lumped-parameter models using impulse response functions to simulate hydraulic head data from the nationwide groundwater monitoring network in Switzerland. The results show that precipitation and evaporation are the main factors controlling the groundwater dynamics.
JOURNAL OF HYDROLOGY
(2023)
