Article
Environmental Sciences
Ricky Kampen, Uwe Schneidewind, Christian Anibas, Andrea Bertagnoli, Daniele Tonina, Gerd Vandersteen, Charles Luce, Stefan Krause, Matthijs Berkel
Summary: This paper presents a new method, LPMLEn, that uses the frequency domain to estimate vertical flux and thermal diffusivity from streambed temperature time series. It utilizes multiple frequencies and sensors for parameter estimation, handles noise/uncertainty optimally, allows for estimation with both semi-infinite and bounded domain models, and compensates for temperature drifts known as transients. The capabilities of LPMLEn are demonstrated using synthetic and field data, showing the advantages of the bounded domain model over the semi-infinite domain model in parameter estimation.
WATER RESOURCES RESEARCH
(2022)
Article
Water Resources
Kristen E. E. Cognac, Michael J. J. Ronayne
Summary: This study investigated the temporal and spatial variability of streambed fluxes over a 3-year period, and its implications for seepage recharge and hyporheic exchange. The study found that streambed fluxes had high variability and could be categorized into sub-daily, daily, and interannual scales. The daily variability was strongly correlated with the median annual flux at individual sites.
HYDROLOGICAL PROCESSES
(2023)
Review
Environmental Sciences
M. Tripathi, P. K. Yadav, B. R. Chahar, P. Dietrich
Summary: "Quantification of groundwater and surface water interactions is crucial for effective water resource management. Research suggests that under certain conditions, aquifer properties can dominate exchanging flux."
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Oceanography
Hongyang Lin, Siyu Xu, Zhiyu Liu, Jianyu Hu, Fangtao Zhang, Zhiyong Cao
Summary: This study uses high-resolution, cross-frontal towed measurements to investigate temperature-salinity (T-S) compensation and its scale dependence in the Taiwan Strait. It is found that T-S compensation occurs within the interfacing zone, with temperature and salinity getting more (less) compensated at smaller scales in the S-dominated (T-dominated) frontal zone. The restratification-cooling mechanism, induced by submesoscale instabilities, explains the observed density compensating features on both flanks of the transition zone.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Review
Agronomy
Shima Amani, Hossein Shafizadeh-Moghadam
Summary: In the era of water scarcity and severe droughts, accurately estimating evapotranspiration (ET) is crucial for efficient water resource management and understanding hydrological and ecological processes. Combining remote sensing imagery and machine learning (ML) models provides a strong capability for ET estimation, which requires less data than traditional approaches. However, the increasing number of ML models and emerging satellite imagery presents both challenges and opportunities for researchers in this field.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Engineering, Civil
Adam Toth, Solt Kovacs, Jozsef Kovacs, Judit Madl-Szonyi
Summary: Springs are important sources of freshwater supply and provide valuable information about hydrogeological processes. Evaluating springs in the context of basin-scale groundwater flow systems can help understand their characteristics and stability. Monitoring physical parameters like discharge rate and water temperature can provide insights into the springs' classification and their relation to groundwater flow systems. Combining cluster and discriminant analysis methods can handle uneven data distribution and time-dependent variability of parameters.
JOURNAL OF HYDROLOGY
(2022)
Article
Plant Sciences
Mohanned Abdalla, Mutez Ali Ahmed, Gaochao Cai, Fabian Wankmuller, Nimrod Schwartz, Or Litig, Mathieu Javaux, Andrea Carminati
Summary: This study investigated the impact of below-ground hydraulics on stomatal regulation during soil drying, finding that changes in root system significantly affected the relationship between transpiration rate (E) and leaf xylem water pressure (psi(leaf-x)). Plants with shorter roots required larger gradients in soil water pressure to sustain the same transpiration rate, leading to earlier non-linearity and stomatal closure.
Article
Engineering, Civil
Lei Ju, Yutong Hou, Jiangjiang Zhang, Qiang Zheng, Hengnian Yan
Summary: This study introduces a new approach that combines convolutional neural networks with Bayesian data worth analysis for estimating streambed water fluxes. Results show that this method improves the accuracy of SWF estimation and provides a more accurate flux field estimation compared to traditional methods.
JOURNAL OF HYDROLOGY
(2022)
Review
Plant Sciences
Caitlin S. Byrt, Rose Y. Zhang, Isobel Magrath, Kai Xun Chan, Annamaria De Rosa, Samantha McGaughey
Summary: Maintenance of optimal leaf tissue humidity is vital for plant productivity and food security. The regulation of water and solute flux across plant cell membranes, influenced by aquaporin proteins, is crucial for achieving this optimal humidity. However, understanding the dynamics of aquaporin regulation and their influence on leaf cell solute flux and humidity remains challenging.
FRONTIERS IN PLANT SCIENCE
(2023)
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.
Article
Plant Sciences
Paula Guzman-Delgado, Emilio Laca, Maciej A. Zwieniecki
Summary: Plants are capable of absorbing water through their leaf surfaces, with stomata playing a crucial role in foliar water uptake. Stomata closure significantly affects the rehydration rate of leaves, emphasizing the importance of stomatal pathways for efficient water absorption in plants. Further research is needed to understand the underlying mechanisms and implications of foliar water uptake for plant productivity and survival.
PLANT CELL AND ENVIRONMENT
(2021)
Article
Environmental Sciences
V. F. Bense, T. Kruijssen, M. P. van der Ploeg, B. L. Kurylyk
Summary: Assessing aquitard hydraulic properties is difficult but critical for understanding recharge and discharge in aquifer systems. This study compares traditional methods for estimating hydraulic conductivity to new methods using numerical modeling, head monitoring, and heat source inference, showing that the latter yields accurate results efficiently.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Environmental
Camille Heylen, Ebenezer Annan, Kyle Monahan, Gabrielle String, Daniele Lantagne
Summary: Ceramic filters for household water treatment can improve water quality and reduce diarrheal disease. Hydraulic conductivities were compared between filters and disks, showing an increase with larger burn-out materials and higher firing temperatures. The study validates a method to predict full-scale filter hydraulic performance from hydraulic conductivity of disks, offering potential for simplified testing and improved filter quality.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Water Resources
Amyel Dale L. Cero, Christa A. Kelleher, Stephen B. Shaw
Summary: This study investigates the patterns of streambed upwelling and downwelling in Red Canyon Creek (RCC), Wyoming before and after the installation of Beaver dam analogues (BDAs). The results show that the stream reach was dominated by downwelling patterns, suggesting that RCC was a net losing stream during the summer. The installation of BDAs affected the vertical hydraulic gradient (VHG), with higher VHGs near the BDAs and diminished VHGs further away.
HYDROLOGICAL PROCESSES
(2023)
Article
Environmental Sciences
Enrico Bonanno, Guenter Bloeschl, Julian Klaus
Summary: Contradictory interpretations of transient storage modeling (TSM) results of past studies hinder the understanding of solute transport in streams. By conducting 30 instantaneous tracer experiments in Weierbach stream, Luxembourg, our study reveals that increasing discharge enhances parameters interaction, requiring more samples for identifiable results. Furthermore, we find that the influence of in-stream and hyporheic exchange processes on transient storage varies with different discharge levels. This research helps estimate TSM parameters accurately and enhances the understanding of the role of in-stream and hyporheic storage zones in transient storage.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Jiwook Jang, Jin-Yong Lee, Heejung Kim
Summary: The study conducted field surveys in a characteristic karst region of Samchoek, South Korea between 2017 and 2019, revealing that water quality in the area is significantly influenced by precipitation and that nitrate inflow comes from agricultural activities. Climate variations impact the relationships between different ions, and high precipitation rates during the rainy season result in active material exchange on the surface. These findings provide a scientific basis for studying water system connectivity and aiding sustainable management of water resources in complex karst hydrogeological regions.
Article
Green & Sustainable Science & Technology
Heejung Kim
Summary: Earthquakes can cause changes in underground water environments, impacting microbial communities. By studying the microbial structures in deep crustal fluids, earthquakes can potentially be predicted and earthquake risk assessment methods developed.
Article
Chemistry, Multidisciplinary
Han-Sun Ryu, Jinah Moon, Heejung Kim, Jin-Yong Lee
Summary: The study found that in order to effectively contain the environmental hazard of microplastics, it is necessary to reduce the diffusivity of microplastics and increase water flow velocity, porosity, and first-order attachment coefficient. Combining low diffusivity, fast water flow velocity, and high soil porosity may reduce the amount of microplastics leaked into groundwater environments. Modeling and simulations in this study provide a clear understanding of microplastics transport phenomena with applications in combating water pollution.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Cheolhong Kim, Naing Aung Khant, Yongmun Jeon, Heejung Kim, Chungwan Lim
Summary: The study analyzed the major and trace elements of Quaternary alkaline volcanic rocks on Jeju Island, revealing that these rocks were formed by the fractional crystallization of a single parent magma with slight continental crustal contamination. Two separate magmatic events occurred on Jeju Island, one associated with the subduction of the Pacific Plate and the other associated with intraplate magmatism.
APPLIED SCIENCES-BASEL
(2021)
Editorial Material
Green & Sustainable Science & Technology
Heejung Kim
Article
Engineering, Civil
Minha Lee, Heejung Kim, Jin-Yong Lee, Jae E. Yang, Chungwan Lim
Summary: There is growing evidence that climate change is causing the global meteorological cycle, which is vital for water security in most countries, to deviate from traditional patterns. In response, global efforts have focused on adopting integrated water resource management and adaptive management approaches. However, the specific implementation methods remain largely undefined. This study examines the case of South Korea, a country experiencing medium-high water stress due to climate change, and suggests that institutionalizing water resource management and adaptive management through the educational system can address the challenges faced in transitioning to a more sustainable water policy.
WATER RESOURCES MANAGEMENT
(2022)
Review
Environmental Sciences
Naing Aung Khant, Heejung Kim
Summary: This review examines the issue of microplastic contamination in groundwater systems, including its potential occurrences and sources. The most common types of plastic found in groundwater are polyethylene and polyethylene terephthalate, and fibers and fragments are the most commonly observed shapes. Microplastics in agricultural soils can impact groundwater aquifer systems, posing risks to both human consumption and the microorganisms in aquifers. Furthermore, this review highlights the connection between sustainable development goals and groundwater microplastic contamination, offering perspectives for future research.
Article
Green & Sustainable Science & Technology
Jinah Moon, Heejung Kim, Han-Sun Ryu
Summary: The water spider is the only spider known to live fully underwater. A study was conducted on its habitat in a wetland in South Korea, where the water level adjusts to groundwater due to drying. The water quality was found to be clean and non-polluted, with dissolved oxygen, temperature, and pH being the major environmental factors for the water spider's habitat. Dominant bacteria in the habitat were Proteobacteria, Actinobacteria, and Cyanobacteria.
Article
Chemistry, Multidisciplinary
Minha Lee, Heejung Kim
Summary: The world is facing increasing consequences of waste generation, with microplastics playing a significant role. The COVID-19 pandemic has led to a surge in microfiber waste due to the widespread use of personal protective equipment. This review examines the impact of the pandemic on microplastic production, consumption, and disposal, and suggests strategies for reducing environmental pollution.
Article
Environmental Sciences
Heejung Kim, Yong-Ha Park, Jae E. Yang, Hyuck-Soo Kim, Sung-Chul Kim, Eun-Ji Oh, Jinah Moon, Wonsil Cho, Wonsik Shin, Chaerim Yu
Summary: The search for biomarkers to assess soil health involves exploring organisms that can explain the core functions of soil and identifying species that play major roles in these functions. However, identifying specific keystone markers within the soil microbiota is challenging. This study used next-generation sequencing to analyze grassland surface soil and compare the genetic diversity of prokaryotic and eukaryotic microorganisms. The findings provide basic data for exploring biomarkers related to soil health.
Article
Chemistry, Multidisciplinary
Siwon Lee, Yong-Ju Jung, Jinah Moon, Jin-Young Lee, Heejung Kim, Jae-E Yang, Hyunji Lee, Jaewon Jung, Ha-Rang Kim
Summary: This study compares PCR methods for amplifying nitrogen cycle-related genes and analyzes and discusses nitrogen cycle-related genes from samples collected from different land use types and seasons. It finds that grassland could play an important role in soil nitrogen cycle.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Yong-Ju Jung, Naing Aung Khant, Heejung Kim, Sim Namkoong
Summary: Climate change has had a significant impact on the spread of waterborne diseases, particularly in ASEAN countries. The Philippines and Myanmar have experienced multiple tropical cyclones in recent years. Therefore, it is imperative for ASEAN countries to implement policies to adapt to climate change and protect their citizens from waterborne diseases.
Article
Education & Educational Research
Minha Lee, Jae-E Yang, Heejung Kim, Jinah Moon, Han-Sun Ryu, Jin-Yong Lee
Summary: The surge in demand for single-use plastics during the COVID-19 pandemic highlighted the limitations of top-down environmental policies in achieving sustainable consumption and waste management. However, "smart consumers" have the ability to make wise choices for sustainable development. A review of the South Korean environmental education curriculum suggests that its focus on the elementary level fails to enlighten the public on how to live sustainably. This study proposes that enhancing the effectiveness of environmental education can be achieved through incorporating guidance on living in harmony with the natural environment, enforcing environment-friendly culture-building activities, and regularly updating contents to include the latest Earth and environmental science knowledge.
ENVIRONMENTAL EDUCATION RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Hyori Ahn, Gi Chang Lee, Daekyo Cheong, Yong-Un Chae, Daewoo Kim, Keyup Kim, Heejung Kim, Seungwon Shin
Summary: This study investigated and studied the Baekuiri Formation in the Eundae-ri section of the Hantan River UNESCO Global Geopark on the border between North Korea and South Korea. It was found that the gravel layer mainly consists of schist, granite, and gneiss, with a smaller amount of tuff, quartz vein, and quartzite. The dating of the granite gravels revealed their ages to be approximately 111 Ma (Cretaceous), 171 Ma and 179 Ma (Jurassic), and 236 Ma (Triassic). The deposition period of the Baekuiri Formation is estimated to be approximately 0.5 Ma ago.
JOURNAL OF THE GEOLOGICAL SOCIETY OF KOREA
(2023)
Review
Education, Scientific Disciplines
Minha Lee, Heejung Kim, Han-Sun Ryu, Jinah Moon, Naing Aung Khant, Chaerim Yu, Ji-Hee Yu
Summary: This article provides an overview of the severity of plastic pollution, particularly microplastic pollution, emphasizing its detrimental effects on the environment and human health. It proposes the urgent need for international collective action and standardization of research to effectively manage and combat microplastic pollution on a global scale.
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)
