Article
Environmental Sciences
Lauren Lynam, Thomas Piechota
Summary: The study evaluated future streamflow in California based on eight climate projection models and found that there may be more severe droughts in the future. Results showed that Warm Dry and Other simulations are projected to have larger droughts, while Average and Cool Wet simulations are projected to have fewer droughts.
Article
Environmental Sciences
Michelle E. Newcomer, Jennifer Underwood, Sheila F. Murphy, Craig Ulrich, Todd Schram, Stephen R. Maples, Jasquelin Pena, Erica R. Siirila-Woodburn, Marcus Trotta, Jay Jasperse, Donald Seymour, Susan S. Hubbard
Summary: This study investigates the impact of wildfires on hydrological changes in the Russian River Watershed in California and finds that the influence of wildfires ceases to increase beyond a certain threshold of burned area. Drought and climate conditions have a greater impact on streamflow variability compared to wildfires. This suggests that wildfire adaptation and drought factors in Mediterranean ecoregions buffer the hydrological response to fires.
WATER RESOURCES RESEARCH
(2023)
Review
Engineering, Civil
Dana A. Lapides, Bryan M. Maitland, Samuel C. Zipper, Alexander W. Latzka, Aaron Pruitt, Rachel Greve
Summary: Groundwater use can have significant impacts on streamflow and aquatic ecosystems, requiring integrated management strategies. This review evaluates the opportunities and challenges of applying the environmental flows approach to managing streamflow depletion, highlighting the importance of considering temperature and addressing tensions between existing groundwater withdrawal management and environmental flows approaches.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Huimin Wang, Songbai Song, Gengxi Zhang, Olusola O. Ayantobo, Tianli Guo
Summary: This study assesses the applicability of SV models to streamflow modeling in the Yellow River basin, and finds that SV models can better describe streamflow series with time-varying variance and accurately capture the occurrence of peak streamflow.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Civil
Ali Javed, Scott D. Hamshaw, Byung Suk Lee, Donna M. Rizzo
Summary: This study combines a multivariate event time series clustering approach with traditional 2-D hysteresis analysis to analyze river discharge and suspended sediment data during hydrological storm events, successfully identifying four common types of hydrological water quality events.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Civil
Georgia Papacharalampous, Hristos Tyralis, Yannis Markonis, Martin Hanel
Summary: In this study, a new methodological framework is proposed for exploring and comparing multi-scale analyses in a hydroclimatic context, in order to comprehensively understand the behaviors of geophysical processes and evaluate time series simulation models. By computing the feature values at different temporal resolutions and three hydroclimatic time series types, similarities and differences in the evolution patterns are identified. The computed features are also used for meaningful clustering of hydroclimatic time series, which allows for interpretation of hydroclimatic similarity at various temporal resolutions.
JOURNAL OF HYDROLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Andrew Bennett, Adi Stein, Yifan Cheng, Bart Nijssen, Marketa McGuire
Summary: This article introduces improved bias correction techniques for correcting systematic errors in streamflow predictions from hydrologic models. By considering river network topology and accounting for other processes, these techniques achieve spatial consistency and temporal consistency in the correction. The study found that these methods can reduce systematic bias in simulated streamflow and are suitable for input to water management models. Furthermore, conditioning on daily minimum temperature as a proxy for snowmelt processes can improve the timing of the corrected streamflow.
JOURNAL OF HYDROMETEOROLOGY
(2022)
Article
Environmental Sciences
Eric D. Stein, Julie Zimmerman, Sarah M. Yarnell, Bronwen Stanford, Belize Lane, Kristine T. Taniguchi-Quan, Alyssa Obester, Theodore E. Grantham, Robert A. Lusardi, Samuel Sandoval-Solis
Summary: The California Environmental Flows Framework (CEFF) is an example process for developing statewide environmental flow recommendations using a functional flows approach that focuses on protecting a broad suite of ecological functions. CEFF adopts a tiered approach to estimate ecological flow needs and considers non-ecological flow needs to produce a final set of environmental flow recommendations that balance all desired water uses. The inclusive development of CEFF involved technical experts, government agencies, stakeholders, and end-users, ensuring consensus on the technical foundations and commitment to the approach in the future.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Article
Multidisciplinary Sciences
Oleg Uzhga-Rebrov, Peter Grabusts
Summary: The goal of this article is to forecast migration flows in Latvia, particularly focusing on the asymmetric nature of emigration and immigration in the country. Fuzzy time series forecasting methods are employed to predict migration flows in Latvia, as statistical data on migration are often inaccurate. Three different methods are used and a comparative analysis of the results is provided. Generalized forecasts of the expected net migration flow in the future are presented.
Article
Engineering, Civil
Gerardo Castellanos-Osorio, Adrian Lopez-Ballesteros, Julio Perez-Sanchez, Javier Senent-Aparicio
Summary: The Water Framework Directive requires EU countries to ensure the ecological integrity of freshwater ecosystems. Generating daily flow data in highly water-regulated countries like Spain is challenging, but hydrological models can be used. This study evaluated different approaches for obtaining daily flows to estimate environmental flows in two river basins in Spain. The results showed that one approach outperformed the others in terms of statistical performance and accurately characterizing the natural regime and basic flow values.
JOURNAL OF HYDROLOGY
(2023)
Article
Water Resources
Laszlo Palcsu, Alena Gessert, Marianna Turi, Attila Kovacs, Istvan Futo, Judit Orsovszki, Anita Puskas-Preszner, Marjan Temovski, Gabriella Koltai
Summary: Our study focuses on three karst regions in Hungary and Slovakia, examining the response of discharging karst waters to recharge using environmental tracers. The results demonstrate the importance of sampling frequency in detecting short residence times and highlight the significance of long-term time series for better estimation of age distribution in karst water systems. The study findings suggest that shallow springs have short residence times, with H-3/He-3 and SF6 apparent ages confirming this to be between 0 and 10 years.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Geosciences, Multidisciplinary
Kun Zhang, Wasif Bin Mamoon, E. Schwartz, Anthony. J. J. Parolari
Summary: Monitoring water quality at high frequency is difficult and expensive. Compressed sensing (CS) can be used to reconstruct high-frequency water quality data using limited measurements, as water quality signals are often sparse in the frequency domain. In this study, the sparsity of stream flow and concentration time-series was investigated, and CS was tested for reconstruction. CS effectively reconstructed the signals with only 5%-10% of the measurements needed. The study also found that CS can be integrated with dimensionality reduction and optimization techniques for more efficient sampling schemes in environmental geosciences and engineering.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Mohammad Javad Zare Sakhvidi, Jun Yang, Danial Mohammadi, Hussein FallahZadeh, Amirhooshang Mehrparvar, Mark Stevenson, Xavier Basagana, Antonio Gasparrini, Payam Dadvand
Summary: Extreme temperatures can affect the risk of traffic crashes, particularly motorcycle crashes. Exposure to extremely cold and hot temperatures increases the risk of seeking medical attention for motorcycle crashes, especially within 0 to 3 days after exposure. The study estimates that approximately 11.01% of motorcycle crash medical attendances are attributable to non-optimal temperatures.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Civil
Frederic Satge, Benjamin Pillot, Henrique Roig, Marie-Paule Bonnet
Summary: This study investigates the reliability of available gridded P-datasets for streamflow simulations in the Juma watershed, Amazon region, and finds that IMERG-F v.6 and CMORPH-BLD are the most efficient P-datasets for the region under consideration.
JOURNAL OF HYDROLOGY
(2021)
Article
Engineering, Mechanical
Juanjuan Wang, Zishuo Yan, Lili Gui, Kun Xu, Yueheng Lan
Summary: Nonlinear dynamics is a rapidly developing field that studies the spatial and temporal evolution in various disciplines. This article presents a globally valid local approximation method for reconstructing the vector fields of nonlinear systems with unknown parameters or partial observations, based on the invariance of the system's evolution equation. The method demonstrates exceptional robustness and accuracy by considering the interference of noise with nonlinearity to the leading order.
NONLINEAR DYNAMICS
(2022)
Article
Geography, Physical
Belize Lane, Herve Guillon, Colin Byrne, Gregory B. Pasternack, Alan Kasprak, Samuel Sandoval-Solis
Summary: By analyzing a large morphological field dataset in California, USA, this study reveals the diversity of channel forms and their connections with landscape properties. The results demonstrate alignment of dominant channel attributes and landscape properties with established channel types, while also highlighting key differences.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Environmental Sciences
Alyssa N. Obester, Robert A. Lusardi, Nicholas R. Santos, Ryan A. Peek, Sarah M. Yarnell
Summary: In areas where populations of freshwater species are declining, rapid and cost-effective conservation management approaches are necessary. The umbrella species approach, applied to native fishes in California, has shown potential to address challenges in freshwater management, particularly related to instream flow strategies and species-specific information. This integrated approach uses expert opinion and readily available data to select suites of umbrella fish species over diverse spatial scales, providing a flexible and efficient tool for managers to make conservation decisions.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2022)
Article
Environmental Sciences
Sean M. Wineland, Hakan Basagaoglu, Jeri Fleming, Jack Friedman, Laura Garza-Diaz, Wayne Kellogg, Jennifer Koch, Belize A. Lane, Ali Mirchi, Luzma F. Nava, Thomas M. Neeson, J. Pablo Ortiz-Partida, Stephanie Paladino, Sophie Plassin, Grace Gomez-Quiroga, Ramon Saiz-Rodriguez, Samuel Sandoval-Solis, Kevin Wagner, Newakis Weber, James Winterle, Adrienne M. Wootten
Summary: Environmental flows are crucial for sustaining freshwater biodiversity and ecosystem services, but their widespread adoption is hindered by social, political, and economic barriers. In water-limited systems, there are strong trade-offs between human water needs and freshwater ecosystem protection, requiring collaborative solutions to address these challenges.
WILEY INTERDISCIPLINARY REVIEWS-WATER
(2022)
Article
Environmental Sciences
Sarah M. Yarnell, Ann Willis, Alyssa Obester, Ryan A. Peek, Robert A. Lusardi, Julie Zimmerman, Theodore E. Grantham, Eric D. Stein
Summary: Environmental flows, or the practice of allocating water in river systems for ecological purposes, is crucial for conserving aquatic species and improving river health. However, the consideration of surface-groundwater connectivity is often overlooked in environmental flow development. This study examines the relative contribution of groundwater inputs to streamflow and proposes the use of the California Environmental Flows Framework (CEFF) to assess ecological flow needs in groundwater-influenced streams. The findings highlight the importance of incorporating groundwater influences in environmental flow assessments and management strategies.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Engineering, Civil
Betsy Morgan, Belize Lane
Summary: Flow-ecology relationships are crucial for environmental flow management, but data limitations and incomplete understanding of spatial and temporal attributes lead to uncertainty. This study uses the South Fork Eel River watershed as a case study to demonstrate how data gaps and uncertainty in flow-ecology relationships can be better quantified.
JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT
(2022)
Article
Environmental Sciences
Theodore E. Grantham, Daren M. Carlisle, Jeanette Howard, Belize Lane, Robert Lusardi, Alyssa Obester, Samuel Sandoval-Solis, Bronwen Stanford, Eric D. Stein, Kristine T. Taniguchi-Quan, Sarah M. Yarnell, Julie K. H. Zimmerman
Summary: Environmental flows are crucial for the recovery and conservation of freshwater ecosystems. To enhance protections of environmental flows for streams in California, researchers developed a modeling approach that focuses on the functional components of natural flow regimes. By quantifying these components and predicting their values based on physical and climatic factors, it is possible to establish initial estimates of ecological flows that support critical ecosystem functions and protect ecosystem health. This modeling approach has proven effective in diverse landscape and climate contexts, offering a pathway for expanding environmental flow protections in California and beyond.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Anna Serra-Llobet, Sonja C. Jaehnig, Juergen Geist, G. Mathias Kondolf, Christian Damm, Mathias Scholz, Jay Lund, Jeff J. Opperman, Sarah M. Yarnell, Anitra Pawley, Eileen Shader, John Cain, Aude Zingraff-Hamed, Theodore E. Grantham, William Eisenstein, Rafael Schmitt
Summary: Conventional flood control measures often have adverse environmental consequences and are not easily adaptable to increased flooding. On the other hand, projects that reduce flood risk and restore ecosystems are both possible and cost-effective. However, the number of such projects remains small due to institutional and regulatory barriers.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Noelle K. Patterson, Belize A. Lane, Samuel Sandoval-Solis, Geeta G. Persad, J. Pablo Ortiz-Partida
Summary: Streamflow patterns are changing with climate change, posing risks to freshwater ecosystems. This study analyzed the ecological effects of changing streamflow patterns in snowmelt-dominated watersheds using a functional flows approach.
Article
Environmental Sciences
Ann D. Willis, David E. Rheinheimer, Sarah M. Yarnell, Gustavo Facincani Dourado, Anna M. Rallings, Joshua H. Viers
Summary: This study models alternative environmental flow strategies in the major tributaries to the San Joaquin River in California. Results show that these strategies have different impacts on downstream flow releases and hydropower production in different sub-basins. The functional flow and 40% full natural flow strategies increase water released to the river relative to baseline, but in different ways and with varying ecological benefits.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Alvaro Tena, Fanny Ville, Armengol Rene, Sarah M. Yarnell, Ramon J. Batalla, Damian Vericat
Summary: This study analyzed the hydropeaking patterns of the esera and Upper Cinca Rivers and found differences in both frequency and magnitude between the two rivers. The esera demonstrated a high-frequency, high-magnitude hydropeaking regime, while the Upper Cinca had a higher frequency but lower magnitude regime. The shape and magnitude of hydropeaks also varied between the rivers, with the Front Step shape dominating in the esera and the Rectangle shape being the most frequent in the Cinca. The study highlights the importance of considering the annual hydrology and river characteristics when assessing the impact of hydropeaking on river systems.
RIVER RESEARCH AND APPLICATIONS
(2023)
Article
Environmental Sciences
Sarah M. Yarnell, Martin Thoms
Summary: While water resource managers and river scientists recognize the interconnections among hydrology, river structure, biophysical processes, and ecological patterns, environmental flow management lacks sufficient attention to the ecological and geomorphological functionality of particular aspects of the flow regime.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Computer Science, Information Systems
Scott G. Burman, Jingya Gao, Gregory B. Pasternack, Nann A. Fangue, Paul Cadrett, Elizabeth Campbell, Dipak Ghosal
Summary: In the Chinook salmon restoration project in the lower Yuba River, a wireless sensor network was designed and deployed to monitor river temperatures. The network successfully collected temperature data for six months, despite inaccuracies in timestamping and flood-induced sensor destruction. The network's low power consumption and low-throughput capabilities proved crucial for ecological sampling.
ACM TRANSACTIONS ON SENSOR NETWORKS
(2023)
Article
Geography, Physical
Jason Wiener, Gregory Pasternack
Summary: The relative submergence of macroroughness elements plays a crucial role in the hydraulics and morphodynamics of steep, coarse-bedded rivers. Through hydrodynamic modeling and mapping of large bed elements (LBEs), this study presents complete distributions of LBE relative submergences at different spatial scales and explores their dynamics across different discharges. Statistical analysis reveals that segment- and reach-scale datasets exhibit similar properties and can be drawn from the same distribution type, indicating process-based similarity between spatial domains.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Ecology
Anzy Lee, Belize Lane, Gregory B. Pasternack
Summary: Geometric modelling was used to synthesize channel terrains and investigate the impact of bed roughness, thalweg elevation, and channel width on hydraulic and ecohydraulic conditions. Four distinct terrain models were developed and tested for different stream reaches, comparing hydraulic patterns and habitat availability.
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)