Article
Geosciences, Multidisciplinary
Len Zedel, Alex E. Hay, Gregory W. Wilson, Jenna Hare
Summary: Previous studies show that bottom velocity measurements from Doppler sonar systems can be used to rapidly sample bedload transport processes, but validation and understanding of the sampling mechanism are necessary before full utilization. Experimental results demonstrate agreement between MFDop measurements and measurements based on bedform migration rates and sediment traps in the SAFL flume.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2021)
Article
Environmental Sciences
D. N. Livsey, R. D. R. Turner, P. R. Grace
Summary: Optical and acoustic backscatter measurements are combined to quantify suspended-sediment concentration and particle size in suspensions dominated by muddy flocculated sediment. The sediment composition index (SCI) is used to predict the ratio of suspended-sediment concentration to acoustic backscatter under changes in particle size and density, and to estimate suspended-sediment concentration that is independent of changes in particle size and density. The SCI is found to be sensitive to changes in particle size and the estimates of particle bulk apparent density from SCI are biased by changes in particle size.
WATER RESOURCES RESEARCH
(2023)
Article
Environmental Sciences
Sagy Cohen, Jaia Syvitski, Thomas Ashely, Roderick Lammers, Balazs Fekete, Hong-Yi Li
Summary: Bedload is difficult to measure and model, and its dynamics in most fluvial systems worldwide remain unknown. This study presents a global scale bedload flux model that predicts the distribution of water discharge, suspended sediment, and bedload, and analyzes the sensitivity of bedload predictions to various factors. The results show that river discharge and slope are the key drivers of bedload trends.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Civil
Cong Xiao, Xiao-Hua Zhu, Chuanzheng Zhang, Ze-Nan Zhu, Yun Long Ma, Ji Wen Zhong, Li Xin Wei
Summary: This study successfully estimated the cross-section averaged suspended sediment concentration (SSC) and suspended sediment discharge (SSD) in the Yangtze River using Coastal Acoustic Tomography (CAT). The results showed that SSD was primarily driven by water discharge, with values ranging from 204 kg/s during the dry season to a maximum of 36,299 kg/s during flood events. This method offers the advantage of continuous real-time monitoring of transect river flow, SSC, and SSD.
JOURNAL OF HYDROLOGY
(2023)
Article
Oceanography
Andrew W. M. Pomeroy, Curt D. Storlazzi, Kurt J. Rosenberger, Ryan J. Lowe, Jeff E. Hansen, Mark L. Buckley
Summary: In reef-lagoon systems, suspended sediment is primarily transported close to the seabed and influenced by wave frequencies. Mean currents are the main transport mechanism, contributing significantly more suspended-sediment flux than sea-swell and infragravity waves.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Engineering, Civil
Feifei Wang, Wenxin Huai, Yakun Guo
Summary: In this study, an analytical model is established to investigate the vertical profile of suspended sediment concentration in ice-covered alluvial channels with steady uniform flows. The proposed model is validated using experimental data and evaluated for its predictive accuracy compared to previous model results. Results show that the relative concentration of suspended sediment decreases with increasing ice cover roughness and sediment fall velocity, and the uniformity of concentration distribution is closely related to the proportionality parameter sigma.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Andrew J. Moodie, Jeffrey A. Nittrouer, Hongbo Ma, Brandee N. Carlson, Yuanjian Wang, Michael P. Lamb, Gary Parker
Summary: This study demonstrates that sediment concentration may influence the magnitude and pattern of vertical density stratification through sampling and measurement under different flow conditions in the lower reach of the Yellow River. The importance lies in the understanding of the vertical density stratification phenomenon in natural river flows, which can improve sediment transport models and provide guidance for ecological environmental management and flood protection measures in rivers.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Yuan Xu, Heidi Nepf
Summary: The study found that the morphology of real plants can affect the vertical distribution of suspended sediment, thus altering the classic model for sediment concentration in river beds. The dense part of Typha latifolia leaves had a relatively uniform suspended sediment concentration, while the upper region with dispersed leaves had decreasing concentration with height.
WATER RESOURCES RESEARCH
(2021)
Article
Oceanography
Gaibo Zhao, Wensheng Jiang, Tao Wang, Shuguo Chen, Changwei Bian
Summary: The Bohai Sea has experienced a significant decrease in sea surface suspended sediment concentration (SSSC) in the past two decades, with spatial variations and seasonal differences. The reduction in wind speed has played the most important role in the SSSC decrease, while the variation in runoff and sediment discharge of the Yellow River is not relevant to the spatiotemporal variation of SSSC.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Geosciences, Multidisciplinary
Chien-Yung Tseng, Rafael O. Tinoco
Summary: A two-layer, turbulence-based model was developed to predict suspended sediment concentration profiles in emergent vegetated flows. The model takes into account turbulence generated from vegetation, bed, and coherent structures caused by stem-bed-flow interaction to calculate the effective bed shear velocity.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Multidisciplinary Sciences
Basil Gomez, Philip J. Soar
Summary: This passage discusses the variability of bedload transport and the correlation between the transport rate and stream power. The authors propose a simple mathematical expression to describe the efficiency of bedload transport and acknowledge the different transport patterns that can occur under similar hydraulic conditions. They suggest that efforts in the field should focus on characterizing the sizes available on the bed between floods.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Environmental Sciences
Xiaoyun Zhan, Jun Zhao, Xia Zhu-Barker, Junfeng Shui, Baoyuan Liu, Minghang Guo
Summary: This study presented an automated technique for characterizing surface flow in situ fields, providing high repeatability and accuracy in obtaining satisfactory results in field experiments. Experimental results showed that vegetated areas had a significant impact on reducing soil loss.
WATER RESOURCES RESEARCH
(2021)
Article
Engineering, Civil
Laxmipriya Mohanty, Prashant Istalkar, Basudev Biswal
Summary: Understanding and modeling the dynamics of suspended sediment concentration (C) in river channels is crucial. The sediment rating curve that relates C with river discharge (Q) is a widely used approach due to its simplicity and effectiveness. However, the relationship between C and Q is not unique and changes over time. This study analyzes recession periods and proposes a model that can predict future suspended sediment concentration based on past data. The results emphasize the importance of recognizing the dynamic nature of the C-Q relationship.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Patricio A. Moreno-Casas, Juan Pablo Toro, Sebastian Sepulveda, Jose Antonio Abell, Eduardo Gonzalez, Joongcheol Paik
Summary: This paper presents a simulation of a Lagrangian particle tracking model that analyzes the motion of saltating sediment particles. The study focuses on the effect of particle concentrations and flow intensities on jump statistics and particle diffusion. The results show that particle concentration affects diffusion coefficients, and collision among particles plays a significant role in particle diffusion.
Article
Engineering, Civil
Slaven Conevski, Massimo Guerrero, Colin D. Rennie, Nils Ruther
Summary: The study demonstrated that acoustic Doppler current profilers can assist in the assessment of bedload material. The results showed that the 2 MHz ADCP underestimated particle velocity, while the backscattering strength of the M9 device was negatively correlated with bedload concentration, suggesting potential for a methodology based solely on acoustic outputs for bedload quantification.
JOURNAL OF HYDRAULIC RESEARCH
(2021)
Article
Environmental Sciences
B. Camenen, N. Gratiot, J-A Cohard, F. Gard, V. Q. Tran, A-T Nguyen, G. Dramais, T. van Emmerik, J. Nemery
Summary: The hydrological dynamics of the Saigon River is influenced by a variety of factors, with this study proposing a low-cost method for estimating river discharge. Seasonal behaviors were observed in both water level and water discharge, with rainfall having little impact on them. Evidence of interactions between precipitation and coastal waters was found.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Multidisciplinary Sciences
Paty Nakhle, Olivier Ribolzi, Laurie Boithias, Sayaphet Rattanavong, Yves Auda, Saysongkham Sayavong, Rosalie Zimmermann, Bounsamay Soulileuth, Anne Pando, Chanthamousone Thammahacksa, Emma J. Rochelle-Newall, William Santini, Jean-Michel Martinez, Nicolas Gratiot, Alain Pierret
Summary: In the Mekong basin, over 70 million people rely on unimproved surface water for domestic use, which is often contaminated with fecal matter. Fecal contamination is found to be most severe during the rainy season, especially in forested and mountainous regions.
SCIENTIFIC REPORTS
(2021)
Article
Ecology
Juan Pinos, Jerome Latron, Delphis F. Levia, Pilar Llorens
Summary: This study focuses on the spatial variability of stemflow on the bole of trees, providing quantitative data on the drivers of circumferential variation of stemflow. Biotic factors such as trunk lean, bark morphology, and tree neighborhood were found to have a greater influence on stemflow distribution than abiotic factors like rainfall intensity peaks. Non-uniform stemflow distribution around tree stems were observed, highlighting the need for further research on stemflow dynamics across tree species and vegetative surfaces.
Article
Environmental Sciences
An Truong Nguyen, Thanh-Son Dao, Emilie Strady, Tuyet T. N. Nguyen, Joanne Aime, Nicolas Gratiot, Julien Nemery
Summary: The study analyzed the spatiotemporal variation of phytoplankton and their relationship with environmental variables in the Saigon River in Southern Vietnam. It was found that phytoplankton abundance was significantly higher in the dry season compared to the rainy season, and urban emissions from Ho Chi Minh City caused a clear separation in phytoplankton abundance between the urban area and the rest of the river.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Ecology
Pilar Llorens, Jerome Latron, Darryl E. Carlyle-Moses, Kerstin Nathe, Jeffrey L. Chang, Kazuki Nanko, Shin'ichi Iida, Delphis F. Levia
Summary: This study aimed to measure the stemflow infiltration areas of high stemflow-producing American beech trees, revealing that these areas are typically small, indicating that stemflow is an extremely localized input in natural forests.
Article
Environmental Sciences
Nico Hachgenei, Guillaume Nord, Lorenzo Spadini, Henri Mora, Francois Courvoisier, Jean-Francois Sutra, Jean-Pierre Vandervaere, Cedric Legout, Marie-Christine Morel, Jean Martins, Anne Lespine, Celine Duwig
Summary: Many contaminants of agricultural origin are released into rural environments, particularly at the soil surface. However, there is limited knowledge about their fate and transfer within and between environmental compartments. Therefore, a device and protocol for sampling intact soil monoliths without heavy machinery has been proposed to investigate the transfer of trace organic contaminants through topsoils.
VADOSE ZONE JOURNAL
(2022)
Article
Water Resources
Juan Pinos, Pilar Llorens, Jerome Latron
Summary: Vegetation plays a crucial role in the isotopic fractionation of rainwater. This study monitored and sampled rainfall, throughfall, and stemflow in a Scots pine forest under Mediterranean conditions for 20 months. The results showed that throughfall was usually more enriched than rainfall, and stemflow was more enriched than throughfall. At the intra-storm scale, stemflow was initially more enriched, but decreased towards the end.
HYDROLOGICAL PROCESSES
(2022)
Article
Engineering, Civil
Juan P. Martin-Vide, Cristina M. S. Fael, Francisco Nunez-Gonzalez, Carles Ferrer-Boix, Cesar A. V. Santos, Arnau Prats-Punti, Victor Chavarrias
Summary: This study investigates the effects of large piers on river morphology and fluvial processes during floods using scale model experiments and a case study. The results show that the large piers cause an imbalance in the spanwise bedload distribution, leading to changes in the river bed. Thus, it is important to consider the effects of large piers on river morphology during the bridge planning phase.
JOURNAL OF HYDRAULIC ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Ron Nativ, Jens M. Turowski, Liran Goren, Jonathan B. Laronne, J. Bruce H. Shyu
Summary: Large boulders have significant effects on channel morphology, but the understanding of these effects is limited. The channel morphology adjusts according to the concentration of boulders, but the adjustment time scale varies with slope and width.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2022)
Article
Engineering, Civil
Suresh Kumar Thappeta, Joel P. L. Johnson, Eran Halfi, Yael Storz Peretz, Jonathan B. Laronne
Summary: Calculating hydraulic parameters, such as bed shear stress, for flash floods is challenging due to the lack of comprehensive and accurate flow data. Laboratory experiments were conducted to empirically evaluate different methods for predicting shear stresses in rapidly changing hydrographs. The results showed that simpler methods, although not strictly applicable to rapid changes, can still provide meaningful shear stress constraints in the absence of complete flow data. Additionally, it was found that bores propagating over shallow flowing water resulted in lower bed shear stresses compared to those propagating over a dry bed.
JOURNAL OF HYDRAULIC ENGINEERING
(2023)
Article
Environmental Sciences
Eran Halfi, Suresh K. Thappeta, Joel P. L. Johnson, Ian Reid, Jonathan B. Laronne
Summary: Evidence of the effect of unsteady flow on bedload sediment transport is lacking in desert rivers. Our study in Nahal Eshtemoa, Israel, shows that flood bores can transport bedload and the transport ceases after the arrival of the bore, even though water depth continues to rise.
WATER RESOURCES RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Juan Pinos, Markus Flury, Jerome Latron, Pilar Llorens
Summary: Stemflow, which is the flow of water down the stem or trunk of a plant, can redistribute soil moisture in forest environments. In this study, artificial tracers were used to observe and measure the preferential flow of stemflow in the soil. The results showed that stemflow infiltrated primarily along the surface of roots and through macropores, impacting soil moisture distribution and groundwater recharge.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Matthias Sprenger, Pilar Llorens, Francesc Gallart, Paolo Benettin, Scott T. Allen, Jerome Latron
Summary: This study investigates the partitioning of precipitation in the Can Vila catchment using stable isotopes, and quantifies the dynamics of water evapotranspiration and streamflow. The results show that the multi-objective calibration approach can accurately simulate the isotope ratios of both stream water and xylem water. The findings support recent ecohydrological studies that highlight the heterogeneity of water storage and fluxes, as well as the use of relatively old water by trees.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2022)
Article
Environmental Studies
Rachel Armoza-Zvuloni, Yanai Shlomi, Itay Abadi, Rachamim Shem-Tov, Jonathan B. Laronne
Summary: This study quantified sediment yield from the Nahal Nehushtan watershed in southern Israel, showing an average specific sediment yield of 29.8 t km(-2) year(-1), one of the lowest among studied warm deserts. The thickest layer of sediment, deposited by a single short rain event, contributed 31% of the total sediment yield.
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)