Article
Oceanography
J. W. Kim, J. I. Song, B. I. Yoon, S. -B. Woo
Summary: Field observations were conducted to investigate the discharge effects on the residual current at bifurcated channels in the Yeongsan River estuary. The study found that irregular freshwater discharge led to a multi-layer vertical structure, unlike the typical two-layer vertical structure. The flow patterns during non-discharge were dominated by tidal dynamics in the sub-channel, while during freshwater discharge, the main channel experienced near-surface strong velocity. Nonlinear effects occurred at the bifurcation point, with the advection term dominant during non-discharge and the vertical friction term dominant during discharge.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Marine & Freshwater Biology
Yuan-Guang Huang, Hai-Fei Yang, Jian-Jun Jia, Peng Li, Wen-Xiang Zhang, Ya Ping Wang, Yi-Fan Ding, Zhi-Jun Dai, Ben-Wei Shi, Shi-Lun Yang
Summary: This study investigates the variations in suspended sediment concentrations and their impacts on the coastal areas in the Yangtze River Estuary and adjacent sea. The results show that the sediment concentrations have decreased due to dam constructions and soil conservation measures. However, the resuspension of sediments by tides and waves mitigates the decrease caused by fluvial sediment discharge. The decline in suspended sediment concentrations may affect the growth of phytoplankton, as evidenced by the increase in chlorophyll a concentration and algal blooms.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Junbiao Tu, Daidu Fan, Zhiyu Liu, William Smyth
Summary: This study obtained estimates of the flux Richardson number R-f in a strongly turbulent, sediment-stratified estuarine flow. The parameterization based on the turbulent Froude number Fr-t was found to be the most effective.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Engineering, Marine
Ryan J. K. Dunn, Jordan Glen, Hsin-Hui Lin, Sasha Zigic
Summary: The study examines the dynamics of suspended particulate matter (SPM) in Port Curtis estuary, Australia, utilizing the LISST instrument. The results show significant spatial and temporal trends in SPM sizes and concentrations, influenced by variable energy conditions on neap and spring tide cycles. Findings highlight the important influence of tidal regimes on SPM dynamics in estuarine environments.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Review
Engineering, Marine
Troels Aagaard, Joost Brinkkemper, Drude F. Christensen, Michael G. Hughes, Gerben Ruessink
Summary: Experimental results suggest that with increasing turbulence levels, peaks in suspended sediment concentration shift forward on the wave phase, and the near-bed sediment concentration scales with turbulent kinetic energy. The magnitude and intra-wave phase of turbulence production and sediment concentration depend on wave type, seabed configuration, and relative wave height, which may lead to more accurate predictions of transport rates for different wave and beach conditions.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Ebenezer Boakye, F. O. K. Anyemedu, Emmanuel A. Donkor, Jonathan A. Quaye-Ballard
Summary: Accurate information on sediment yield in the Pra River Basin, Ghana is crucial for proper catchment and water resources management. This study found high sediment yields in the basin, with significant differences between contributing drainage basins. Rivers in galamsey prone basins had higher sediment pollution levels. The study highlights the importance of considering land use activities and catchment characteristics in predicting sediment yield variations.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2022)
Article
Engineering, Marine
Ju Huang, Rui Yuan, Jianrong Zhu
Summary: This study used a three-dimensional sediment numerical model to investigate the water and sediment transport in Hangzhou Bay. The results showed that in summer, there were southward and westward flows from the Changjiang Estuary, with stronger intensity during the spring tide. The bottom water and sediment transport patterns were similar to the surface patterns. In winter, the transport patterns were similar to those in summer but weaker.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
David K. Ralston, Brian Yellen, Jonathan D. Woodruff
Summary: Observations and modeling were used to assess the potential impacts of sediment releases from dam removals on the Hudson River estuary. It was found that the main sediment load comes from side tributaries, and fine-grained sediment deposits spread broadly along the estuary while coarser sediment deposits near the source, with transport distance inversely related to settling velocity.
ESTUARIES AND COASTS
(2021)
Article
Geosciences, Multidisciplinary
Huan Liu, Leiping Ye, Wenjue Zhou, Jiaxue Wu
Summary: This study investigates the interaction between suspended sediment flocculation and salt-water dynamics in a tidal estuary in China. It reveals that the movement of the salt-wedge influences two distinct stages of sediment flocculation. The presence of a stable salt-wedge enhances flocculation in the first stage, while intense turbulence shear causes deflocculation in the second stage.
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
Geosciences, Multidisciplinary
Paolo Billi, Velibor Spalevic
Summary: This study utilized suspended sediment yield field data measured by the national and regional hydrological services to investigate the factors influencing sediment yield in Italy. The research found a wide variation in sediment yield and attributed the marked decrease in sediment yield in Italy to factors such as reduced annual precipitation and forest expansion.
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
Marine & Freshwater Biology
Sifat Sarwar, Alistair G. L. Borthwick
Summary: This article examines the uncertainty propagation from input floc size to output sedimentation rate in the Meghna estuary, Bangladesh. The results show that the coefficient of variation ranges from 20% to 38% across three locations. Planners need to consider substantial uncertainty in cohesive sediment transport estimates, especially in deposition-prone areas with increased flooding risk.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Environmental Sciences
Wenfei Jia, Yujun Yi
Summary: This study presents a numerical model that analyzes the sediment distribution and erosion-accretion patterns in the Yellow River Estuary (YRE) during the water-sediment regulation scheme (WSRS). The results show that WSRS effectively changes the sediment distribution and erosion condition in the YRE.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Andres Garcia-Ruiz, Manuel Carpio, Ricardo Giesecke, Maria Bermudez, Manuel Diez-Minguito
Summary: This study focuses on the estuarine regimes and subtidal circulation in the Valdivia River Estuary in southern Chile, and how they impact the distribution of Suspended Meso-Zooplankton Carcasses (SMZC). Field campaigns were conducted in 2014 and 2015, and time series of metocean forcings span from 2012 to 2018. The research highlights the importance of circulation-stratification relationships in controlling SMZC trapping mechanisms and identifying hotspots of benthic biomass in mid-latitude estuaries.
JOURNAL OF MARINE SYSTEMS
(2022)
Article
Geosciences, Multidisciplinary
Joshua Williams, Guan-hong Lee, Hyun-Jung Shin, Timothy Dellapenna
Article
Marine & Freshwater Biology
Sun Min Choi, Jun Young Seo, Ho Kyung Ha, Guan-hong Lee
ESTUARINE COASTAL AND SHELF SCIENCE
(2018)
Article
Geosciences, Multidisciplinary
Steven Miguel Figueroa, Guan-hong Lee, Hyun-Jung Shin
Article
Environmental Sciences
Nathalie W. Jung, Guan-hong Lee, Yoonho Jung, Steven M. Figueroa, Kenneth D. Lagamayo, Tae-Chang Jo, Jongwi Chang
Summary: The study introduces MorphEst, a MATLAB-based tool that automatically measures estuarine planform geometry by extracting information from channel masks and comparing it with independent measurements. The results show a high level of accuracy and applicability, making it helpful for solving research questions related to estuarine evolution.
Article
Oceanography
Steven M. Figueroa, Guan-hong Lee, Jongwi Chang, Nathalie W. Jung
Summary: Estuarine dams can amplify the tidal range and reduce tidal currents, leading to changes in estuarine types and affecting river runoff and tidal pumping.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)