Article
Multidisciplinary Sciences
Danial Khojasteh, Shengyang Chen, Stefan Felder, Valentin Heimhuber, William Glamore
Summary: The response of estuaries to sea level rise is complex and influenced by various factors such as energy drivers, estuarine geometry, and fluid properties. Overall, sea level rise tends to amplify tidal range in different estuary types, except for short estuaries where it may attenuate tides. Changes in tidal range are more pronounced in certain types of estuaries, such as converging estuaries or those with strong river inflows.
Article
Engineering, Marine
Lizhi Teng, Heqin Cheng, Erfeng Zhang, Yajun Wang
Summary: This study focuses on the lateral variation of tidal mixing asymmetry and longitudinal sediment transport at the landward boundary of turbidity maximum zone in the North Channel of Yangtze estuary. The analysis reveals that there is regular tidal mixing asymmetry in the main channel, with stronger vertical mixing during flood tide. This results in higher suspended sediment concentrations during flood tide and landward sediment transport. On the shoal, the tidal mixing asymmetry is reversed, with weaker vertical mixing during flood tide and seaward sediment transport. Additionally, large river discharge increases the seaward advection sediment flux in the main channel, contributing to the seaward tidally averaged sediment flux.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Geography, Physical
J. B. Hinwood, E. J. McLean
Summary: This study utilizes a multi-factor approach to assess the dynamics of small intermittently open and closed estuarine lakes and lagoons, using publicly available data. The results show that these estuaries have a sequence of regime states, with transitions driven by external forcings.
Article
Environmental Sciences
Jinyang Wang, Yoeri M. M. Dijkstra, Huib E. de Swart
Summary: The aim of this study is to understand the processes that determine the dynamics of estuarine turbidity maximum (ETM) in channel networks. It is found that the ETM dynamics in a network is coupled, with changes in one channel affecting the ETM pattern in all channels. Additionally, the deepening or narrowing of a seaward channel can influence the ETMs in the entire network.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Oceanography
Jingui Liu, Yichun Li, Qingqing Pan, Tianyu Zhang
Summary: A high-resolution model was used to investigate the suspended sediment transport and estuarine turbidity maxima (ETM) in the Oujiang Estuary in southeastern China. The ETM was found to be mainly caused by tidal resuspension, and it was strengthened during low river discharge. The migration of the ETM was influenced by both river and tidal regime and showed semi-diurnal variability.
CONTINENTAL SHELF RESEARCH
(2023)
Article
Meteorology & Atmospheric Sciences
Rui Zhang, Bo Hong, Lei Zhu, Wenping Gong, Heng Zhang
Summary: This study examined the morphological evolution and hydrodynamic responses of the Huangmaohai estuary in southern China. The results showed that human activities have significantly changed the estuary's topography and modified its circulation patterns.
Article
Multidisciplinary Sciences
Rajesh K. Mahato, Sk Zeeshan Ali, Subhasish Dey
Summary: We investigate the growth rate, resonant wavenumber, and phase velocity of longitudinal sediment waves generated by the interaction of turbidity currents with an erodible bed through linear and weakly nonlinear stability analyses. The study reveals the influence of key parameters on these quantities and the migration of sediment waves. A stability diagram accurately captures experimental data within the unstable zone. The weakly nonlinear analysis provides the equilibrium amplitude of sediment waves and its sensitivity to key parameters, with results comparable to field observations.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Vu Duy Vinh, Sylvain Ouillon
Summary: The characteristic parameters, aggregates, and tidal variations of Estuarine Turbidity Maxima (ETM) were studied in the Cam-Nam Trieu mesotidal estuary in North Vietnam. Two distinct zones of high turbidity were observed around the salt wedge, separated by a zone of lower turbidity. The location and characteristics of ETM vary seasonally.
Article
Environmental Sciences
Christine L. Weilhoefer, Cristiana N. Matteucci, Frances Turner
Summary: This study found that distance from the estuary mouth and salinity are the most important predictors of diatom assemblage structure, while microphytobenthos biomass is highest in the downstream estuary characterized by higher salinities, SRP, and substrate sand composition.
ESTUARIES AND COASTS
(2021)
Article
Mechanics
Jorge S. Salinas, S. Balachandar, Santiago L. Zuniga, M. Shringarpure, J. Fedele, D. Hoyal, M. Cantero
Summary: Gravity currents are studied in this work, focusing on the flow of a heavier fluid along the bottom of a sloping bed, beneath a stagnant lighter ambient fluid. The thickness of the current increases due to entrainment of ambient fluid. The rate of penetration of mean momentum, mean concentration, and turbulence-related quantities into the ambient fluid are analyzed, with a comparison to wall-bounded turbulent flows.
Article
Geology
Alexandre Normandeau, Jordan B. R. Eamer, Pascal Bernatchez, David Didier, Patrick Lajeunesse, Audrey Limoges, Jean-Carlos Montero-Serrano
Summary: This study describes the distribution of sediment density flows on wave-influenced deltas by examining four deltaic sedimentary systems at different stages of their evolution on the continental inner shelf of eastern Canada. The results suggest that sediment density flows occur in various types of environments, including large deltas, wave-influenced to wave-dominated deltas, and advanced stages of wave-dominated deltas. Different types of sediment density flows were identified, characterized by debris flows, surge-type turbidity currents, and hyperpycnal flows.
Article
Oceanography
Chunyan Zhu, Dirk Sebastiaan van Maren, Leicheng Guo, Jianliang Lin, Qing He, Zheng Bing Wang
Summary: In this study, the effects of sediment-induced density gradients (SedDG) on sediment transport and salt intrusion were investigated using a three-dimensional numerical model. It was found that longitudinal and vertical SedDG respectively weakened and promoted the estuarine turbidity maximum (ETM), influencing salt intrusion. These findings are crucial for managing sediment and freshwater resources in highly turbid estuaries.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Marine & Freshwater Biology
Laura C. Feher, Michael J. Osland, Christopher M. Swarzenski
Summary: By applying the Coastal Salinity Index (CSI) to 22 years of salinity data in the Barataria Estuary, Louisiana, this study examined the impacts of extreme events on estuarine salinities. The results showed that droughts, hurricanes, floods, and freshwater flow alterations influenced the salinity patterns in the estuary. The study provides valuable insights into the influence of extreme events on estuarine salinity regimes and emphasizes the importance of the CSI for identifying periods with extreme salinities.
ESTUARINE COASTAL AND SHELF SCIENCE
(2023)
Article
Environmental Sciences
Amanda Domingues Martins, Francisco Barros
Summary: Function in ecology refers to the role played by each component in the surrounding environment. This study investigated the functional traits and variations in abundance of estuarine macrofauna along estuarine gradients. The researchers found that nutrient cycling, bioturbation, and fragmentation of organic matter were the most frequent functions performed by estuarine benthic assemblages. Furthermore, they discovered that these functions varied in intensity over different salinity zones and also showed significant variability in time. The study emphasizes the importance of using traits associated with ecological functions to investigate function and function intensity.
FRONTIERS IN MARINE SCIENCE
(2022)
Review
Mechanics
Thomas Peacock, Raphael Ouillon
Summary: The evolution and fate of sediment plumes in the deep sea mining industry are determined by transport processes, which require more fundamental and applied fluid mechanics research for accurate prediction. Efforts combining theory, modeling, experiments, and trials have made progress in assessing the role of parameters in setting the extent of plumes, but there are currently no established best practices for the design and operation of mining technologies.
ANNUAL REVIEW OF FLUID MECHANICS
(2023)