Turbulence and mixing variability in a microtidal estuary subject to mixed semidiurnal tidal cycles

verfasst von: Jan Tiede, Remo Cossu, Jan Visscher, Alistair Grinham, Torsten Schlurmann
Abstract: Reynolds stresses and Turbulent Kinetic Energy (TKE) are instrumental in quantifying the turbulent dynamics that govern mixing and momentum transport in estuaries, factors crucial for understanding and managing estuarine circulation, water quality, and sediment transport. Employing Acoustic Doppler Current profilers, this study investigated hydrodynamics and turbulence in the Brisbane River, Australia. Measurements were conducted at two locations, covering the mouth and middle reach of the estuary. Of particular interest were flow reversals during flood flows, adding complexity to the turbulent dynamics. Reynolds stresses at site I were primarily generated by bed shear, while site II showed more complex stresses due to density differences and lateral circulations. At the river mouth, the mixed semidiurnal tidal regime led to a highly variable turbulent regime, with subsequent flood and ebb events exhibiting markedly different characteristics.
Organisationseinheit(en): Ludwig-Franzius-Institut für Wasserbau, Ästuar- und Küsteningenieurwesen
Externe Organisation(en): University of Queensland
Typ: Artikel
Journal: Frontiers in Marine Science
Band: 12
ISSN: 2296-7745
Publikationsdatum: 21.02.2025
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Ozeanographie, Globaler Wandel, Aquatische Wissenschaften, Gewässerkunde und -technologie, Umweltwissenschaften (sonstige), Meerestechnik
Elektronische Version(en): https://doi.org/10.3389/fmars.2025.1447316 (Zugang: Offen)

BibTeX

@article{9b6f2b5ff16b45148085916b1836ca04,
title = "Turbulence and mixing variability in a microtidal estuary subject to mixed semidiurnal tidal cycles",
abstract = "Reynolds stresses and Turbulent Kinetic Energy (TKE) are instrumental in quantifying the turbulent dynamics that govern mixing and momentum transport in estuaries, factors crucial for understanding and managing estuarine circulation, water quality, and sediment transport. Employing Acoustic Doppler Current profilers, this study investigated hydrodynamics and turbulence in the Brisbane River, Australia. Measurements were conducted at two locations, covering the mouth and middle reach of the estuary. Of particular interest were flow reversals during flood flows, adding complexity to the turbulent dynamics. Reynolds stresses at site I were primarily generated by bed shear, while site II showed more complex stresses due to density differences and lateral circulations. At the river mouth, the mixed semidiurnal tidal regime led to a highly variable turbulent regime, with subsequent flood and ebb events exhibiting markedly different characteristics.",
keywords = "ADCP, estuary, reynolds stresses, TKE, turbulence",
author = "Jan Tiede and Remo Cossu and Jan Visscher and Alistair Grinham and Torsten Schlurmann",
note = "Publisher Copyright: Copyright {\textcopyright} 2025 Tiede, Cossu, Visscher, Grinham and Schlurmann.",
year = "2025",
month = feb,
day = "21",
doi = "10.3389/fmars.2025.1447316",
language = "English",
volume = "12",
journal = "Frontiers in Marine Science",
issn = "2296-7745",
publisher = "Frontiers Media S.A.",
}