TY - GEN
T1 - ANALYSIS OF THREE-DIMENSIONAL DYNAMICS IN THE ST. LAWRENCE FLUVIAL ESTUARY
AU - Le Mouel, Maëlys
AU - Hammouti, Abdelkader
AU - PHAM VAN BANG, Damien
N1 - Publisher Copyright:
© 2025 IAHR – International Association for Hydro-Environment Engineering and Research.
PY - 2025
Y1 - 2025
N2 - This study presents a numerical investigation of the three-dimensional flow dynamics in the St. Lawrence Fluvial Estuary (SLFE), focusing on hydrodynamics interactions at a tidal junction. The research is based on the 3D numerical model, TELEMAC, to capture the complex tidal flow dynamic in this very important freshwater resource. The model is validated with high-resolution field and numerical data, ensuring its reliability for simulating seasonal variations in circulation patterns. It solves the Navier-Stokes equations to accurately represent turbulent flows. The study investigates the impact of vertical velocity components and hysteresis effects on flow dynamics and difference in behavior between channels, emphasizing the importance of advanced modeling techniques in understanding estuarine systems with complex geometry. Results reveal significant spatio-temporal variations in flow patterns and highlight the relevance of 3D modeling during periods of tidal reversal, particularly the presence of opposing currents, vortices and shear stress between vertical layers. These findings provide insight for future research on particle transport (micro/nanoplastics, sediment), pollution, and impacts of climate change.
AB - This study presents a numerical investigation of the three-dimensional flow dynamics in the St. Lawrence Fluvial Estuary (SLFE), focusing on hydrodynamics interactions at a tidal junction. The research is based on the 3D numerical model, TELEMAC, to capture the complex tidal flow dynamic in this very important freshwater resource. The model is validated with high-resolution field and numerical data, ensuring its reliability for simulating seasonal variations in circulation patterns. It solves the Navier-Stokes equations to accurately represent turbulent flows. The study investigates the impact of vertical velocity components and hysteresis effects on flow dynamics and difference in behavior between channels, emphasizing the importance of advanced modeling techniques in understanding estuarine systems with complex geometry. Results reveal significant spatio-temporal variations in flow patterns and highlight the relevance of 3D modeling during periods of tidal reversal, particularly the presence of opposing currents, vortices and shear stress between vertical layers. These findings provide insight for future research on particle transport (micro/nanoplastics, sediment), pollution, and impacts of climate change.
KW - 3D numerical modeling
KW - St. Lawrence fluvial estuary
KW - hydrodynamic
KW - secondary flow
KW - tidal current inversion
KW - tidal junction
UR - https://www.scopus.com/pages/publications/105024946846
U2 - 10.64697/978-90-835589-7-4_41WC-P1674-cd
DO - 10.64697/978-90-835589-7-4_41WC-P1674-cd
M3 - Contribution to conference proceedings
AN - SCOPUS:105024946846
SN - 9789083558974
T3 - Proceedings of the IAHR World Congress
SP - 1712
EP - 1721
BT - Proceedings of the 41st IAHR World Congress, 2025
A2 - Wing-Keung Law, Adrian
A2 - Er, Jenn Wei
PB - International Association for Hydro-Environment Engineering and Research
T2 - 41st IAHR World Congress, 2025
Y2 - 22 June 2015 through 27 June 2015
ER -