TY  - EJOU
AU  - Chanson, H.  
AU  - Tan, K.K.  

TI  - Dispersion of Fish Eggs under Undular and Breaking Tidal Bores
T2  - Fluid Dynamics \& Materials Processing

PY  - 2011
VL  - 7
IS  - 4
SN  - 1555-2578

AB  - A tidal bore is a wall of water propagating upstream as the tidal flow turns to rising into an estuary with a tidal range larger than 5 to 6 m and the bathymetry that amplifies the tidal wave. The bore front is a shock characterised by a singularity of the free-surface and pressure and velocity fields. This study aims to characterise the impact of tidal bores on the turbulent dispersion of fish eggs. Some physical modelling was performed based upon a Froude similitude and the tracking of plastic beads acting as fish egg proxies was conducted under controlled flow conditions with both undular and breaking tidal bores. The physical experiments highlighted some large-scale coherent structures generated beneath the bore front and advected behind. The vortical structures were responsible for some selective longitudinal dispersion of fish eggs depending upon the eggs' relative density.
KW  - Tidal bores
KW  -  Turbulent dispersion
KW  -  Fish egg dispersion
KW  -  Mixing
KW  -  Physical modelling

DO  - 10.3970/fdmp.2011.007.403