Tidal Flow and Mass Transport in a Slowly Converging Estuary

Horizontal Lagrangian transport in a tidal-driven estuary—Transport barriers attached to prominent coastal boundaries

Horizontal Lagrangian surface transport is studied in the Ria de Vigo, an estuary in NW Spain with tidal and wind-driven dynamics. Surface drifters and the surface flow from a high-resolution 3-D hydrodynamic model are compared to each other. In particular, our analysis is based on a classical comparison of real and artificial trajectories and on Lagrangian Coherent Structures (LCS) defined as ...

Zooplankton sample variability in a tidal estuary :

A series of 347 vertical zooplankton hauls was made at a 175-h anchor station in the upper St. Lawrence estuary, Quebec, and current meter profiles were recorded. The 95% confidence interval of a single observation in most of the copepod time series was about 25400% of the mean. Temporal variability consisted for the most part of semidiurnal fluctuations superimposed on a long term trend. Other...

Transport in a slowly perturbed convective cell flow.

We study transport properties in a simple model of two-dimensional roll convection under a slow periodic (period of order 1/ varepsilon >>1) perturbation. The problem is considered in terms of conservation of the adiabatic invariant. It is shown that the adiabatic invariant is well conserved in the system. It results in almost regular dynamics on large time scales (of order approximately vareps...

Modeling the tidal and sub-tidal hydrodynamics in a shallow, micro-tidal estuary

Transport in the Hudson Estuary: A Modeling Study of Estuarine Circulation and Tidal Trapping

The effects of estuarine circulation and tidal trapping on transport in the Hudson estuary were investigated by a large-scale, high-resolution numerical model simulation of a tracer release. The modeled and measured longitudinal profiles of surface tracer concentrations (plumes) differ from the ideal Gaussian shape in two ways: on a large scale the plume is asymmetric with the downstream end st...