The development and application of a two dimensional tidal hydrodynamics model which is capable of describing the velocity and salinity distribution for Barataria Bay is presented. The model is intended to be used in evaluating the effects of diversion of fresh water to Barataria Bay. The model has been verified and demonstrated in Barataria Bay for selected periods for which hydrologic and water quality data were available. In this study simulation of hydrodynamic and salinity response corresponding to a mean annual inflow, low flow and flood flow are provided. In these applications the effect of different dispersion coefficients, time steps and fresh water inflow upon velocity and salinity distribution are tested. In each run a comparison between computed and measured values is made
