Tidal Circulation in North Biscayne Bay

The hydrodynamic exchange in this barrier island lagoon that has been highly modified by dredging and causeway construction is analyzed using field measurements and numerical models. Based on the field observations, a nested numerical modeling approach is adapted to determine the tidal and winddriven flow and circulation. The nesting of one‐ and two‐dimensional models provides an efficient solution method without sacrificing predictive ability or resolution. Alternatives for enhancing hydrodynamic transport and circulation by modifying the geometry of the bay are evaluated and residence times for present conditions are determined.