In this study, models of the salinity dynamics in a choked lagoon for both monthly and intertidal scales were developed. The intertidal model was used to simulate the salinity drop and recovery processes due to runoff events, while the monthly model was coupled with a newly developed heuristic population model for the bivalve mussel Sururu (Mytella Falcata). Thus, the impact of the salinity interannual seasonality on the mussel population was qualitatively investigated.

In the present study, a morphological model based on the main governing processes of inlet channels was developed for application in long-term simulations, requiring minimum data on forcing and only key information on the inlet geometry.

A semi-analytic model is developed to describe the flow through an inlet between a lagoon and the sea due to a simple tide and the related morphological response of the inlet.

In this study, the importance of tides for the water exchange was investigated in Mundaú Lagoon, which is a choked lagoon located in northeastern Brazil that has a very dynamic inlet and channel system.