4.2. Models
The internal structure of the block “Model simulation” in the proposed application is disclosed in Fig. 2. It shows the models used, and the flow of all the signals from inputs to outputs. A biogeochemical model represents the core of the structure, since it provides simulated values of the main biological, physical and chemical parameters of the lagoon, as well as predictions of the clam production. These values are used to perform various kinds of analyses (namely, environmental, exergetic, and economic analyses), and to compute the set of indicators assessing the performance of the simulated alternative.