Avaliação da hidrodinâmica e conectividade no Parque Estadual Marinho da Pedra da Risca do Meio utilizando modelagem numérica

Abstract

The conservation unity Parque Estadual Marinho da Pedra da Risca do Meio (PEMPRM), in the state of Ceará, Brasil, was created in 1997, being located around 20 kilometers from the coast of the city of Fortaleza (CE). However, it was only in 2019 that the process to develop the management plan initiated. In the light of the development of the management plan, it is necessary that researches are developed to fullfil the gaps in the knowledge about the conservation unit, specifically, in this study, in regards to the local hydrodynamic circulation and conectivity with regions in coast of Fortaleza. For that, the numerical modelling software Delft3D, which solves hydrodynamic equations and presents the results for posterior avaliation, was used. The hydrodynamic conditions between 01/06/11 and 01/06/2012 were simulated in 2D, releasing generic particles with sufficient concentration to be observed in the grid’s resolution, along with marine fuel oil in the region of the Mucuripe port and in the conservation unit’s area, to verify their behavior within the local hydrodinamic conditions. The results indicated a short persistence of the particles released inside the unity’s area, being outside the area after the 12th hour timestep after release, in all months. Besides, the simulated oil release in the port does not reach a unity’s area too. It was also simulated a continous release close to the Cocó river, with the intention to verify its conectivity with the conservation unity. It was noted that at two specific moments (18/07/11 and 08/08/11) the river particles entered the unity’s area, even without including the hydrodynamic influence of the river’s estuary in the simulation. June and August presented episodes of rio Coco’s conectivity.