Simulação da compartimentação em reservatório no semiárido brasileiro uso da modelagem hidrodinâmica como ferramenta de gestão

Abstract

The hydrodynamic simulation of the Acarape do Meio reservoir, located in the Brazilian tropical semi-arid region, was performed using SisBaHiA mathematical model, based on reservoir bathymetry, affluent flows and climatological data. The reservoir, built in 1924, has strategic importance for the management of water esources of Fortaleza metropolitan region, serving part of the population in its various uses. The model estimated the hydrodynamic circulation, the residence time and the renewal rates, fundamental for understanding the compartmentalization of the aquatic environment. Although rainfall is the main cause of change in renewal rates, as expected, total water body renewal was only observed in the recess areas. Using Lagrangian transport module, a residence time of more than 100 days was estimated in most of the compartments, mainly in the transition and lacustrine areas. On the other hand, in dendritic areas, values greater than 365 days were estimated, which could intensify nutrient recirculation and the eutrophication of the reservoir.