Modelagem e simulação da dispersão de dióxido de carbono na Usina Hidrelétrica de Manso e região

Abstract

This thesis presents a study of the problem of dispersion of carbon dioxide in the water-air environment, where the objective is to propose an unprecedented threedimensional (3D) mathematical model and numerical simulation with scenarios about a region surrounding of Manso hydroelectric power plant. The dispersion process is modeled through a system of partial di usion-advection di erential equations, with velocity elds adopted as a parameter in the Di usion equation, and they present variation in time, consequently contributing to the originality and novelty of the presented model. Also for the chosen domain, boundary conditions were assigned varying in space and time, which made the model more complex, but this choice provided a greater description of reality and a new way of studying this phenomenon, that up to the present moment, there is no publication done in this area, that adopted these characteristics described previously. It was also carried out the implementation of a computational program with real data, that is, data collected at the research at that location, through some simulations, created di erent scenarios, which allowed to illustrate the qualitative capacity of the model, its computational approach and verify the behavior of the carbon dioxide concentration unprecedented in this chosen area, which is fundamental to understanding the e ects of change in global and regional biogeochemical cycles, as well as the role of tropical terrestrial ecosystems in the carbon dioxide balance at this location.