Modelagem fuzzy para sistema DBO/OD em reservatório com estratificação térmica utilizando modelos de balanço de massa

• Ano de defesa: 2016
• Autor(a) principal: Vidal, Ticiana Fontoura
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Recursos hídricos; Reservatórios; Sistemas difusos; Água - Qualidade; Modelagem matemática
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/18469

The study was aimed at developing a methodology to assess the risk of failure of a stratified reservoir in climate change scenarios, hydrologic and hydraulic, checking the behavior of biochemical oxygen demand and dissolved oxygen, as well as assess how these main changes will affect the quality aspects of the water system as a whole. To this end, we used computer mathematical modeling structured to provide a mathematical description and closer to reality. a methodology with fuzzy logic application to investigate how these changes can interfere with the operation of great state of a reservoir, in order to improve the understanding and management of water resources through various computer simulations was created without the need for require large expenditures. Among the simulations and results showed that the higher the water flow at the entrance, the less the risk of failure in relation to BOD, since the DO concentration increases, consequently the reduction of BOD. In another scenario, for more organic load of releases that W = 2500 kg / month, the risk of failure increased significantly, due to decreased oxygen concentrations caused by degradation of organic matter. It was also found that evaporation is a critical factor in the water balance, intensity influences directly the concentrations of DO and BOD. For large evaporated flows, the risk remains high, especially during the dry season, concluding that evaporation is a factor capable of interfering in both the dynamics of the reservoir and in the deterioration of water quality. Thus, developing effective control measures, particularly in semi-arid regions with low rainfall, become essential to the conservation of source water quality