Variabilidade Climática, Disponibilidade Hídrica e ETA Guandu: Uma Análise Qualitativa de Vulnerabilidade.

• Autor(a) principal: Nogueira, Maria Augusta Roberto Braga
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/10902
• topic: Climate variability; Water supply; Guandu water treatment plant, vulnerability; Paraiba do Sul and Guandu river basins; Rio de Janeiro; Variabilidade climática; Disponibilidade hídrica; ETA Guandu; Vulnerabilidade; Bacias dos rios Paraíba do Sul e Guandu; Rio de Janeiro; CNPQ::ENGENHARIAS

The water treatment plant of Guandu has vital importance to the state of Rio de Janeiro, since it is responsible for supplying 8.5 million people in Greater Rio. This study aims to make a qualitative analysis of the WTP vulnerability in relation to the quality and quantity of water resources regarding various stress factors, aiming to scale the importance of climate variability for the composition of global vulnerability. It was adopted the concept of vulnerability as a function of exposure (the degree to which a system experiences stress), sensitivity (the degree to which a system is affected by stress) and adaptive capacity (the ability of a system to adjust to, moderate, or deal with the consequences of a stress). Therefore, it was possible to develop a methodology for vulnerability qualitative analysis, specifically for the case of Guandu WTP, concerning the four most crucial stressors for current vulnerability: i) climate variability, ii) interbasin water transfer, iii) environmental conditions and water quality, and iv) environmental accidents. The results showed that the highest degree of vulnerability of Guandu WTP is related to the water transfer, since various parts of its infrastructure do not receive preventive maintenance actions. The vulnerability due to environmental conditions is also intense, especially the turbidity in the rainy season; between 2000 and 2010, the WTP has been partially paralyzed 22 times due to the large amount of sediment. This work did not identify any record of a complete interruption of WTP Guandu due to environmental accidents, although sometimes they have imposed transposition shutdown. The component 'climate variability' (intensification of extreme hydrological events) proved to be the least stressful determinant for current vulnerability.