Modelagem de qualidade de água como suporte ao processo de enquadramento de corpos d’água superficiais : considerações sobre a bacia hidrográfica do Rio Guandu

• Ano de defesa: 2024
• Autor(a) principal: Pani, Deysilara Figueira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Ambiental; Centro Tecnológico; UFES; Programa de Pós-Graduação em Engenharia Ambiental
• Palavras-chave em Português: Instrumentos de gestão; Gerenciamento de recursos hídricos; Modelagem matemática; Management tools; Water resources management; Mathematical modeling; Guandu, Rio, Bacia (ES); Engenharia Sanitária
• Link de acesso: http://repositorio.ufes.br/handle/10/18271

Mathematical water quality modeling is a fundamental tool in supporting the classification process of water bodies, enabling the analysis of various scenarios that directly contribute to decision-making regarding the definition of use classes. In this context, it is crucial that the simulations accurately reflect the water quality of the analyzed water bodies. Extrapolated results may lead to classifications whose implementation becomes costly and/or unfeasible. In this sense, the present study aimed to investigate the use of water quality modeling as support for the classification process of surface water bodies, focusing on the Guandu River basin, located in the state of Espírito Santo, Brazil. The mathematical water quality modeling, conducted using the Water Resources Management GIS Integrated Tools (WARM-GIS Tools) model, was applied to two different scenarios, based on variations in the initial water quality data sets, reference flow values, and the adopted kinetic constants. Subsequently, with the support of the CPQ-WATER Decision Support System and for the different simulation scenarios, the frequency of compliance with the quality standards of the various use classes, the maximum allowable loads, the loads to be treated, the unused dilution capacity, and the pressure on the watercourse in a section of the Guandu River located downstream from the urban center of Laranja da Terra were evaluated. The results indicated that the reference flows used in the present study did not produce significant differences in compatibility with the quality standards of the different use classes. However, the initial water quality conditions and the values adopted for the kinetic constants significantly and diversely altered the water quality simulation results, affecting compatibility with the quality standards established for the use classes, and ultimately influencing the decision-making process associated with the classification of the watercourses