Methodology for the selection of urban drainage micro basins for micro-reservoir implantation: a case study of the Tijuca basin, RJ

• Autor(a) principal: Ohnuma Jr., Alfredo Akira
• Data de Publicação: 2018
• Outros Autores: Obraczka, Marcelo, Silva Jr., Luis Carlos Soares da, Leal, Isaias Fagundes, Muricy, Bruno
• Tipo de documento: Artigo
• Idioma: por; eng
• Título da fonte: Sistemas & Gestão
• Texto Completo: https://www.revistasg.uff.br/sg/article/view/1393
• topic: Urban drainage; Microreservatories in particular areas; Upstream retention; Flow peak damping.; Drenagem urbana; Microreservatórios em áreas particulares; Retenção a montante; Amortecimento de picos de vazão

More densely urbanized areas are increasingly suffering from flood and flood-related problems due to the lack of capacity of existing drainage systems. Currently, several project alternatives have been presented as unconventional urban drainage measures with the objective of reducing the impacts of surface runoff in urbanized areas, such as the implementation of delay and upstream retention systems, as well as the sharing of responsibility between public and private actors. The present work aims to define specific criteria for the selection of urban drainage basins, which present a greater feasibility of implementing microreservatories for the abstraction and storage of rainwater in lots distributed in a given region. The methodology consists of the analysis of two distinct areas in Grande Tijuca, Rio de Janeiro, RJ, a region historically strongly affected by urban floods. The selection and hierarchization of drainage basins with the greatest potential for micro-reservoir implantation was performed according to the following criteria: (1) existence of large areas of waterproofing, especially coverings and roofs; (2) reduced efficiency/operational capacity of existing local microdrainage systems; (3) lack of external basins and/or backwater of the receiving body; (4) the potential of the use of stored rainwater. According to established criteria, it is feasible to define priority areas for the implementation of upstream damping by means of microreservatories in the lots, increasing the possible benefits of using this technique. Future work is recommended to deepen the feasibility studies, with hydrological and hydraulic modeling of the basins and respective drainage systems.