Alternatives for rainwater management through nature-based solutions in the urban context of Londrina
Nature Based Solutions (SBN) are actions inspired and supported by nature for the sustainable management of natural resources and processes in response to socio environmental challenges. This study aims to assess the use of NBS for stormwater management in urban areas. At first, it brings a systemat...
| Autor principal: | Alves, Ronaldo Adriano |
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| Formato: | Dissertação |
| Idioma: | Inglês |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2022
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/30086 |
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| Resumo: |
Nature Based Solutions (SBN) are actions inspired and supported by nature for the sustainable management of natural resources and processes in response to socio environmental challenges. This study aims to assess the use of NBS for stormwater management in urban areas. At first, it brings a systematic search on a literature review, where 43 articles on NBS were selected and evaluated. All these documents share practical interventions experiences of NBS worldwide and reveal numerous essential findings, with key ecosystem benefits. The use of NBS to mitigate flood risks is one of such pratical interventions in urban areas. Therefore, the work advances in identifying flood risks in the Igapó Lake basin, wich is surrounded by the urban area of Londrina city, located in the southern region of Brazil. The methodology was based on four main steps: basin characterization, elaboration of the conditioning factors of the flooding, susceptibility analysis in the GIS environment, and model sensitivity analysis. The parameters considered in this study were: flow concentration, land use, slope, distance from the discharge channel, and altimetry. The results found indicate that about 3.1 km² (10.3%) of the basin is exposed to a high or very high risk of flooding, reinforcing the need for intervention and the potential for implementing NBS in the study area. Finally, a criteria based selection for application of NBS was presented for the investigated urban area and the feasibility of implementing 10 kinds of NBS was tested. The public and private spaces analysis was conducted based on the following criteria: slope, distance from the groundwater level, hydrological type of soil, infiltration rate, and distance from foundations. All NBS presented were considered suitable for the study area. However, the solution that showed the most significant potential for implementation in relation to the basin's total area was rain barrels, about 37.1% of the basin area, followed by tree pits and rain gardens, with a potential for implementation of 27.9% and 25.4% of the area, respectively. |
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