Economic Analysis for Implementing Sustainable Urban Drainage Systems in Amazonian Cities: the case of Itaituba, Pará, Brazil
DOI:
https://doi.org/10.5902/2179460X90061Keywords:
Urban Water, Compensatory Techniques, Rain Garden, Infiltration Trench, CostsAbstract
Unbridled urbanization causes complex problems for urban drainage during rainy seasons, such as flooding, waterlogging and landslides. For developing cities in northern Brazil, the use of Sustainable Urban Drainage Systems (SUDS), combined with conventional networks, presents a promising alternative to reduce such problems during the Amazon winter. In this regard, this study analyzed the economic feasibility of using SUDS in the municipality of Itaituba, located in the countryside of the Amazon. To this end, two stages were conducted: SUDS dimensioning, considering rain gardens and infiltration trenches; and estimation of costs for implementing these systems, based on prices from the Brazilian National System of Research of Costs and Indexes of Civil Construction (SINAPI - Sistema Nacional de Pesquisa de Custos e Índices da Construção Civil) and local quotations. The results indicated that infiltration trenches are, on average, 13% more economical than rain gardens. When only the costs by local quotation are assessed, this savings can reach 27%. In short, it is believed that the results can guide decisions and actions in local urban planning, aiming for a more resilient, sustainable city that is prepared for the challenges related to urban drainage.
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