Uso de telhados verdes para controle de águas pluviais urbanas em Teresina – Piauí
DOI:
https://doi.org/10.51359/2238-6211.2021.246116Keywords:
drenagem urbana, desenvolvimento de baixo impacto, telhados verdes.Abstract
Ao longo dos últimos anos, o meio científico tem exposto suas críticas quanto à flexibilidade limitada das soluções convencionais de drenagem no combate às inundações urbanas. Atualmente, novas tecnologias têm surgido com intuito de garantir soluções sustentáveis ao gerenciamento urbano de águas pluviais, sendo chamadas de Desenvolvimento Urbano de Baixo Impacto (Low Impact Development-LID). Este estudo avaliou o uso desses dispositivos na bacia hidrográfica PD14 localizada na cidade de Teresina, Piauí, observando os efeitos de sua implementação para mitigação de escoamentos superficiais. O software PCSWMM foi utilizado para modelagem de LIDs do tipo telhado verde na área de estudo, considerando dois cenários diferentes de abrangência das LIDs modeladas. A partir da análise dos cenários modelados, observou-se a redução do volume total de água escoada variando entre 4,7 % e 12,13%, além da redução do pico de escoamento e atraso no início do deflúvio. Os resultados demonstraram a utilidade prática do uso de telhados verdes como medida eficaz de controle e mitigação do escoamento superficial em bacias urbanas.
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