A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Performance of rainwater tanks for runoff reduction under climate change scenarios: a case study in Brazil
Rainwater tanks or cisterns are a low impact development infrastructure used to control stormwater runoff and reduce water demand. However, climate change may affect its performance due to increased rainfall intensities. This study evaluates the uncertainty on the effectiveness of cisterns to reduce peak runoff under climate change in an urban watershed in Brazil. Twelve updated intensity-duration-frequency curves, based on six Global Circulation Models and two Representative Concentration Pathways (RCP 4.5 and RCP 8.5) from the Coupled Model Inter-comparison Project 5, were used to yield hyetographs for 2 h-storm events with different recurrence intervals. Peak runoff reduction ranged between 0.4% and 5.5% for RCP 4.5 and 0.4% and 6.3% for RCP 8.5. Under climate change, a reasonable runoff control could be reached if at least 20% of the buildings installed a 5 m3 cistern. Uncertainty in future climate should be addressed in rainfall-runoff modelling to guide stormwater management decisions.
Performance of rainwater tanks for runoff reduction under climate change scenarios: a case study in Brazil
Rainwater tanks or cisterns are a low impact development infrastructure used to control stormwater runoff and reduce water demand. However, climate change may affect its performance due to increased rainfall intensities. This study evaluates the uncertainty on the effectiveness of cisterns to reduce peak runoff under climate change in an urban watershed in Brazil. Twelve updated intensity-duration-frequency curves, based on six Global Circulation Models and two Representative Concentration Pathways (RCP 4.5 and RCP 8.5) from the Coupled Model Inter-comparison Project 5, were used to yield hyetographs for 2 h-storm events with different recurrence intervals. Peak runoff reduction ranged between 0.4% and 5.5% for RCP 4.5 and 0.4% and 6.3% for RCP 8.5. Under climate change, a reasonable runoff control could be reached if at least 20% of the buildings installed a 5 m3 cistern. Uncertainty in future climate should be addressed in rainfall-runoff modelling to guide stormwater management decisions.
Performance of rainwater tanks for runoff reduction under climate change scenarios: a case study in Brazil
Nunes Carvalho, Taís Maria (author) / de Souza Filho, Francisco De Assis (author) / Medeiros de Sabóia, Marcos Abílio (author)
Urban Water Journal ; 17 ; 912-922
2020-11-25
11 pages
Article (Journal)
Electronic Resource
Unknown
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