Analysis of the Influence of Green Roofs in the reduction of the stormwater runoff hydrograph of a high Andean city in Ayacucho, Peru (#1452)
Read ArticleDate of Conference
July 19-21, 2023
Published In
"Leadership in Education and Innovation in Engineering in the Framework of Global Transformations: Integration and Alliances for Integral Development"
Location of Conference
Buenos Aires
Authors
Arone Velasquez, Jamil
Arancibia Samaniego, Ada Liz
Kuroiwa Zevallos, Julio Martin
Abstract
Use of green technologies in urban drainage systems has shown advantages with respect to traditional systems, such as a reduction in peak flows. This article compares the hydrologic response of a green roof to that of a conventional roof. The objective is to analyze the influence of green roofs in runoff reduction in urban drainage systems. Three different rain intensities, corresponding to return periods of 2, 5 and 10, were tested on a surface of 17.71 m2. Half of the cover was a green roof, and the other half was a tin roof, a conventional roofing system. In addition, slopes were adjusted to 10 %, 25 % and 20 %. Results show a reduction of up to 53 % in peak flows and a reduction of up to 68 % in outflow volumes. The lag time (time to peak discharge) increased in 10.3 minutes.