Author(s): Nian She; Elizabeth Fassman; Ly Voyde
Linked Author(s):
Keywords: Living roof; Green roof; Green-Ampt; Infiltration; Field capacity; Darcy's Law
Abstract: Living roof (green roof) technology has started to emerge as a promising type of stormwater runoff control device for retaining rainfall volume and attenuating storm runoff peak flows from urban areas. A physically-based green roof model is presented to describe underlying hydrological and hydraulic processes of living roofs. The results of simulations are compared to field monitoring data of a hydraulically isolated approximately 46 m 2 section of the University of Auckland (UoA) living roof. From the calibrations and validations it shows that the model is capable to capture the major characteristics of significant events and is robust for the continuous simulation. In addition, the statistical analysis shows that the living roof under the study significantly reduced peak runoff and total volume of the storm events. The peak runoff reduction in this study is about 83%and the total volume reduction is about 67%over the period of October 2008 to October 2009, where 1137.2 mm of rainfall was received.
Year: 2010