Performance of StormPav Green Pavement as Detention Pond Stormwater Management Infrastructure

Abstract

Implementation of green pavement practices can significantly improve the rainfall-runoff responses. StormPav, a system consisting of a micro-detention pond covered with precast honeycomb as surface and base structure layer is proposed to serve as an alternative green pavement application. The main focus of this study is to investigate the hydrological benefits of the proposed system. Detention storage capacity of the system was constructed under two different conditions, (i) various void capacities at road pavement thickness of 450 mm and (ii) 70% void capacity with different pavement thickness. The system can provide significant peak runoff reduction, resulting from the detention storage which is able to store the 10 to 100-year major storm events within duration of 20 to 30 minutes without overflow. In other words, such a condition allows the system to cope with the urban major storms which normally have a time of concentration of 10 to 15 minutes.