Stormwater runoff control systems: Green roofs vs. Storage tanks

Abstract

The conventional rainwater and wastewater urban drainage systems commonly used in most of the cities around the world, recently face a great challenge related with the fast waterproofing of surfaces, urban overexpansion, high densification, as with the precipitation changes arising from the climate change. In spite of the large variety of stormwater runoff control and management alternatives proposed around the world, as the known Sustainable Urban Drainage Systems (SUDS), for the highly densified urban areas this alternative solutions are limited due to the lack of available area to guarantee an adequate and effective operation of such a systems. Thus, considering the Green Roofs and Storm Tanks as the most widely used stormwater runoff control systems in highly densified urban areas, a rainfall-runoff model was developed in EPA SWMM with the stormwater drainage system of Chicó Norte sector in Bogotá City (Colombia) in order to compare and analyze the performance and effectiveness of these control systems before a scenario of climate change