Efeito combinado de telhado verde e pavimento permeável no controle da geração do escoamento superficial

Abstract

The increasing number of inhabitants associated with the lack of urban planning resulted in the disorderly increase of urban areas and consequently the intensification of impermeable surfaces in the cities, causing floods, material damages to the population, dissemination of diseases and impacts to the environment. The implantations of traditional urban drainage systems, a hygienist concept, in the early 20th century, have become essential for remediation to these problems, however, the main purpose of this system is to transfer downstream runoff as quickly as possible with macrodrainage interventions and thus to reduce flooding problems only locally, but not in a definitive way. To mitigate the impacts resulting from traditional systems, the Low Impact Development strategy emerges, consisting of methods based on integrated subcatchment scale planning and the installation of storage and infiltration devices. Based on this, this work aims to evaluate the integrated effect of the application of permeable pavements and green roofs in the control of surface runoff using SWMM software for different combinations of coverage area and thickness of the underlying layers and to analyze the hydrological efficiency of different alternatives associated with the total cost of implantation. Results have shown the efficiency of the devices even for a more intense rainfall, besides alternatives with different occupancy rates and thickness, associated to a budget, that can be chosen according to the available possibilities of the area.