Avaliação da influência de pavimentos permeáveis no amortecimento de vazões de escoamento de águas pluviais em um condomínio em Curitiba - PR

Abstract

In recent years there has been an increase in the intensity and frequency of extreme natural events that cause social, environmental and economic damages. Floods are among the most striking natural disasters. With the increase of urbanization, there is an expansion of impervious surface area, and therefore a greater surface runoff is generated. As a type of storm water management option, permeable pavements are unconventional measures of on-site water retention. This technology allows infiltration to be added within streets and plots of land, reducing the amount of water drained to the public urban drainage system, or at least slowing down the peak flow. The present work used surface runoff coefficients and other parameters of the literature to calculate runoff flows in a residential condominium in Curitiba, adopting permeable pavements instead of conventional pavements. Using the rational method flow values for surface runoff were calculated for different slopes, degrees of clogging and types of pavements. Eleven percent less drainage flow than conventional pavements was obtained in the worst case, and 94% lower in newly constructed permeable pavements. A brief study was also carried out on the design of the permeable pavements layers according to the minimum values recommended by NBR16416: 2015.