COMPARATIVO ENTRE OS COEFICIENTES DE ESCOAMENTO DE UM TELHADO CONVENCIOANL E UM TELHADO VERDE

Abstract

For years, big cities have been suffering from urban infrastructure problems, such as floods. The large volume of rain added to the small amount of permeable areas in cities has been bringing great harm to both the government and the citizens. One of the solutions to reduce surface runoff from precipitation is the replacement of conventional roofs by green roofs, consisting of a layer system, and which can also bring greater thermal comfort within the applied structures. The objective of this work was to analyze, in a comparative way, the effectiveness in decrease in runoff from the two roofs used, the conventional and the roof green. For this, two structures were built, which simulated two types of coverage, one conventional and another with vegetation, on which rains were simulated. carried out in the short term. According to the test results, it was possible to analyze a reduction of, on average, 40.65% in runoff from the use of the green roof, thus promoting a smaller drained volume. However, it was observed that the efficiency of system can be changed by rainfall time, the area to be studied and the thickness of the substrate layer.