COMPARATIVE ANALYSIS IN THE REDUCTION AND RETARDATION OF SURFACE RUNOFF BETWEEN GREEN ROOF AND CONVENTIONAL ROOF

Abstract

Civil construction is one of the oldest activities, exemplified by the pyramids in Egypt, and is crucial for economic and social development. However, this activity intensively consumes natural resources, which makes sustainable development difficult. Disorderly urbanization and the increase in impermeable areas contribute to problems such as flooding in large Brazilian cities. A sustainable alternative is the adoption of green roofs, which consists of using soil and plants on the top of the building. This technique reduces rainwater runoff on public roads and networks, absorbing and draining rainwater, and can significantly reduce surface runoff. Aiming to address the green roof's ability to reduce surface runoff, in addition to delaying rainwater runoff. Two prototypes will be developed, one with a green roof and the other with a conventional roof. The experiment will feature two tests, one with the average daily rainfall throughout the year and the other with the highest daily rainfall, simulating the most critical situation over a period of one year in the city of Goianésia-GO. The prototypes in question have an area of ​​1.5m², therefore 19 and 104 liters of water are required to carry out these tests respectively, which will be distributed over a period of 60 minutes on both roofs. With the results obtained, a comparison will be made between the two types of roofs to demonstrate the effectiveness of the green roof in reducing and delaying surface runoff. Based on previous work, it is expected that the green roof will present a delay in surface runoff compared to the conventional roof, these results indicate that green roofs have the potential to reduce the impacts of surface runoff, which is fundamental for flood control and sustainable water management.