Contribuição da cobertura de telhado verde no município de São Paulo para a regularização do nível do reservatório de Itumbiara

Abstract

The untidy urban growth and the little concern with the use and occupation of the soil, allied to problems such as the heat islands, damage the quality of life of Brazilian citizens. In the XXI century, the use of techniques that are less aggressive to the environment for sustainable development becomes more prevalent. The green roof has been used and disseminated more and more because it is a structure that uses vegetation in its composition and is pointed out by several authors as beneficial to the environment. Also, its use appears as an alternative to reduce the ambient temperature and a tool to achieve thermal comfort. Due to climatic changes, the demand for artificial conditioning, with the intuition of maintaining thermal comfort, tends to be more and more usual and growing. In recent years, the São Paulo macro-metropolis has suffered from the water and energy crisis, which has increased the interest in plans that will mitigate these problems. In order to minimize this water and energy situation, the work evaluates the energy savings that could be achieved with the green roof in every roof area of the households available in the city of São Paulo. The savings come from the thermal comfort generated by such vegetated cover and the non-use of equipment for cooling and heating the internal environment. It was found in an intermediate scenario and from the applied methodology that it is possible to save in one year with air conditioning of the reverse type in electricity to the order of 2434 TW with heating and 303 TW with cooling to maintain the internal environment at constant temperature 24ºC, equivalent to 5.70 and 0.71 meters of the saved water column, respectively. Considering an average area of 750 km² of the Itumbiara reservoir, it is clear that the volume of water collected is significant.