ESTUDO COMPARATIVO ENTRE OS SISTEMAS DE DRENAGEM CONVENCIONAL E SUSTENTÁVEL PARA UM LOTEAMENTO NO MUNICÍPIO DE GRAVATÁ-PE

Abstract

As a result of disorderly population growth, increased deforestation and pollution in recent years, cities are experiencing the great challenge of dealing with rain runoff problems. Due to the soil waterproofing, problems such as flooding and inundation resulting from natural events are increasingly frequent, and in addition to it, the lack of planning in cities. To solve this problem, it is necessary to use urban drainage elements that act efficiently in the capture and adequate conduction of rainwater, reducing the negative impacts on the population and the environment. In this context, the present study made a comparative analisys between conventional and sustainable drainage systems for a subdivision in Gravatá-PE. The conventional drainage system was dimensioned with the use of gutters, storm drains, manholes, detention reservoir and culverts. The sustainable drainage system, on the other hand, was designed with partial replacement of waterproofed coatings with green areas, use of interlocked pavements, hollow blocks, infiltration trenches and a detention reservoir with a permeable bed. The results showed that the increase in green area, in addition to providing environmental comfort, also contributed to the reduction of surface runoff, reducing the risk of floods and waterlogging. Besides, by providing greater infiltration of water into the soil, sustainable drainage showed savings in the use of devices. Therefore, the study showed that the adoption of sustainable measures, from the conception to the execution of the projects, can be the solution to the current problems faced regarding urban drainage.