ESTIMATIVA DE ESCOAMENTO PLUVIAL PRÉ URBANIZAÇÃO DE UMA BACIA PARA SUBSIDIAR PROJETOS DE DRENAGEM SUSTENTÁVEL E INFRAESTRUTURA VERDE

Abstract

Floods in urban centers tend to show greater frequency and magnitude driven by disordered urbanization, waterproofing of soils and an increase in intensity of rain events. Such events are potentially inducers of material, social and environmental damage. The adoption of conventional rainwater drainage systems only transfers the problem downstream. In contrast to traditional techniques, sustainable drainage techniques and green infrastructure are gaining ground, a set of devices and solutions that allows the management of drainage waters based on a conceptually different approach, favoring the reduction of surface runoff. In order to estimate the impacts of urbanization, it is necessary to establish the rainwater runoff regime in the pre-urbanization scenario to verify the maximum potential of retention of runoff from the basin and try to rescue the natural runoff conditions. This research will demonstrate the calculation steps necessary to survey the flow characteristics in the pre- urbanization scenario in the Tiburtino stream basin, located in the Lapa neighborhood, west of the city of São Paulo, which should be used as a basis to estimate the effects of urbanization on the natural terrain, as well as to assist in the search for a rapprochement with the natural conditions of flow of the terrain.