EVALUACIÓN DEL IMPACTO DE TECHOS VERDES EN LA REDUCCIÓN DE SECTORES CONFLICTIVOS DE INUNDACIÓN EN LA REGIÓN CENTRAL DE CHILE

Abstract

The development of Chile in terms of population growth and urbanization during the last two decades has meant that many of drainage and evacuation of rains systems have become obsolete. Particularly, many of the cities of the central region present numerous conflictive sectors that are flooded during the winter rains. On the other hand, the lack of green spaces in cities leads to complications related to biodiversity loss, increased temperatures, greater energy demand, impermeability, etc. In this sense, the green roofs are valued as an element of mitigation of climate change and they can reduce the surface runoff flow rate in cities. This work proposes the installation of green roofs as a partial solution to the problem. The methodology includes the identification of conflicting sectors in a case study (Curicó), the construction of the hydrological model by means of a specialized software (SWMM), the addition to the model of green surfaces in different points and the computational simulation, in order to determine the viability of the method to avoid floods. The final results show the percentage of cover necessary for the runoff reduction to be sufficient to avoid flooding.