Análise da influência de técnicas compensatórias de drenagem na bacia hidrográfica PA BD 47

Abstract

The rapid urban growth, a result of population increase, impacts various socio-economic and environmental sectors. This study focuses on the infrastructure impacts, especially in urban drainage. Urbanization generates extensive impermeable areas, causing increased surface runoff, resulting in recurrent floods. The objective of this study was to evaluate the efficiency of compensatory drainage methods in mitigating surface runoff by comparing the flow in the final conduit of a watershed without the implementation of these methods and with their implementation. The chosen compensatory methods were green roofs, infiltration trenches and permeable pavement. The watershed developed was PA BD 47, which is located in the center of Juiz de Fora, a highly urbanized area. Watershed data were generated using the QGIS program, including the occupied area of each method. The SWMM software (Storm Water Management Model) from the EPA was used for data analysis, examining methods applied individually, all together and in different combinations. After analyzing of the results, it was observed that, although the reductions in average flows were not highly significant, there was a considerable reduction in maximum flows when compensatory methods were applied. The combination of green roofs with permeable pavements showed greater efficiency, followed by the individual use of permeable pavements. Therefore, it is concluded that compensatory drainage methods are solutions that can be used even in highly urbanized watersheds, contributing to the urban drainage system.