Estudo comparativo entre soluções de retenção de águas pluviais em habitações de interesse social em Manaus/AM

Abstract

In Manaus, in the context of urban drainage and environmental protection, a peculiar phenomenon is observed: the limited enforcement of existing regulations. Although legislation for controlling stormwater runoff has been in place since 2007, its implementation is constrained, particularly in areas designated for social housing. Consequently, this study was conducted through descriptive-exploratory research to analyze the implementation of Vertical Tube Reservoirs (VTR) and Retention Reservoirs as solutions for retaining stormwater in social housing. The research identified deficiencies based on selected criteria, pointing to the need for improvements in the design, operation, and maintenance of existing systems. The VTR demonstrated a 26 % reduction in stormwater runoff, with the potential to enable non-potable uses through system modifications. However, its associated costs, coupled with lower retention volumes and the socio-economic condition of residents, may pose challenges to achieving maximum efficiency. On the other hand, the Retention Reservoir stood out for its significant attenuation capacity, retaining up to 72 % of volumes generated by intense rainfall events in Manaus. Despite requiring a larger area for implementation, this system offered notable advantages, including a more affordable cost for expanding its retention capacities. These results suggest that the Retention Reservoir may be a more suitable solution to address stormwater retention challenges in social housing in the city of Manaus, thereby promoting more effective urban drainage management and environmental resilience.