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.
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