Control of surface runoff at different scales in an urban community through event-based and continuous simulations
Keywords:
Urban drainage, Stormwater management, SWMM, Detention microreservoirs, Detention reservoirAbstract
Green and blue infrastructures integrate ecosystem-based measures into urban planning to mimic the natural water cycle, controlling runoff at its source and reducing peak flows. However, their implementation in consolidated urban communities can face challenges due to limited space and socioeconomic constraints, which hinder installation and maintenance. In this context, this study evaluated the performance of runoff control devices in the Grota do Cigano sub-basin (SBGC), an urban community in Maceió-AL, using SWMM to calibrate a hydrological-hydraulic model for the current scenario, which has a critical overflow point at its outlet, and simulating four intervention scenarios. In scenarios I and II, detention microrreservoirs (MRD) were simulated in residential lots, while in scenarios III and IV, detention reservoirs (RD) were simulated near the outlet. In scenarios I and III, the devices were sized based on the drainage channel capacity, whereas in scenarios II and IV, they were designed according to pre-urbanization flow rates. The RD proved to be more viable, effectively controlling runoff across the entire SBGC while occupying less space. Additionally, devices designed based on drainage channel capacity were more practical, balancing flow control efficiency with minimal space usage.
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