Compensatory Techniques of Urban Drainage at Lot Scale: Contributions to Reducing the Overload on the Urban Stormwater System

contribuições para reduzir a sobrecarga do sistema pluvial urbano

Abstract

This research aims to investigate sustainable drainage compensation techniques at the lot scale, with the potential to reduce the overload on the public urban stormwater drainage system. Accelerated urbanization, coupled with the impermeabilization of surfaces and the increased frequency of extreme precipitation events, has intensified flooding in Brazilian cities, generating social, environmental, and economic losses. The research proposes integrating solutions such as green roofs, permeable pavements, rain gardens, and lot reservoirs, applied to an experimental scenario, comparing different permeability conditions. The study adopts the SCS (Soil Conservation Service) method to estimate surface runoff and quantify the efficiency of sustainable strategies in retaining and infiltrating rainwater. Partial results demonstrate that the adoption of these techniques significantly reduces the volume of surface runoff destined for the public system, highlighting the importance of decentralized urban water management. This work aims to contribute to the development of more resilient architectural and urban planning projects, capable of combining environmental performance and mitigating the impacts of climate change in Brazilian cities.

Keywords: Urban Drainage; Sustainability; Compensatory Techniques; Nature-based Solutions; Waterproofing.