MODELO DE DECISÃO PARA DETERMINAÇÃO DE SISTEMA DE DRENAGEM URBANA SUSTENTÁVEL

Abstract

Changes in precipitation behavior occur over time. These changes in intensity and frequency affect the environment and society. Urban drainage systems must therefore be designed (or upgraded) to accommodate excessive rainfall and avoid threats of urban flooding. Sustainable Urban Drainage Systems (SUDS) are complements to drainage infrastructure that aim to minimize the impacts of hydrological changes and increase resilience to extreme rainfall events. In this sense, Decision Support Systems (DSS) become valuable aids for the adoption of SUDS, as they systematize the decision-making criteria. Multicriteria Analysis is considered an effective multivariate analysis tool that can improve the analytical rigor, transparency and auditability of the decision-making process. Thus, a Multi-Criteria Decision Model was developed that demonstrates which infrastructure is the most suitable for a given location, based on technical, social and economic criteria raised during the bibliometric review. The technical sub-criteria “soil permeability” and “groundwater level” proved to be decisive for the adoption of the listed SUDS practices. The application of the model in the study areas demonstrated that in locations where all SUDS practices can be used, the vegetated ditch stands out among the others, while the infiltration trench is further away from the ideal solution. In more restrictive locations, bioretention cells and green roofs stand out as solutions with the shortest distance to the ideal solution.