Qualitative and Quantitative Evaluation of Stormwater Infiltration Structures in An Urban Basin. Case Study: District of Campeche, Florianópolis-Sc (PAP014422)

Código

PAP014422

Autores

Elisa Ferreira Pacheco, ALEXANDRA RODRIGUES FINOTTI

Tema

Urban Floods

Resumo

The use of compensatory infiltration-based techniques for control of urban drainage should include a careful evaluation of the quality of infiltrated water in order to prevent the pollution of soil and groundwater. Pollution in stormwater can reach significant levels, and it cannot be ignored when it comes down to the quality of the receiving medium. The main objective of this paper was to develop a selection methodology to quali-quantitatively characterize rainwater infiltration structures used in an urban basin for future monitoring and instrumentation. The study was conducted in three stages. First, the most relevant infiltration structures were selected using the Geographic Information Systems (GIS) as a tool, together with hydrological models. Next, stormwater was qualitatively diagnosed and, finally, an infiltration ditch and an infiltration pit were characterized. This research study was conducted in the city of Florianópolis, Santa Catarina, Brazil. The methodological procedures consisted of a literature review, the physical characterization of the structures and the infiltration basin, and modeling of the basin based on physical and land use characteristics, by means of map databases provided by the municipality and the satellite images made available from the Corporate GIS project. The Quantungis 8.0 software was used for selection of stormwater infiltration structures. Qualitative analyses were performed at the Integrated Environment Laboratory (LIMA), Sanitary and Environmental Engineering Department at the Federal University of Santa Catarina. The main contribution of this study is the methodology which included field work, computational modeling and qualitative characterization of stormwater runoff and infiltration structures, thus helping decision makers employ stormwater infiltration structures based on scientific and technical criteria.