Using Green Infrastructure to Minimize Combined Sewer Overflows

Abstract

This project addresses the problems posed by combined sewer systems in high-density urban environments, and aims to minimize combined sewer overflows through an innovative green infrastructure solution. In order to identify the best solution, bioretention basins, green roofs, and permeable pavement were analyzed according to the following criteria: runoff volume reduction, peak flowrate reduction, pollutant treatment rates, greenhouse gas emissions contribution, cost effectiveness, and implementation feasibility. Bioretention basins were found to perform best in almost all criteria considered. Thus, implementation of bioretention basins is the proposed solution. Bioretention has significant potential in cost savings, as well as positive impact on the local economy, and environmental and social benefits.