LID Demonstration Project for Seaside Village in Bridgeport, Connecticut

摘要

This paper will describe a demonstration project of Bioretention systems for a small residential community in the south end of Bridgeport, Connecticut. This project has the residents of Seaside Village, the City of Bridgeport and the Urban Ecology and Design Laboratory (UEDLAB) at Yale University as the primary stakeholders. This author has provided technical expertise for this project. Seaside Village is a small cluster of brick single family residences located just north of Seaside Park in Bridgeport, CT. Approximately 300 acres of this section of Bridgeport consists of filled soils on top of old tidal marshes. The filling was done in the late 1700s. Due to the flat topography of the area, many of the residences experience flooding during some rainfall events. The purpose of this project is to demonstrate the effectiveness of Bioretention systems for infiltrating stormwater runoff and to encourage their construction within Seaside Village for the roof drains from the residents. The UEDLAB also wanted to use the demonstration project to look at specific design modifications of Bioretention systems, although no specific ideas were initially presented. Soil tests conducted on the site showed varying depth of earth fill on top of marine clays with peat, which were underlain by medium to coarse sand. In some of the demonstration cells, a sand wick will be installed through the clay/peat layer to the underlying sand layer to evaluate how this can improve the infiltrative capacity of the cell. Variable ponding depths and corresponding surface areas will be used to determine the most effective combination of design modifications for use within Seaside Village. The paper will present the results of the site investigation, the design methodologies used and the final design to be used for construction.