Local climate projections were one of the drivers for CVC’s LID monitoring that led to the monitoring of Elm Drive; given the local climate projections of increasing precipitation events and the risks (to infrastructure, people and ecosystems) associated with increasing surface runoff (e.g., water quality concerns and erosion), the stormwater management retrofit was designed to capture stormwater runoff and convey it through permeable pavers and bioretention planters before discharging any remaining runoff to the existing storm sewer system.
The Elm Drive low impact development (LID) road retrofit, necessitated by water flow and drainage issues, is located on Elm Drive West, just south of the Square One Shopping Centre in Mississauga, Ontario. This project involved a partnership between three stakeholders, including the City of Mississauga, the Peel District School Board (PDSB), and the Credit Valley Conservation (CVC). The area is experiencing the climatic impacts related to extreme precipitation. Water drainage and flow patterns are changing and increasing areas of impervious surfaces are impacting the inflow and infiltration of precipitation. This compelled the development of alternative stormwater management techniques (e.g., bioretention and permeable pavement). The Elm Drive project incorporates both permeable paver lay-bys within the road right of way (on City of Mississauga property) and bioretention planters on the adjoining property owned by the Peel District School Board (PDSB). Runoff flows from Elm Drive West onto the permeable paver lay-by and into the bioretention planters. Preliminary monitoring indicates that LID features are performing well.