One of the barriers cited to the implementation of green infrastructure is the lack of research surrounding its effectiveness. Although this may have been a valid complaint 10 years ago, there is now a significant body of research demonstrating the water quantity and quality control provided by green infrastructure technologies.
Review of the science and practice of stormwater infiltration in cold climates (2009). This review provides an updated summary of the body of knowledge on infiltration based stormwater management. Particular emphasis is placed on peer reviewed journal articles and published reports from jurisdictions with climate and soil conditions similar to Ontario, including the northeastern United States, United Kingdom, France, Norway, Sweden, Denmark, Germany, Austria, Switzerland and Japan.
Burnsville Stormwater Retrofit Study (2006). This study investigated two neighbourhoods in Burnsville, Minnesota, one of which was outfitted with 17 rain gardens and one of which was not. Stormwater runoff was measured in the adjacent neighbourhoods, and the area with the rain gardens had 89%-92% less runoff than the area without.
Evaluation of permeable pavements in cold climates (2012). Report of the Sustainable Technologies Evaluation Program at the Toronto Region Conservation Authority and the University of Guelph on the performance of permeable concrete and permeable interlocking concrete pavers at the Kortwright Centre parking lot. Permeable pavements were found to reduce virtually all surface runoff, slow peak flows, and reduce pollutant concentrations in stormwater that was not completely infiltrated into soils.
LID Stormwater Management Planning and Design Guide (2010). Techincal guidelines by TRCA and CVC for the effective installation of a variety of LID (green infrastructure) technologies, including rainwater harvesting, green roofs, downspout disconnection, soakaway pits, bioretention, and permeable baving.
Click here to download all the technical data and supporting research.