Economic and Environmental Evaluation of Off-Site Mitigation of Stormwater Impacts

Abstract

While conventional stormwater management prioritized quick and consistent drainage using large infrastructure to prevent flooding, current practices have gradually shifted to be more in line with low-impact development strategies that emphasize mimicking pre-development hydrology. This transition has been challenging though, due to a regulatory structure that is centered around point sources and not easily adapted to fit stormwater runoff. This research aims to present an alternative management approach centered on markets for off-site mitigation of stormwater impacts. These markets, which would allow developers to offset their excess runoff by purchasing approved credits generated elsewhere, offer an opportunity to enhance stormwater management outcomes while providing developers greater flexibility.