Challenges to the Design of Runoff Management Practices in Cold Climates (Source: Caraco and Claytor,1997)

Climatic Condition BMP Design Challenge
Cold Temperatures Pipe freezing

► Permanent pool ice covered ► Reduced biological activity ► Reduced oxygen levels during ice cover

► Reduced settling velocities
Deep Frost Line ► Frost heaving

► Reduced soil infiltration

► Pipe freezing
Short Growing Season ► Short time period to establish vegetation ► Different plant species appropriate to cold climates than moderate climates
Significant Snowfall ► High runoff volumes during snowmelt and rainon-snow

► High pollutant loads during spring melt ► Other impacts of road salt/deicers

► Snow management may affect BMP storage