To the average dog-walker, bird-watcher or picnicker, retention ponds are just part of the background. Sure, most people might know something about their usefulness or necessity, and some people might even appreciate them.
After all, a well-designed and maintained retention pond can be very pretty to look at.
But for those of us in the know, retention ponds are an integral part of stormwater management. There are a lot of ways to manage stormwater, but retention ponds, or, I should say, properly managed retention ponds, are a key part of stormwater management.
Operating as both storage for extra water from storms or snowmelt that can overwhelm urban infrastructure, and as a water quality treatment, the design can be fantastic.
There’s only one problem. If not properly designed or maintained (frequent problems when cities are dotted with retention ponds), there can be some pretty serious impacts on water quality.