Urban stormwater is rain that falls over urban and suburban areas, or any place with a large percent cover of impervious surfaces such as roads, parking lots, and roofs. The management of this water is an increasingly critical interest for developers, designers, and municipalities who are facing increasing ecological and political pressure to maintain pre-development site hydrology. This site is intended as a resource for anyone seeking information about different stormwater solutions.
Why is what we do with urban stormwater important?
Natural areas with abundant soil, trees, grasslands or wetlands can easily absorb water from most rain events. As these natural areas are developed in to cities and towns, the water-absorbing elements are compromised. Trees are felled, and soil-rich areas are paved with impermeable surfaces. Water has nowhere to go.
Due to an abundance of impervious surface area, a small rain event can easily become a big deal in a city. Little rainfall is absorbed; instead it flows across paving, picking up oils, pesticides, fertilizers, animal waste, and other pollutants as it goes.