What is a Rain Garden? A rain garden is an intentional low spot, or depression designed to collect rainwater runoff. Rainwater runoff occurs when rain lands on surfaces like parking lots, driveways, roofs, or even compacted lawns that can not be absorb by the land.
Why collect rainwater runoff? Collecting rainwater runoff prevents water from flowing directly into open water bodies or flowing directly into storm drains. It allows the water to soak back into the ground reducing erosion, water pollution, flooding, and allows for groundwater to be replenished.
Why does it matter? Often rainwater runoff is contaminated with chemicals from vehicles leaking onto asphalt, road salt, and even chemicals on lawns. Many roads and storm drains are designed to remove runoff quickly, sending it directly to the closest water body with out removing these chemicals first. These chemicals are impacting water quality for people as well as the environment.Another form of contamination is sediment collected along the way which can accumulate in streams and ponds.
How does rainwater runoff affect drinking water? When rainwater rushes off to the closest water body it does not have a chance to be absorbed back into the land. Water absorption is one of the ways drinking water is replenished. If the contaminated runoff goes right into a drinking reservoir, this can cause trouble as well.
Are rain gardens easy to install? Yes, with some simple planning, rain gardens can be designed and installed for homeowners, businesses, and municipal landscapes.
Check out this video about rain garden installation: