Chapman's Green Street Stormwater Demonstration Garden, Portland, OR
N 45° 31.953 W 122° 42.297
10T E 523038 N 5042155
This demonstration garden provides education and science behind a stormwater or "rain" garden.
Waymark Code: WMGT6R
Location: Oregon, United States
Date Posted: 04/07/2013
Views: 7
This is a "rain garden", which collects the water that runs off of the land and from the streets and sidewalks, and filters the water thru the grasses, vegetation and ground in this low-lying area. It helps prevent at least a portion of the water and the pollutants from entering the stormwater drainage system, and from ending up in our rivers and waterways.
The system relies on a series of depressions in the earth to slow down the water, and when the water in the first depression (called a cell) becomes too high, it spills over into the next depression, and so on, and each step is intended to further reduce the amount of water and pollutants.
Part of the text from the information sign:
"Green Street Stormwater Facility
Portland's average rainfall of 37 inches a year generates about 20 billion gallons of stormwater runoff and, if not properly managed, washes pollution into rivers and streams, causing flooding and erosion, destroys habitat and contributs to combined sewer overflows (CSOs). The City of Portland promotes onsite surface stormwater management techniques that mimic natural conditions by capturing and filtering stormwater using soil and vegetation."
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