Rain Gardens of Scotland
Since 2011 Scotland has been working hard to improve the
quality of its waters. They established Scotland Environmental Protection Agency
(SEPA) as regulatory enforcement and
public educator regarding many forms of pollution, including water.
It was determined early on in the life of the agency that
staying with the simple pipe drainage systems would continue polluting the
waterways. And the waterways would become more polluted as population
increased. They came up with a multi-pronged plan of management and treatment that included public education and involvement. One of those prongs was the rain garden.
Rain gardens are part of Sustainable Urban Drainage Systems. Sets of practices, which focus on prevention and reduction of water pollution alongside water
harvesting, and constructed facilities include permeable surfaces, filters, swales,
detention systems, wetlands and ponds, and rain gardens.
What is a rain garden?
A rain garden is any plot of land having plant life designed
to receive rain water run-off from impermeable urban surfaces. The idea is that
the water is allowed to drain into the soil and become a part of the local
supply of groundwater, instead of being funneled out of the area by pipe
drainage systems. One of the best things about them is that scale from small
areas a home owner can beautify their property with to huge, regional plans.
Check the image to see how they work.
Are rain gardens unique to Scotland?
No. They are being used in England, Australia, and the
United States. The projects are supported by the public and are part of the
public water works.
What makes a rain garden sustainable?
Rain gardens are considered sustainable because they use
native plants and soils to preserve habitats for birds, butterfly, and insects.
Special soil is not needed as long as the native soil is permeable. When the
soil is not permeable enough to filter water it must be replaced with a mix typically
made up of 60% sand, 20% compost, and 20% topsoil. The mix will vary depending
on the location.
Rain gardens are not difficult to install, but are labor and
time intensive. Monetary costs will vary depending on available labor pools
(family, friends, helpful neighbors, or professionals) and sales on plants,
soil, and rocks.
Conclusion
Rain gardens do not solve all the water pollution problems
Scotland or any other area of the World has. They work in unison with proper legislation,
public education, and personal action.
To find information on how you can create a rain garden where you live, click here:
University of
California Agriculture and Natural Resources put this guide together.
And the City of Portland Oregon has this step by step guide here.
Wiki How: Rain garden in 15 steps.
Wiki How: Rain garden in 15 steps.
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Sources:
10,000 Rain
Gardens: https://www.greeninfrastructurescotland.org.uk/sites/default/files/Innovation%20Workshop%20-%20Rain%20Gardens.pdf
Rain Garden: https://en.wikipedia.org/wiki/Rain_garden
Scottish Green Infrastructure Forum: http://www.sgif.org.uk/
Scotland Environmental Protection Agency: https://www.sepa.org.uk/
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