By using sustainable drainage methods at home, you can reduce the risk of surface water flooding.
Surface water flooding
Surface water is another word for rain that is collected by drains and gullies on your homes and gardens, before it goes into the sewer. Heavy rain can sometimes overwhelm drainage systems, and if not properly managed, can cause flooding of roads, gardens and even properties. Surface water can also wash away soil, and as it flows overland it can mix with other materials that pollute the local environment.
More and more traditional gardens are changing with more paved and decked areas being installed/built.. This is known as urban creep, where green areas change to grey. The number of front gardens that are completely paved over in the North West has increased from 4% in 2005 to 21% in 2015, usually to provide space for car parking. Back gardens are also reducing in size with new extensions and conservatories which may then be connected into surface water drains.
With a reduction in grassed areas, rainwater has nowhere to go which increases the amount of surface run-off and the speed at which it goes into to the sewer which can then cause flooding. We all like to make a difference, and one of the easiest ways is to think about how you manage your surface water.
Our ‘Slow the Flow’ garden shows you how you can use sustainable drainage at home
In July, we sponsored a very special show garden at RHS Tatton Flower Show created by garden designer John Everiss. Our Slow the Flow garden was designed to demonstrate ways to capture rainwater and slowly release it into the sewer system to reduce potential flooding problems.
The garden was designed in a way so that customers could recreate elements of it at home, and it proved very popular with visitors and judges alike – we even won Best Show garden and a Gold award.
Key areas of the garden:
Living roof with solar panel - a low maintenance grass roof which acts as a sponge during heavy rain allowing water to drain away slowly.
Stone catchment gully – built using boulders and pebbles, the gully travels across the garden catching water run off during heavy rain and channels into a water storage tank