24 October 2014
 
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Storm Crates

storm water crates

The term attenuation means; to reduce the strength, intensity or size of something. Storm water attenuation is to reduce, weaken or slow down its potential flooding effect on the environment. The idea is to hold the storm water back during heavy rainfall and release it slowly back to the environment over a 24 hour period.

Designed to be stacked together to create a huge structural below ground holding tank or allow infiltration of storm water into the ground around them. This void can then fill up in heavy rainfall conditions and soak away slowly over a period of hours or days. This is known as storm water attenuation, extensive use of this type of system has helped relieve pressure on conventional surface water drainage systems. This is in line with the Sustainable Urban Drainage Systems (SUDS) program.

Sustainable Urban Drainage is an environmentally friendly way of dealing with surface water runoff which avoids the problems associated with conventional drainage practice. Conventional drainage exacerbates flooding, causes pollution and is generally more expensive to install and to maintain than Sustainable urban Drainage schemes. The Environment Agency in the UK advocates Sustainable Urban Drainage schemes because they do not contribute to flooding, they encourage wildlife and reduce pollution.

Sustainable Urban Drainage is an environmentally friendly way of dealing with surface water runoff which avoids the problems associated with conventional drainage practice. Conventional drainage exacerbates flooding, causes pollution and is generally more expensive to install and to maintain than Sustainable urban Drainage schemes. The Environment Agency in the UK advocates Sustainable Urban Drainage schemes because they do not contribute to flooding, they encourage wildlife and reduce pollution.

For more information, please visit the Environment Agency website.

storm water crates The storm water attenuation crates can be wrapped in a geotextile membrane which allows stored water to slowly seep into the surrounding ground.

A more common practice is to surround the crates with an impermeable Geomembrane to create a sealed underground tank. The outlet from this tank is then controlled to facilitate a slow release of the stored water back into the drainage system over a 24 hour (or longer) period.

We will be pleased to design a storm water attenuation system for you.

Author: Andrew Cotterill 

Cotterill Civils Blog 

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