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SUSTAINABLE URBAN DRAINAGE - SuDS

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When rain falls in the natural environment, natural features such as trees, plants, grasses, earth along with rivers and streams; all help to process this water and this forms an integral part of the water cycle. In the built environment the normal stages of the water cycle are severely impeded. Problems resulting from this damaged cycle include flooding, pollution and issues of erosion. This water which cannot enter the natural water cycle puts additional strain on the sewer system. SuDS provide a natural approach to surface water management by creating a ‘mini water processing site’.

SuDS benefits:

• Natural traffic calming measures.

• Improve the micro-climate.

• Improve the air quality.

• Bring nature into the urban environment.

 

Images from Keep Cardiff Moving Consultation

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Images from Keep Cardiff Moving Consultation

Biodiverse bus shelters and Rain Gardens are examples of SuDS.

 

Biodiverse bus shelters

 

With a mixed variety of planting, not only do they support the reduction and slowing of water entering the drainage system, the entire roof of the bus shelter will create a habitat to support insects, other wildlife along with wide array of wild flowers.

 

Rain Gardens

 

These are usually a planted area with a variety of species, the plants perform several key functions; intercepting and cleaning both rainwater and surface water runoff. The reduced water volume either drains to a natural watercourse or the drainage system.

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