Last edited 26 Mar 2020


The SuDS Manual (C753) published by CIRIA in 2015, defines a pervious area as an:

Area of ground that allows infiltration of water, although some surface runoff may still occur.’

A pervious pavement is:

‘A surface that provides a pavement suitable for pedestrian and/or vehicular traffic while allowing rainwater to infiltrate through the surface and into the underlying structural layers

A pervious surface is:

'A surface that allows inflow of rainwater into the underlying construction or soil.'

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