Understanding SuDS and permeable driveways
SuDS stands for Sustainable Drainage Systems and is a catch-all for anything that relates to the effective drainage of surface water while minimising pollution and the impact on local drainage services.
It can relate to management practices, building materials and new development design.
The need for this legislation has arisen partly because of recent heavy rainfall and also the gradual erosion of natural habitats that would have historically helped to reduce the flooding that occurred due to the rain. Put simply, the increase of paved areas has prevented the natural absorption of storm water into the water table and instead water has flowed at great speed into watercourses, taking all forms of pollution with it.
SuDs tries to emulate a natural drainage system in several ways
The adoption of SuDS in many areas has allowed for new developments where existing sewerage systems are close to capacity.
The impact for you and your driveway is that you have to provide adequate drainage that doesn’t result in water running out of your property and into a public highway or into a local sewer.
New Driveway Permeable Driveways:
All New Driveway Company installations comply with SuDS regulations in one of three ways:
The sub-base layer is intended to act as a reservoir, to provide storage for collected surface water and to release it to the natural environment at a controlled rate.
The simplest model involves water accumulating within the sub-base from where it slowly seeps into the ground beneath. This is shown below:
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