Component: Other permeable surfaces




Other permeable surfaces can include:

  • Grass (if the area will not be trafficked)
  • Reinforced grass
  • Gravelled areas


The water passes through the surface to the permeable fill. This allows the storage, treatment, transport and infiltration of water.


Advantages and disadvantages



  • Reduced peak flows to watercourses reducing the risk of flooding downstream

  • Reduced effects of pollution in runoff on the environment

  • Reduced need for deep excavations for drainage, which can have significant cost benefits

  • Allows dual use of space, so no additional land take

  • Removes need for gully pots and manholes

  • Good community acceptability.


  • Cannot be used where large sediment loads may be washed/carried onto the surface

  • Risk of long term clogging and weed growth if poorly maintained

  • May have some load nearing considerations.








 SuDS - other permeble surfaces

Where component can be used

Residential:  Yes

Commercial/industrial:  Yes

High density:  Yes

Retrofit:  Yes

Contaminated sites:  Yes

Sites above vulnerable groundwater: Yes – if appropriate



Peak flow reduction:  Good

Volume reduction:  Good

Water quality treatment: Good

Amenity potential:  Poor

Ecology potential:  Poor


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