Partial Infiltration
- Conventional Block Paving
- Permeable Paving
- Sustainable Urban Drainage Systems
- Total Infiltration
- Partial Infiltration
- Non Infiltration or Tanked
- Permeable Sub-Base Replacement Systems
- Rainwater Harvesting
- Further Information
- New Government Legislation
- Pack Information
Similar to Total Infiltration, Partial
Infiltration Systems may be used in situations where the existing sub-grade may
not be capable of absorbing all the water. This system can, therefore, prevent
the sub-grade from becoming water logged and losing its stability.
In this system Permi.8 paving sits on
top of a permeable sub-base which surrounds a perforated outlet pipe which allows
the excess water to be drained to other drainage outlets such as sewers, swales
or watercourses.
Whilst a high proportion of the rainfall is allowed to infiltrate through the system into the sub-grade, the excess is discharged with a peak discharge rate that is agreed with the Local Authority or Environmental Agency.