ATTENUATION

Utilising Attenuation as a SuDS technique

The Geocellular system is used to control, store and manage rainwater surface runoff. Its flexible nature means that attenuation tanks using geocellular modules are lightweight and easy to install. The system can be installed in both traffic and non-trafficked areas and is capable of providing high storage volume capacity and managing high flow events.

The Four Stages of Attenuation

1. Attenuation Stage 1: 
   Stormwater flows into a silt trap (or catchpit) to catch debris, improve water quality & prevent blockages further in the system.
2. Attenuation Stage 2:
   The filtered stormwater enters the pre-built geocellular crate system at a size that will hold the required level of stormwater.
3. Attenuation Stage 3:
   Stormwater is held in the tank which is wrapped in an impermeable membrane liner - this can be purchased by the roll or as a pre-built shoebox
4. Attenuation Stage 4:
   A flow control chamber then manages the discharge rate of stormwater into the main surface water drainage network.

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