What is the basic design theory underlying soakaway design?
The basic theory of Soakaway design follows the formula shown below… Storage = Inflow – Outflow Where, Storage = the amount of water that can be stored within the Soakaway. Inflow = the total defined runoff from the impermeable area (taking into account the volumetric runoff coefficient and any deduction for filter trench design, see above). Outflow = (surface area of exfiltration) x (soil infiltration rate) x (storm duration). Full details of our design methodology can be found in the Help files here.
