Springfield – Horizon Dr

Springfield – Horizon Dr
Biobasins are designed essentially as a large filtration system for water running off the estate, before it enters waterways such as creeks and rivers. This is achieved by creating a catchment and filtering the water through several layers of filter sand and plants on top.
  • Excavate each basin to correct size and depth
  • Lay impermeable matting along base to prevent water loss
  • Dig trenches and lay pipes for the water to flow down through the sand and then into storm water outlets
  • Refill basin with sand (2 layers, 100mm transition layer followed by 600mm filter media) and plant through top layer of sand
  • Coir fitted to batters for stabilisation and on basin floor to prevent wash and gouging in high flow areas
  • Rock armour installed upstream to add in filtration and prevent gouging