Bio-retention basins are aesthetically valuable and at times recreational assets in new residential estates. As a result they have become a welcome new addition to any new landscape.
How Bio-retention works:
- Storm water captured in a bio-retention basin is controlled and treated by forcing it to slowly percolate through an engineered filter media
- It then passes the transition layer
- Finally passing through the gravel layer
Benedict Bio-retention Filter Media, M165, has been considered the industry benchmark for bio-retention media supply for many years. Its proven hydraulic conductivity, combined with high plant strike rate addresses both the engineering and horticultural requirements for a successful bio-retention filter media.
Developed to FAWB guidelines (2009) and in consultation with J Wyndham Prince Engineers, M165 is well accepted in the marketplace.
“ M165 has been specified on a significant number of bio-retention systems servicing urban development projects in Western Sydney since 2007. It seems to strike an ideal balance between maintaining excellent hydraulic conductivity over time and sustaining vigorous media bed vegetation growth, and consequently it has been our media of choice for these systems”. Peter Mehl from J. Wyndham Prince
The filter media (M165), transition layer (GTRANS) and drainage layer (5CRG) have been specifically engineered to work together to give a free draining, horticultural soil profile. All materials are externally tested through SESL for hydraulic conductivity and compliance with FAWB specifications. They have been selected with consideration for their bridging properties to assure particle migration does not occur between layers (avoiding fine particles blocking the drainage layer and restricting water movement into the agg line).
Where possible, Benedict have also utilised sustainable, recycled materials in their bio-retention profile. The Transition Layer (GTRANS) is made from 100% Washed GlassSand™!