Raingarden $930/m2 $50/m2 Industry less familiar with system requiring minimal ($340/m2 to construction techniques (greater infrastructure $1,690/m2) risk of poor translation of design at stormwater pollutant treatment and into on-ground practice) therefore require less land uptake to attain Depth of existing drainage may equal treatment performance compared to other limit soil filter layer depth and treatment measures therefore reduce treatment wetting and drying leads to more performance stable pollutant fixation of contaminants (such Site constraints (i.e. difficult to as, phosphorus and metals) in the soil filter implement well on slopes, layer location of existing services) are scalable and be designed at source as a garden bed or end-of-pipe as a basin of a saturates zone reduces the land uptake required to treat to best practice Tree pit $2,130/m2 $30/m2 Industry less familiar with system requiring minimal ($930/m2 to construction techniques (greater infrastructure $5,680/m2 ) risk of poor translation of design of streetscapes with shade from trees into on-ground practice) providing microclimate benefits of existing drainage may limit at stormwater pollutant treatment and soil filter layer and therefore therefore require less land uptake to attain reduce treatment performance equal treatment performance compared to other Site constraints (i.e. location of treatment measures existing services) wetting and drying leads to more stable pollutant fixation of contaminants (such as, phosphorus and metals) in the soil filter layer
Raingarden $930/m2 ($340/m2 to $1,690/m2) $50/m2 system requiring minimal infrastructure at stormwater pollutant treatment and therefore require less land uptake to attain equal treatment performance compared to other treatment measures wetting and drying leads to more stable pollutant fixation of contaminants (such as, phosphorus and metals) in the soil filter layer are scalable and be designed at source as a garden bed or end-of-pipe as a basin of a saturates zone reduces the land uptake required to treat to best practice Industry less familiar with construction techniques (greater risk of poor translation of design into on-ground practice) Depth of existing drainage may limit soil filter layer depth and therefore reduce treatment performance Site constraints (i.e. difficult to implement well on slopes, location of existing services) Tree pit $2,130/m2 ($930/m2 to $5,680/m2 ) $30/m2 system requiring minimal infrastructure of streetscapes with shade from trees providing microclimate benefits at stormwater pollutant treatment and therefore require less land uptake to attain equal treatment performance compared to other treatment measures wetting and drying leads to more stable pollutant fixation of contaminants (such as, phosphorus and metals) in the soil filter layer Industry less familiar with construction techniques (greater risk of poor translation of design into on-ground practice) of existing drainage may limit soil filter layer and therefore reduce treatment performance Site constraints (i.e. location of existing services)