The TREENET Inlet system is an emerging WSUD tool which harvests road runoff from residential streets and arterial roads to irrigate street trees. By intercepting the ‘first flush’ of stormwater, TREENET Inlets remove pollutants near their source and promote biosequestration of nutrients such as phosphorus and nitrogen that might otherwise cause algal blooms in receiving waters downstream . TREENET Inlets are installed in the kerb; they connect to an infiltration trench or ‘leaky well’ which detains the water until it soaks into the soil in the nature strip. By placing this water in the soil profile at a distance from the tree (ideally midway between two street trees) a moisture gradient is set up whereby root development is toward the source and away from other hard infrastructure. Trees are then able to redistribute this water to other drier locations in the root zone by a process known as hydraulic lift. This reconstructed root array also creates biopores through seasonal growth of finer absorption roots thus increasing the natural permeability of the verge profile.
R750 Treenet Inlet Model Specification
Expressions of Interest (EOI) are invited from councils wishing to partner with Space Down Under in a sustainable stormwater harvesting research and development project. Space down Under is dedicated to research and development of the TREENET kerb side inlet and site-specific verge infiltration zones for healthy tree growth in the urban environment.
• Kerb anchor block
• R 750 stainless steel faceplate
• M8 × 30 mm stainless steel cap bolts
• 100×50×90 mm PVC coupling