The Planning and Design Code policies for stormwater management can be found under:
- Small-scale residential Part 3 – Overlays – Stormwater Management, PO 1.1, DTS/DPF 1.1
- Medium-scale residential Part 4 – Design in urban areas, water sensitive urban design, PO36.1 (stormwater runoff quality) and PO36.2 (flow and volume management).
Following is a guide on how the stormwater runoff quality and peak flow rate management requirements can be met for a range of scales of development.
Planning approval pathway and key policies for water sensitive urban design – May 2021
| Performance objective (PO) – Planning & Design Code | Council engineering requirement for performance assessed pathway |
|---|---|
| PO36.1: WSUD – stormwater runoff quality Residential development creating a common driveway/ access includes stormwater management systems that minimise the discharge of sediment, suspended solids, organic matter, nutrients, bacteria, litter and other contaminants to the stormwater system, watercourses or other water bodies. | Achieve the following minimum reductions in total pollutant load, compared with that in untreated stormwater runoff, from the developed part of the site: • Total suspended solids by 80% • Total phosphorus by 60% • Total nitrogen by 45% • Litter/gross pollutants by 90% |
| PO36.2: WSUD – stormwater runoff peak flow management Residential development creating a common driveway / access includes a stormwater management system designed to mitigate peak flows and manage the rate and duration of stormwater discharges from the site to ensure that the development does not increase the peak flows in downstream systems. | Contact your local Council as requirements vary |
SA water sensitive urban design policy (refer to page 11).