E2Designlab were engaged by City of Port Phillip to complete concept, detailed design and construction supervision for the Alma Park stormwater harvesting scheme.
E2Designlab worked closely with the Council to deliver all aspects of the project achieving the intent and vision for the park. This involved a strong emphasis on the landscape design complementing the engineering in a seamless way. Using local recycled wharf timbers combined with raingarden and treatment shed design have added new elements that have enhanced the park, making this a stormwater harvesting project that delivers many other benefits to its surrounds.
The design incorporates robust and highly maintainable infrastructure. A schematic showing the diversion arrangement, including buffer storage and pump well, biofilter treatment and storage of treated flows in underground tanks explains:
- Divert, pre-treat and transfer to raingarden
- Treat and Store
- Disinfect and Irrigate
The scheme produces 18ML per year to irrigate 3.5ha of sporting fields and parklands with about 80% reliability of supply (before switching over to potable mains water). It includes a 1 ML cast in-situ underground concrete storage tank and cost almost $2M AUD including irrigation upgrades and general landscaping. A background in operations, construction and rectifying existing stormwater harvesting systems informed the level of design and contract specification to ensure a quality build and compatibility with the council's operational resources.
