In Seaberry Creek Park, stormwater flows slowly through alternating bands of deep and shallow wetland, separated by striking curved rock gabion weirs and surrounded by ephemeral wetland. After rain, the 23-million litre wetland is designed to fill and empty slowly over 72 hours, giving the wetland plants time to remove pollutants. The wetland includes over 19,000 plants.

“Rain gardens” planted with selected wetland species are located in every street, acting as natural filters for stormwater, as well as beautifying Seagrove’s streetscapes.

4,500 litre rain water tanks connected to toilets and a garden tap in every home are projected to save over 10 million litres of drinking water every year as well as reducing the amount of stormwater entering the bay.

Seagrove’s integrated stormwater treatment measures have been designed using computer modelling. They are projected to reduce pollution entering the bay each year by 22.7 tonnes of suspended solids, 39.2kg of phosphorous, 204kg of nitrogen and 6.5 tonnes of gross pollutants.