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JOHN ALLAN A B C D P1 S2 S1 S3 P2 P3 P4 P2 P1 S1 S3 S2 P3 P4 KAUAROA CASCADES WAIHEKE ISLAND A B C D Stormwater, collected from roads and detention tank overflow, is directed through vegetated strips in the centre of retaining walls Kahikatea specimens line the central channel Water runoff from green roofs is held in detention tanks that are available to residents for use as non-potable water, while overflow re-enters the treatment train Cleaned water provides amenity value for users of the central public space Retaining wall strips vegetated with drifts of oioi Water from vegetated strips is directed through a central channel into a vegetated wetland with a variable cell arrangement, then cascades down a series of waterfalls Water is slowed and sediment accumulates around a series of islands in the constructed pond system, planted with a mixture of kukuraho (club rush), blue coastal sedge, and oioi. Water exits the system to Kauaroa Bay via a channel adjacent the terraced public space
