P1
P2
P3
P4
KAUAROA CASCADES
WAIHEKE ISLAND
P1
D
S1 P2
Kahikatea specimens line the central channel
S3
C
Retaining wall strips vegetated with drifts of oioi
S2 S1
P3
B A P4
JOHN ALLAN
A B C D
Stormwater, collected from roads and detention tank overflow, is directed through vegetated strips in the centre of retaining walls
S2
S3
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
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