Page 27 - LandscapeSA Issue 108

HYDROZONING

Hydrozone definitions

Hydrozone Summer Rainfall region Winter Rainfall region A landscape can have four main
Detailed Annualised Detailed Annualised hydrozones (hydrostations):
definition definition definition definition
No watering Receives less No watering Receives less high, moderate, low and a very
required unless in than 300 mm required unless in than 300 low water usage zone.
Very low/ extreme cases. effective extreme cases. mm effective
No
watering per watering per
annum. annum. Planting in these types of zones
• Summer - Receives • Winter - Receives an- can save 30% to 80% water
22mm/week. annual 12mm/week. nual effective
• Spring / effective • Spring / watering of usage. These zones must each
Autumn - watering of Autumn - between 300 - be watered individually and
7mm/week. between 300 7mm/week. 500 mm.
Low • Winter - - 500 mm. • Summer - have their own professionally
12mm every 12mm every designed and installed irrigation
second week second week
(including (including sprinkler types and their own
lawns but not lawns but not valve (whether manual or
if dormant). if dormant).
• Summer - Receives • Winter - Receives automatic). The concept can
15mm/week. between 500 15mm/week. between 500 - be applied regardless of the
• Spring / - 750 mm • Spring / 750 mm
Medium Autumn - effective Autumn - effective water source or how much
12mm/week. watering a 12mm/week. watering a water is available for use in the
• Winter - year. • Summer - year.
7mm/week. 7mm/week. landscape.

• Summer - Receives • Winter - Receives
25mm/week. over 900 mm 25mm/week. over 900 mm
• Spring / of annual • Spring / of annual
High Autumn - effective Autumn - effective
15mm/week. watering. 15mm/week. watering.
• Winter - • Summer -
12mm/week. 12mm/week.

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