living water smart in alice - depws.nt.gov.au
TRANSCRIPT
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Living Water Smart in Alice
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The challenges we face
Entrenched water hungry customers
• High proportion renters and others not paying water bills directly
• No millennium drought• Relatively high pressure and TDS
Hard place to have a garden
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Alice Springs • 28,000 serviced population – top 3 in Australia
• Avg annual water and sewerage bill $1950 ($800 sewerage, $300 Connection, $850 water)
• Last 5 yrs AS avg total water supplied 7.6GL (previous 5yrs 8.2GL)
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Avg Residential Water Supplied 2016-17 (kL/property)
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Avg Annual Residential Water Supplied (kL/property)
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Water Efficiency – Every one knows…
• Native plants good• Front loader washing machines good• Drippers good• Irrigating in day time bad• Reducing lawn is good• Water tanks good• Mulch is good• Short showers good• Pools bad• Teenagers bad• Dual-flush toilets good
• Native plants good
• Front loader washing machines good
• Drippers good
• Irrigating in day time bad
• Reducing lawn is good
• Water tanks good
• Mulch is good
• Short showers good
• Pools bad
• Teenagers bad
• Dual-flush toilets good
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Demand Management in Alice
11%
7%
4%
3%
4%
4%
11%
56%
Shower (11%)
Air conditioner (7%)
Toilet (4%)
Washing machine (3%)
Indoor other (4%)
Pool (4%)
Leaks (11%)
Garden (56%)
Gardens, 56% Leaks, 25% Bathrooms, 12% Evap. AC, 4% Pools, 2% Laundries, 1% Kitchens, <1%
Alice Water Smart survey data (2013)• 6% knew the current price of water in Alice Springs• 2% knew that there was approximately 300-400
years of water supply left in Alice Springs’ current water supply aquifer
Commercial21%
Govt23%
Residential56%
Alice Springs Sector Use(Total - 8,300ML)
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Irrigation
Seasonally adjust :Lawns = 25 to 40mm/wk, water 10 to 20mm twice as week in summer but only 10 to 20mm twice a month in winter
Holds true for most other plant types
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Irrigation pt. 2
• Water longer less often
• Handle the pressure
• Walk the lines
• Pick the right plants, mulch, water after dark
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Leaks
• In Alice Water Smart 1 in 3 houses found to have a leak of approx. 240kL/annum or 80kL/house
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Looking forward and looking back
• Water efficient standards for new dwellings, schools, parks
• Policy to make water efficiency BAU
• Water Sensitive Urban Design
• Irrigator certification
• Rebates and retrofits
• Audits of high users
• Behaviour change program
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What we’re doing in Darwin
Confidence in achieving targets:
• Strong government savings component in program
• Monthly reporting, annual review, climate corrected production monitoring
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Does it work?…
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Summary
• DM in Alice doesn’t have to be hard work
• Technology has come a long way and is very promising
• Regional and sector specific
• 40 water meters use almost 25% of all water supplied
• Irrigation and leaks low hanging fruit
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