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Showing posts with label water restrictions. Show all posts
Showing posts with label water restrictions. Show all posts

Sunday, 21 November 2010

Level-headed leadership – not logging and desal


In a time of crisis, common sense and strong leadership are vital. Victoria is facing a water crisis, yet the Labor government is failing on both counts.

The 2007 government decision to build a desalination plant at Wonthaggi short-circuited the community consultation process and by-passed cheaper, more sustainable water conservation methods, arriving at an expensive, inefficient and environmentally unsound solution.

Early in the crisis, common sense prevailed. The 2002 report, 21st Century Melbourne: A WaterSmart City, identified that an end to logging in Melbourne’s water supply catchments would yield, on average, an additional 20 gigalitres per annum. It makes sense when you think about it – new plants transpire more water than mature forest. Water yield drops by 50 percent, and returns to normal about 150 years later.

By October 2006, the government’s Central Region Sustainable Water Strategy was still on the right track, with plans to increase production of recycled water at sewerage plants, to increase water reuse and to improve the efficiency of water usage, storm water harvesting and rainwater tanks. Public comment was invited, submissions received and reviewed. An independent panel assessed the strategy and found it “to be an impressive first step towards rigorous and effective planning to ensure the long-term sustainability of water resources in the Central Region”, that region covering an arc around Melbourne.

Desalination was also recommended for consideration, but the panel expressly warned against “hasty decisions based on incomplete analysis”, fearing this would lead to wasted investment, lack of community support and adverse water resource and environmental outcomes.

Nine months later, without offering the public a glimpse of background analysis – complete or otherwise - the Labor government announced plans for the $3 billion (now closer to $5b) Wonthaggi Desalination Plant.

That was in June 2007 and debate still rages over many aspects of the desal plant’s development, not least the choice of location. Wonthaggi’s sewerage effluent outlet is located 3km from the desal intake, causing risk of contamination. Prevailing Bass Strait currents are being cleverly utilised to provide ‘fresh’ sea water to the intake and flush away the salinated output, except for those months every year when the currents reverse, short-circuiting the process and reducing plant efficiency.

To achieve the ‘carbon neutral’ label, the plant’s sizeable greenhouse gas emissions will be offset with the purchase of renewable energy – a cost passed on to the consumer in water charges.

The plant is being constructed by the private consortium AquaSure in a public-private partnership (PPP). In September this year it was revealed in Parliament that the PPP includes ‘water security payments’ to AquaSure, even if Melbourne’s reservoirs are high enough not to require desal production. That is, consumers will be paying for water that is not being produced, as fixed charges on their water bills.


A gantry offshore associated with the Wonthaggi desalination plant


Added to this, the normal privacy rules don't apply to PPPs, as they are not public agencies, and we have seen secret memoranda of understanding between police and the developers to share private information about potential protesters, and now spying on the workers on site - including passing on tax file numbers.

Over the past decade, the Labor government has had ample opportunity to show its true colours in a crisis, to demonstrate strong yet fair leadership and a level-head approach in dealing with water security. It began with a nod to preserving water catchments and making smarter use of the resources we already have. It ended with Victorians paying for water that may not even be produced, in a deal they were never asked about.

Wednesday, 7 April 2010

Water Wars

The State government has announced an easing of water restrictions. What a relief. I guess that must mean, in the run up to the election, that the water crisis is over.

Melbourne’s storage reserves have fallen from near 100% capacity in 1996 to 33.9% capacity in April 2010. According to the Victorian Department of Sustainability and Environment, within 10 years, climate change, continued population growth and drought could result in shortfalls of drinking water of approximately 100 billion litres per year for Melbourne alone.

And of course, there is no escaping the impact of the climate crisis on our water shortage. According to the Bureau of Meteorology, Victoria is now 1 degree hotter than it was in 1950. For each degree of temperature rise, we lose 15% of stream flow. We've now had 13 years hotter and drier than the long term average, and we've never had a run like this before. We are way out of our historical experience.

Faced with these challenges, the State government has
They have failed to offer the leadership we need in this crisis.

Premier Steve Bracks said on 13th November 2006, in the lead up to the last State election:

Recycling and conservation will secure Melbourne’s water supply ... The energy generation [of a desalination plant] is enormous, the intrusion on the community is enormous and, of course, it’s extraordinarily expensive ... really, what a hoax it is. We’re into long term solutions.


Despite this assurance, the Victorian government has committed to an unsustainable, high carbon intensive desalination plant. The Kilcunda desalination plant will produce 150 gigalitres per annum at a cost of over $4 billion and an additional 1.2 million tonnes of CO2 to Victoria’s annual greenhouse emissions. Water bills will double to pay for it.

Site of the proposed desalination plant at Kilcunda

For half of the cost of the plant, and a fraction of the carbon emissions, we could instead implement a 5 point plan for water:
  1. Stop logging Melbourne's water catchments. The cost of stopping this is just a few million dollars. Stopping logging now won't recover what we've lost, but will save us at least 15 gigalitres per annum in lost water between now and 2050, or enough water to fill 6000 Olympic-sized swimming pools every year.
  2. Introduce stormwater capture, treatment and use, saving 50 gigalitres of water, and even more with proper storage facilities.
  3. Upgrade the existing Eastern Treatment Plant to Class A water, giving us an additional 72 gigalitres per annum
  4. Government replacement of existing single flush toilets in Melbourne with dual flush, saving 15 gigalitres per annum
  5. Introduce a 50% subsidy on water tanks, saving 25 gigalitres each year.
Rather than using the same kind of energy intensive solutions that got us into this mess in the first place, why don’t we try to be smart, innovative and sustainable, so Melbourne has enough water for the future, and doesn’t suck the rest of the State dry?

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