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Yes FreeDiver, they are making a mistake.
Its a practice that the early Samericans put into use to great effect - they supported millions by this method.
An 'open' Canal releases any heat made by friction of large amounts of moving water into open air, unlike a closed pipe. Anything bigger than the ones in Sydney for Sydney Water  tend to cause buckling.
The so called 'Greens' aren't real Greens - they're just another bunch of Polititians aren't they. Its not like they are really out there ...on the land. Hell, they wish to legalise Heroin. 
The transferance of water uphill (or through via tunnels) is by ducting systems - not to hard to do at all. Of course it would be hard to transport water up really steep inclines or gradients.

...since this idea came into effect 10 years ago, there hasn't been a better idea since to replace it. Maybe the fact that it is not an Anglo-Saxon idea, might be why it is not supported more so although those that do, seem to be the type of Farmers that are progressive and make a 'profit' efficiently and comfortably beyond the reach of oppressive CSIRO & Govt 'control'.
A lot of 'Political Australia' doesn't like things going on in Australia that might lead this country into a better future and 'Political Australia ...behind. So Political Australia makes sure everything is 'chained down' and with words like "If it ain't broke, don't fix it" - this Country slowly goes nowhere but into the slow death of stagnation. No offence Political Australia - but 'political australia' IS BROKE (starting with NSW).

Hope this helps.
Progressive thinking and practices and results is far better long term than short fixes of 'cash'. What good is cash when most just leave Australia and go overseas to spend it.
Instead of burning and back-burning huge amounts of land around people who cry foul for living in 'fire-prone' regions ...why not build 'Fire-Proof' Houses, etc? The Straw Bale House is possibly the most superior and cheapest form of housing. It takes a good 1/2 hour for fire to burn anywhere near 'through' the wall. But I guess the Building Industry prefers the Australian Public to buy more expensive and inferior materials and makes sure the Council's endorse such inadequate methods.
No - just quick fix cash and she'll be right mate.

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But it is the friction that is the problem, not the heat generated. A pipe is more than capable of dispersing enough heat to compensate for friction. Have you ever heard of a water pipe overheating due to fluid resistance?

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Buckling of what?

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Of course. Not sure what your point is though. No matter what happens, you only ever get to vote for a politician.

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LOL.

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Compared to pumping, it is absurdly difficult. Which is why the cost is so high.

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Are you saying people only thought to make canals 10 years ago?

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What exactly are you criticising now?

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Unless of course you throw pipes into the equation. Then it looks outdated and wasteful.

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Not to mention holes that leak all the water. Having a dig is the only sane way to approach canal building.

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I thought you were worried about friction related heat? Do you have any clue what you are talking about? How about you compare the actual losses of a pipe and an equivalent canal system.

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Crap.

freediver wrote on Aug 22^nd, 2010 at 11:59am:



What a pant load 

Food production holds a high level of strategic importance for any country and ensuring that capability remains is critical.

There is no-one so ignorant and yet so sure, as a city prong-head when talking about issues relating to regional areas and farming.

I did prove my Point FD, I mentioned the Canal System was based upon the 'early' Samericans who used smaller systems over vast expanses of land to 'irrigate' their crops to support a population that was x20 times as much as most other civilisations at the time.

During the night, moisture would rise up from the irrigation canals and water the crops via the process of 'dew'. It was subtle but effective form of watering the garden.

Having been around New Zealand a bit, they too use Irrigation Canal systems. But in NZ'ds case, they have a very natural and excellent waterway system that gives them quality water and irrigation.

Of course there is no 'actual' example upon such a large example of using such a Canal system. Mr Andrews in South Australia, turned his property into a wetland oasis from scub - for the benefit of both his stock and local wildlife, by using Canal systems. Sadly he was 'fined' hundreds of thousands of dollars, because he did something different and, besides successful, beyond the jurisdiction of the Governmental CSIRO. Seems the Australian Government cannot move into the future unless it is a UK-USA future, and only looks at anything domestically in the way of a possible 'fine'.
Its embarressing to see that the Opera House is the only 'uniquely Australian' thing to emerge in this country in its 200+ 'global' history.
The Big Barnacle on its Great Boring Land Mass.

If its about putting things up in this post, well my apologies, I'm not as computer savvy as you, besides being an excellent writer - but I can only state that this ain't vague ranting. The giant Canal system is a positive step into a better Australian future for the land. Take a look at some suburbs that are become self-sufficient in filtering their own water usage via 'aquifying' ponds. There is one north of Adelaide and another currently being built in NSW.

I would have thought, being a FreeDiver, you would jump in at the chance of having a paddle in the giant Canals?

When the global economy was looking a bit frazzled, the UK suffered considerably because it has basically dispensed with 'farming' as a major source of income for the nation. These days, the UK is primarily reliant upon Service Provider businesses.
Pretty sad really 

If 'Relief Packages' aren't the go during Drought/Flood & even Bushfire times ...which will always happen.
Then stand by progressive thinking, theories, acts and innovation, etc.
Don't just stand around and say "Can't do that or i'll fine ya"
...unless 'fines' are a form of future pay for the underprivaleged Australian?

Australia was once a giant Inland Sea ...its ripe for irrigation upon such a large scale.