- 21-10-2009, 11:24 #21
Re: Water Wars
Quote from the UN Water Org website http://www.unwater.org/statistics_res.html
Originally Posted by re-stilly
The total volume of water on Earth is about 1.4 billion km3. The volume of freshwater resources is around 35 million km3, or about 2.5 percent of the total volume.
Source: United Nations Environment Programme (UNEP)
Of these freshwater resources, about 24 million km3 or 70 percent is in the form of ice and permanent snow cover in mountainous regions, the Antarctic and Arctic regions.
So:
97.5% salt water
2.5% fresh
of which
1.75% is ice and snow
Leaving
0.75% for us!
(and most of that is locked up underground!)
- 21-10-2009, 11:25 #22
Re: Water Wars
Ahhh, but that balance will shift when the fossil fuels run out, so to have the infrastructure already in place to take advantage would surely be the right thing to do. Plus if water becomes scarce it will be worth more than gas and oil because lets face it we could survive without fossil fuels but without water you are very much up a dried up creak without a paddle.
Originally Posted by Jungelism
- 21-10-2009, 11:28 #23
Re: Water Wars
There was a very good BBC Hardtalk with a scientist whose name escapes me who argues that the only future energy source will be nuclear, as solar/wind etc are simply not sufficient for powering world economies. But who knows what the brainboxes will produce next...I like the Swedes burning "excess" rabbits for energy. The 70 stone man could fuel Nottingham for a month.
Originally Posted by Mr_Deputy
Edited to Add:
"so to have the infrastructure already in place to take advantage would surely be the right thing to do"
Yeah, but that involves the use of LOGIC in POLITICS. Not much of that kicking about :D
- 21-10-2009, 11:28 #24
Re: Water Wars
Taken from http://en.wikipedia.org/wiki/Desalination
Originally Posted by Mr_Deputy
"The Perth desalination plant is powered partially by renewable energy from the Emu Downs Wind Farm[20]. The Sydney plant will be powered entirely from renewable sources[21], thereby eliminating harmful greenhouse gas emissions to the environment, a common argument used against seawater desalination due to the energy requirements of the technology."
Wonder how expensive this is, though if they also made the wind turbines nationally they would be able to benefit there tooleonard to sheldon "sometimes your movements are so human i forget you're not a real boy" - Big bang theory
- 21-10-2009, 11:32 #25
Re: Water Wars
THe cost according to this report puts it at about $1 million a week (not sure if that is USD or AUD though)
Originally Posted by CountryGal
- 21-10-2009, 11:32 #26Senior Member

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Re: Water Wars
Oh, but we do. The private water companies piss millions of litres away every year and still manage to turn a whopping profit.
Originally Posted by Jungelism
If that money was spent on fixing the leaks then we'd have a swimming pool in every garden. Whether we liked it or not. :DWe need people who look to the stars, holding the nation and the world in their hearts but at the same time we need down-to-earth people who can do serious and trying work.
In a definite sense, a country's power and prestige isn't only a reflection of its economic power but also a reflection of its people's quality and morality. Moreover, I think the latter is actually more important in the long-term.
http://www.economist.com/blogs/multi...na_has_changed
- 21-10-2009, 11:32 #27
Re: Water Wars
Wales will become the new Kuwait
- 21-10-2009, 11:39 #28
Re: Water Wars
Aye, but its a little farther a stretch for (insert water desperate nation here) to claim that Wales is the 'olive branch that should be returned to the tree'. Wales doesn't even have olives.
Originally Posted by tropper66
Plus the 'mother of all battles' occurs annually during the Six Nations season.
- 21-10-2009, 11:45 #29
Re: Water Wars
Concentrated Solar Power is the big discussion in this area, providing lecky and clean water.
Originally Posted by CountryGal
http://en.wikipedia.org/wiki/Concentrated_Solar_Power
There are other low tech solutions such as the Seawater Greenhouse, designed by a Brit Company, which has had a modicum of success.
http://en.wikipedia.org/wiki/Seawater_Greenhouse
http://www.seawatergreenhouse.com/ (they've updated their website since I last looked.)
Solar Desal. can either be carried out in small or large scale. the plant in Aus is a good example of the large scale. But it may be more worth while to establish many smaller decentralised desal plants as it cuts down on the amount of pumping and pipe laying that is required (also means less will be lost through leakages).
http://www.solar-desalination.com/
To be effective in the long term, desalination projects will have to do a number of things:
1. Ensure there is sufficient water produced to support the populace c.100+ litres per person per day (factoring requirements for agriculture). Indeed there should be an excess of one thrid minimum.
2. Ensure a viable system of water conservation, including greywater reuse and more effective irrigation techniques (eg drip irrigation: http://en.wikipedia.org/wiki/Drip_irrigation ) is in place
3. Ensure that surplus excess is utilised to recharge traditional water sources such as underground aquifers, which would benifit the ecology by restoring traditional water levels and provide a safety net in case things go wrong.
4. Insure that dispersal of concentrated brine is spread across the largest area of ocean possible in order for it to difuse evenly in the ocean.
- 21-10-2009, 11:47 #30
Re: Water Wars
Sad but true.
Originally Posted by smartascarrots
Defra figures at http://www.defra.gov.uk/evidence/sta...wsupplyuse.htm
suggest that over 20% of all water is lost between source and tap. The companies operate at something called the 'Economic Level of Leakage', basically the point where the cost of digging up the road is outweighed by the savings in lost water. Good for the shareholders, I suppose.




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