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 Post subject: Re: Ogallala Aquifer
PostPosted: Apr 29, 2014 7:03 am 
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The most recent year for which I can easily find figures for is 2007, when ~23 cubic kilometres of water was withdrawn from the Aquifer.

That is 23 billion cubic metres of water - desalination in Israel is now roughly ~55 cents per cubic metre and still falling, and if we assume nuclear desal can match that on a titanic scale the value of that water is roughly $12.6bn dollars.
Projections in the dropping price of RO indicate that 35 cents per cubic metre might be viable at some point - reducing the cost of the water provision to $8.05bn

The economic benefits of the aquifer is huge, easily above ten billion dollars and probably far larger than that.

It all depends on how cheaply the water can be piped to the Great Plains - remember that water is fungible so use of desalinated water elsewhere might free additional reserves from rivers that flow through the Southern High Plains region - reducing the need for pumping.

Still it doesn't seem to be as ridiculous an idea as people claim.

EDIT:

Last tender was 52 cents per cubic metre with a breakdown of 25 cents for capital cost and 27 cents for energy with a specific energy requierment of 3.5kWh(e) per cubic metre of produced water.

If we used night time generation we could probably cut it to ~35 cents with current technology but that would require huge buffer lakes for the diurnal cycling.


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 Post subject: Re: Ogallala Aquifer
PostPosted: Apr 29, 2014 7:18 pm 
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Location: Idaho Falls, Idaho
Still it might be cheaper to pump fresh water from Canada or the great lakes using LFTR electric power.


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 Post subject: Re: Ogallala Aquifer
PostPosted: Apr 30, 2014 3:39 am 
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The sea water will not only have to be desalinated but also pumped to the mid-continent, thousands of feet up. If Canadians can sell a cubic meter of water with a liter of oil, it should be a good deal including the Keystone pipeline. Let them run the terrestrial nuclear power.


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 Post subject: Re: Ogallala Aquifer
PostPosted: Apr 30, 2014 5:59 am 
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Not necessarily.

Water withdrawn from the appropriate rivers in coastal areas would be the first to be replaced - allowing that water to be withdrawn further upstream.


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 Post subject: Re: Ogallala Aquifer
PostPosted: Apr 30, 2014 11:14 am 
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Location: Cleveland, OH
The North America Water And Power project was/is proposed for diverting some of the ocean-bound river water from Alaska & the Canadian Yukon territory down to the U.S. and to Mexico: http://www.schillerinstitute.org/economy/phys_econ/phys_econ_nawapa_1983.html and http://larouchepac.com/nawapa-overview is more recent I believe. It is a huge, breathtaking, imaginative mega project, and doubtful to get past the US EPA <heavy sarcasm>. We would have better odds of putting a local LFTR in every US area code.


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 Post subject: Re: Ogallala Aquifer
PostPosted: May 05, 2014 3:31 pm 
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Location: Oregon
The Lions share of the Ogallala Aquifer is located under Nebraska. They have built huge dams in North and South Dakota to control the flooding from the winter run off. Why not punch holes in Southern South Dakota and divert this water to the aquifer. By using this they may not have to dump water into the river and cause the huge floods they get when they guess wrong and have to dump a lot. The whole water management is crazy, but that's a different issue. The runoff that normally goes to the Gulf in the run off would fill the aquifer first.


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 Post subject: Re: Ogallala Aquifer
PostPosted: May 05, 2014 7:37 pm 
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BobN wrote:
The Lions share of the Ogallala Aquifer is located under Nebraska. They have built huge dams in North and South Dakota to control the flooding from the winter run off. Why not punch holes in Southern South Dakota and divert this water to the aquifer. By using this they may not have to dump water into the river and cause the huge floods they get when they guess wrong and have to dump a lot. The whole water management is crazy, but that's a different issue. The runoff that normally goes to the Gulf in the run off would fill the aquifer first.


The Mississippi flows 7000-20000 m3/s, and 1e4 m3/s is about 315 km3/yr. Just a tenth part of the river could cancel out the current use of the aquifer and recharge it at 50%- returning all the water ever taken in around 30 years. It seems a lot simpler to pump river water a modest distance and height, than to desalinate ocean water then pump it great distances to great heights.

Near where I work in the Antelope Valley of the Mojave Desert, the Palmdale Water District is working on a system to recharge their groundwater by diverting runoff from the north side of the San Gabriel mountains into porous basins, rather than let it run further to the dry lake beds. There's quite a lot of precipitation in the mountains, it simply must be conserved rather than being allowed to evaporate uselessly.

Current demand in the AV is around 170,000 acre-ft/yr (yes gawdawful units, but that's what they routinely use), but the local watershed can provide over 100,000 AF/yr, and all of it simply evaporates because the AV has no outlet.

I'm often annoyed at the reduce /reuse/recycle mantra, but in many cases it makes sense.

http:\\www.water.ca.gov\lgagrant\docs\applications\Palmdale Water District (201209870039)\Att04_LGA12_PWD_ProjD_1of5.pdf


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 Post subject: Re: Ogallala Aquifer
PostPosted: May 06, 2014 7:52 pm 
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Rocketplumber wrote:

"Just a tenth part of the river could cancel out the current use of the aquifer and recharge it at 50%- returning all the water ever taken in around 30 years."

I like the idea. LFTRs could still be built to pump the water. It may be that the pumps only need to pump some of the time as water levels dictate. It's a realistic solution to a real problem. The Mississippi mud could be filtered out and used to restore land lost in Louisiana.

Where's the best place to pump it from? You don't want to disrupt barge traffic.


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 Post subject: Re: Ogallala Aquifer
PostPosted: May 06, 2014 11:30 pm 
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Quote:
The North America Water And Power project was/is proposed for diverting some of the ocean-bound river water from Alaska & the Canadian Yukon territory down to the U.S. and to Mexico: http://www.schillerinstitute.org/econom ... _1983.html and http://larouchepac.com/nawapa-overview is more recent I believe. It is a huge, breathtaking, imaginative mega project, and doubtful to get past the US EPA <heavy sarcasm>. We would have better odds of putting a local LFTR in every US area code.

Quote:
The Lions share of the Ogallala Aquifer is located under Nebraska. They have built huge dams in North and South Dakota to control the flooding from the winter run off. Why not punch holes in Southern South Dakota and divert this water to the aquifer. By using this they may not have to dump water into the river and cause the huge floods they get when they guess wrong and have to dump a lot. The whole water management is crazy, but that's a different issue. The runoff that normally goes to the Gulf in the run off would fill the aquifer first.

Moving surface waters is a standard practice. Sutlej waters from Punjab in India are being diverted to parts of Thar desert in Rajasthan. Even recharging aquifers with it could be useful. However, the desalinated water is costly and would be economical for immediate use only.


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 Post subject: Re: Ogallala Aquifer
PostPosted: May 10, 2014 12:54 pm 
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Location: Alabama
Rocketplumber wrote:
Near where I work in the Antelope Valley of the Mojave Desert, the Palmdale Water District is working on a system to recharge their groundwater by diverting runoff from the north side of the San Gabriel mountains into porous basins, rather than let it run further to the dry lake beds. There's quite a lot of precipitation in the mountains, it simply must be conserved rather than being allowed to evaporate uselessly.


I used to live in the Antelope Valley back when I was an intern on the X-33 project, and I remember being told that it got its name from the antelope that used to roam the valley back in the 1800s, when there was sufficient groundwater to sustain the herds. But over a century of drawing down the groundwater have left the area the bone-dry desert it is today. A cautionary tale about assuming that groundwater is an unlimited resource.


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 Post subject: Re: Ogallala Aquifer
PostPosted: May 12, 2014 12:07 am 
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Water levels at Jodhpur at Rajasthan in India are rising as a result of diversion of Sutlej river to Rajasthan.
http://www.hindu.com/2009/07/07/stories ... 600300.htm
I still would not expect the desalinated water from Arabian sea to be used for this purpose.
Waters from Narmada river are also being used in downstream areas from Rajasthan canal fed areas in Rajasthan and Gujarat.


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