Mexico City Is Virtually Out Of Water

MSN ^ | 5/21/24 | Douglas McIntyre

[GenXPolymath]

Vegas has already found the solution they will never be out of water they recycle every drop that hits a drain. Outlaw lawns, most water use in a household is not consumptive it’s washing laundry, dishes, showers and flushing the toilet. The amount of water a human drinks and then loses to evaporation is small in fact most of the water a human needs comes from the food we eat half of our water loss per day is from the food we eat as our bodies burn it into CO2 and water via the ATP cycle. By recycling all those in home water you get 95% back into the water supply only 5% or less is lost via human evap or laundry dryer losses. Vegas is the world leader in recycling Israel is right behind it by percentage. Vegas gets 300,000 acrefeet per year they use less and return to lake mead 200,000+ acre feet per year building up a reserve in excess to their 300,000 allotment. Ten years running now they a have put back more every year than they were allowed to take so they have banked over a million acre feet on lake mead for future use. NV as a state gets to keep every drop they add to lake mead from the Las Vegas wash and the Virgin River per the Supreme Court. They add more in every year due to rain fall in the basins as well. 4” per year added up when it’s hundreds of sq miles of area. The recent floods in Vegas show that in soades.

[353FMG]

>> there is no way you.are pumping water uphill for 22 million people<<

Large number of vertical sump pumps in series to overcome static head

[1Old Pro]

OMG they’ll all be coming up here.

They already are, the numbers will just escalate, again, with an open border.

[GenXPolymath]

“The average person’s daily water consumption is estimated to be 80-100 gallons per day, largely attributable to faucets, toilets, showers and washing machines.”

80x22,000,000 = 1,760,000,000 PER DAY
That’s 9 decimals deep per day. That’s 5400+ acrefeet per day and 1.97 million acrefeet per year. And that’s just residential use which is usually half the water use in a city. Commercial and industrial can be half or more than residential.

So at 100% efficiency with no losses for friction to pump one acrefoot of water against gravity vertically not horizontally up an incline through pipes with friction over distance. Is calculated as 1 acre foot = 325,850 gal which weighs 2,719,226 pounds to lift that 7400 feet would require 20,125,972,400 ft lbs of work. Thats 20 billion ft lbs for one acre foot you need 5400 acrefeet per day so 108,680,250,960,000 ft lbs of lift per day straight up not also horizontally 200+ miles to the ocean. So how much power is that in kWh? 1 kWh = 2655223.74 ft lbs

1.08E^14/2.65E^6= 40,930,743.28 kWh per day just in vertical lift at 100% electric motor efficiency and 100% pump efficiency both are impossible. 70% is a good number for electric driven pumps overall eff. So 40.9 million kWh is also 49,930.8 megawatts hours per day or 1750 megawatt hours per hour. That’s the output of two one gigawatt nuclear reactors 24/7/365. Cost wise at $50 per megawatt hour which is cheap on the wholesale market is $2,046,537.16 per day or $746,986,064 per year just to move the water vertically. Without knowing the size of the pressure pipes to run up hill for 200+ miles the horizontal friction losses are not Calculable. Then add in the energy to desal the water itself. The very latest RO plants use 3 kWh per cubic meter and there is 264 gallons in a cubic meter or 1233.48 cubic meters per acrefoot. Since we need 5400 acrefeet per day that’s at least another 19,982,376 kWh or 19,982 megawatt hours per day that’s also 832 MWh per hour the output of a CANDU 900 reactor 24/7/365. At the same $50 megawatt hour that’s $999,118.8 per day and $364,678,362 per year for the energy to desal.

Adding just the energy costs alone together is a billion dollars per year without pipeline losses. The capex for three 1+ gigawatt reactors, a 1.79 billion gallons per day desal plant, which would be the largest desal plant in the world by a factor of six bigger than the largest ever built. 1.79 billion gal is 6.66 million cubic meters.

“Ras Al Khair, Saudi Arabia: 1,036,000 m3/day.”

plus 200+ miles of huge pipes plus pumps every 500 psi step. It takes 430 psi to lift water with no friction 100 feet. Your going up 7400 feet. Pipe size would be an issue you are moving 6.66 million cubic meters per day or 76.93 cubic meters per second. Water can be pumped at about 1 meter per second in speed economically through ppipes under pressure. So you need at least 76.93 square meters of cross section in your pipe. @5 meters in radius a pipe would have 78 sq meters of area so a ten meter wide pipe would do...that has to handle 500 psi over its length at each pump station.