Water crisis is so bad in Mexico City that it is one of 11 cities predicted to reach Day Zero – the day the water runs dry

SS ^ | 9/15/21 | SS

[JD_UTDallas]

Vegas is the textook example of water recycling. They are allocated 300,000 acre feet per year they use 400,000 total but returns 230,000 acre feet per year via the las Vegas wash due to recycling every drop of water that hits a drain in the las Vegas basin. They use less than their 300,000 net and bank every year water in lake mead for a dry day. California is allocated 7 million acre feet and uses nearly 5 million acre feet per year to water grass in the desert to send hay to places like Saudi Arabia. So who is the wasteful ones?

Las Vegas just completed their 3rd intake it’s at 860 feet MSL the dead pool level for lake mead is 895 MSL where not a single drop can be sent down river. From 895 to 860 is 4.2 million acre feet that Vegas has access too when Hoover dam can’t sent any water down stream Vegas that’s 12 years of water at full Vegas consumption levels. With no inflow of water from the upper basin states a impossibility.

42 million visitors per year and less than 3% of total water use that’s epic level conservation.

https://m.lasvegassun.com/news/2018/may/10/the-strip-might-use-less-water-than-you-think/

https://truthout.org/articles/why-las-vegas-is-at-the-heart-of-western-statess-water-conundrums/?amp

https://m.lasvegassun.com/news/2014/aug/24/how-our-water-goes-toilet-tap/

https://lynceans.org/all-posts/las-vegas-made-a-good-bet-on-the-third-straw/

https://www.theguardian.com/us-news/2019/mar/25/california-water-drought-scarce-saudi-arabia

[JD_UTDallas]

reverse osmosis is usually set at a 50 % recovery rate so permeate brine is usually at twice the incoming seawater ppt count. For normal seawater that’s 70,000ppt in brine. The Israeli method is to inject that water under considerable pressure and force through a series of pitfall nozzles miles off shore where due to its velocity and force is instantly mixed with 10 times or more ambient seawater lowering the salinity to less than 40,000 ppt a few meters from the nozzles it’s a non issue from that point forward as the 40,000 ppt mixes down to ambient in a few hundred more meters no density difference can form with salinity that close to ambient.

[Boomer]

Now that sounds like it wouldn’t harm the marine life. The pressure from the water would probably prevent them from getting too close to the high pressure nozzles.

[JD_UTDallas]

Even if they did get close they would just be pushed away by the current the exposure to the slightly higher salinity is transient. They fish for a good portion of the protein in that country they love and cherish the Med.

The Israelis are the world leaders in desal they have it down to 54 cents per cubic meter. That’s cheaper than the water from the tap in DFW by half on a 1000 freedom units to the equal amount in European units. They also lead the world in water recycling 80+% of their water is reclaimed and used for agriculture and other nonpotable use once it leaves the sewerage system which is tertiary treated to be sterile and nearly pure enough to drink directly.

[Svartalfiar]

Thirty plus two can save the world. If couples have 2 children after age 30, there will be no overpopulation.

Why would everyone have to wait till 30? And, if every couple only had two kids, the population would die off - baseline population replenishment rate is around 2.2 kids per couple.

[gleeaikin]

The current population is exceeding the carrying capacity of the earth. The idea of having 2 children after age 30 is to gradually decrease the population by several billion so that it once more is matched to the carrying capacity of the land and seas. Then new ideas could be encouraged to maintain the population at a healthier level. The population would not be dying off, it would merely be gradually reduced to a healthier level, and no one would be deprived of having 2 children. Also, no more child marriage, or people having children before they have grown up to be responsible parents. I have spoken with more than one young man who at around age 26 to 28 has asked me, “Do you know any nice girls, you know, the kind you might marry?” That is a healthy age for a young man to think about marriage, wild oats have been sown, and maturity and responsibility is being reached.