1. People don’t realize how little municipal water use accounts for. Arizona for example gets 2.8 million acre-feet of water from Lake Mead every year. 20% of that is municipal. 30% is used indoors(showers, bathroom, cooking), 70% is used outdoors(lawns, xericaping, washing cars, pools, etc.) That means 168,000 acre-feet of water used indoors, and 392,000 acre-feet used outdoors. That’s for all of Arizona and how they currently use water. Agriculture uses 70% of water in Califormia and Arizona, for a total of 5 million acre-feet of water every year.
Yuma is the top producer of lettuce in the county during winter months, here is an expert I found on water use.
Quote:
Within those total acres, over 8,800 acres were double cropped using a total of 60,555 acre-feet of water for an average of approximately 5.7 acre-feet of water per acre.
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https://www.yumairrigation.com/crops.html
They mention in the original article for the development that it wants to use aeroponic or hydroponic farming, which uses 90% water and land. So if this replaced 150k of farm land at 5.7 acre-feet of water would be almost 900,000 acre-feet of water. I doubt they would replace all that farming with aeroponic or hydroponic farming, but just for discussion sake that would still be roughly 800,000 acre feet of water saved. So if the 7 million people living in AZ use 560,000 acre-feet of water, so this would add roughly 400,000 acre-feet of municipal water use for another 5 million people. So just under 1 million acre-feet of municipal water us for the current population of AZ plus the residents of this new city. Those are incredible numbers. Not to mention the Lake Mead only accounts for 30% of Arizona water sources. Only adding roughly 200k acre-feet of water while keeping the same amount of farms with these types of farms and adding 5 million people would be amazing. Even if they don’t replace every farm with aeroponic or hydroponic farming it will just save more water. This just shows how much water is used to farm compared to municipal use. The low water levels at Lake Mead could be completely solved with conservation in agriculture. I have a feeling the corporate agriculture lobby is behind a lot of the pro desalination talk. Like it could obviously be beneficial to some degree, but it clearly benefits that lobby to not invest in water efficient farming, while pushing subsidized desalination by the states.
2. I agree with everyone who would prefer they do these in already built cities. As well as I don’t buy that something like this will happen. Zero proof of concept for even a miniature scale of a development like this. Best way to get investors is proof of concept and there is none.
3. Bill Gates purchased a little over 20k acres west of Phoenix a few years ago and not an inch of dirt has been moved.