In the 1980's Saudi Arabia looked into using ocean tugboats to tow glacial icebergs to their shores as a new supply of fresh water. It was feasible but not economical.
In the 1990's some south-western US developers suggested piping great lakes water to Arizona & Nevada so they could develop some inexpensive desert land holdings. Some great lakes states studied the proposal and found the bad results from taking too much water out of the Colorado river. To protect their lakes, all the US states bordering the great lakes states have signed an agreement requiring that any water diverted from the great lakes must now be returned to the great lakes watershed after its use.
Some times it's most economical to store excess water in place until it's needed later.
Interesting topic, is there a specific project you have in mind?
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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