Oh. I never posted my original idea. Like @TrueCelt I settled on fresh water, but I went bigger. For convenience, until I make enough money to buy a really nice beach front home on some tropical type island somewhere, I defined my object as the water contents of the Quabbin Reservoir. That’s roughly 400 billion gallons of very nice potable water, and is currently the main supply for about 300 million people.
Reaching it to touch is no problem (I only live about 15 miles away) and the public is allowed to walk and bike around the paths on the grounds. As for dealing with the daily water when I don’t have a use for it, it’s about 25 miles from my current home to this convenient dumping place called the Atlantic Ocean.
Yeah, I’d be ‘polluting’ that lovely saline water with nasty fresh water, but given how many rivers empty into the oceans all the time, I think it would not be a problem for centuries.
So then I just tell everyone facing a shortage of fresh water, is that all they have to do is create a suitable site, like some valley, and build dikes to block low level exits so it doesn’t flood out the nearby areas. (The Quabbin’s surface area is about 40 square miles, but if your valley is deeper/sharper sided, it could be smaller.
Just give me a call when you’re ready. For the cost of first class travel and accomodations and a really reasonable daily fee for my efforts (maybe a thousand bucks?), I will come and provide all the water you’d like. Heck, I could even refill the Aral Sea, though that might take quite a few months worth of effort.
Now, this won’t be a permanent solution, because its a single dumping of water versus a natural drainage basin, but so what? If your water level gets low in a year or so, just call me back for a refill.
So, permanent employment for me, at a pleasant and emotionally satisfying job, while extensively travelling the world. What could be nicer?
Okay, yes, the rising sea level (I mean the natural one that is predicted and ongoing) will reduce demand in some areas. For example, I doubt Florida will be wanting many new reservoirs. Oh, well, I’m pretty old anyway.
Oh, and I’ll make a point of touching the Quabbin in the depths of winter, so not only will my clients get the lovely water, but it’ll help slow down global warming at least a tiny bit.