The amount of water you'd have to move to sustain agriculture in arid regions is a stupendously huge number. We can't even keep up with badly needed electrical transmission grid construction (and maintenance), which would be orders of magnitude cheaper to build and maintain than what you propose. I struggle to see how thousands of miles of water pipeline hundreds of feet in diameter is practical to construct or maintain. That's like type 1 civilization class of engineering project.
I'd like to see some napkin math on this. You don't have to provide all the water for Ag, you just need to supplement local shortfalls. No one is assuming rainfall in the western US will drop to zero.
> We can't even keep up with badly needed electrical transmission
Oh gosh I guess we should just give up then. Oh well, we tried. Let's all commit mass suicide now. Sorry but this modern, visionless attitude nauseates me. I'm sorry you've believe so much of modern media that you've given up hope.
Water storage is electrical storage(gravity based). Pumped hydro can even out renewable energy and allow it provide base load.
> That's like type 1 civilization class of engineering project.
