What is the net energy expenditure of moving water over a mountain range besides losses due to friction/turbulence? Desalinization also uses pumps and most hea

What is the net energy expenditure of moving water over a mountain range besides losses due to friction/turbulence? Desalinization also uses pumps and most heavy water users(Ag) are nowhere near the ocean so I'm not seeing your point. Why not use that solar and wind power to move water from areas with too much water to areas with too little water? You could even start with a bifurcated grid which avoids the Rocky Mountains if that satisfies your concerns. There is quite a bit of excess water up north. You could even pipe the freshwater through pipelines sunk near the seafloor. Imagine if the coastal CA metropolises got their water from an off-shore pipeline coming from Alaskan river mouths while the inland water they're currently using stays inland to feed big Ag. If you made the pipeline flexible and used one-way valves, you might even power it with tidal motion.