Plenty of places can do this with essentially zero environmental impact. If it rains a lot and the rain came from ocean evaporation and the natural water route

Plenty of places can do this with essentially zero environmental impact. If it rains a lot and the rain came from ocean evaporation and the natural water route was a big river quickly back to the ocean, you can pretty harmlessly divert a portion through hydroelectric. Not everywhere is the American west where it doesn’t rain a lot and water sources are being used way past their capacity.