Just an idea. But the kinetic energy caused by falling water is substanial; although there are many many many ways to store energy that can be drawn on at a later time.
However, that much power usually looks something like the examples below.
Okinawa Seawater Pumped Storage Power Plant 
Tianhuangping pumped storage hydroelectric project 
Mt. Elbert Pumped Storage Powerplant
Seneca Pumped Storage Generating Station
Not a lot of people know it, but the genesis of the modern so-called "environmentalist movement" can be traced to opposition to a power facility known as Storm King Mountain, in the Hudson River Valley. The "environmentalists" were not the greasy, dirty, pony-tailed hippie types you see today, but actually very wealthy landowners who had land with picturesque views of the Hudson Valley north of NYC. They opposed Storm Kind Mountain on the basis of "visual pollution", that is, transmission lines that would be strung across the valley from the generators to substations for downstate transmission, which would "ruin the view". Now, Storm King Mountain was not to be a coal-fired facility or a nuclear plant, but, tah dah, a pumped storage reservoir.
It is ironic because if you ask anyone today in New York state what Storm King Mountain was, almost all of them, including high-ranking political figures, will say it was a nuclear plant. Little do they realize that the opposition was mounted against that darling of "renewable" energy storage, a pumped storage reservoir. Then again, idiots abound in political circles and the general electorate, and the premise of democracy today seems to be that two idiots are smarter than one genius.