This is about a clean, environmentally benign, cost effective way to capture energy which is otherwise lost.
Cisterns are normally considered to be rainwater storage devices either underground, or at ground level. Also, cisterns are not involved with the production of electricity.
The 12 continental U.S. places with the most annual rainfall are all on the west coast. Their average figures range from 105.6” at Grays River Hatchery, Washington state, to 130.6” at Aberdeen Reservoir, also in Washington.
What if a rather large cistern were placed at the top of a 200’ tower, just offshore in Washington state, where the rainfall was 108” (9 feet) per year? What if this device collected rainfall, and periodically allowed the accumulated water to escape by way of turbines just above the water’s surface? The turbines would be connected to the nearest power transmission lines
How much electricity could such a cistern/turbine combination generate in one year? Let’s talk about one acre in size, nine feet in depth. One acre is 43,560 square feet. This is not much larger than the average putting green at a golf course.