[aerohead]

Originally Posted by freebeard

Nikola Tesla invented the bladeless turbine when he was ~4 years old, with a disk on an axle over a creek.

Then there is Viktor Schauberger and his Implosion Energy.

A year ago, we finally had an oxbow blowout, after 40-years of thunderstorms, and about a mile of former creek is now a lake. The two active riverbanks are a random assortment of shallows, sand, gravel, islands, stranded trees, tires, major appliances,personal belongings, and chasms. So far, there is nothing intuitive to be deduced from the distribution.
During storm floods though, the muddy, 'cappuccino' water and flotsam does reveal horizontal gyres and vertical roiling, which suggest submerged dynamics, reshaping the riverbed. Really powerful. Dangerous.Same mechanism as is presently eating away at the polar ice shelves.
As kids, my brothers and I were stupid enough to sneak into these kinds of waters, when storms hit Reseda, and Woodland Hills, California; before everything was concreted over, and fenced off, as part of the L.A. River complex.
A miracle to make it out alive.