when the river water suddenly falls from sufficient height it is said to have formed a waterfall .
They prevented travel to the interior of Africa. _ Airiana
The Dalles
The address of the Big Rapids Community Library is: 426 South Michigan Avenue, Big Rapids, 49307 2016
The address of the Eaton Rapids Public Library is: 220 South Main Street, Eaton Rapids, 48827 1256
The address of the Dell Rapids Carnegie Public Library is: 513 N Orleans Ave, Dell Rapids, 57022 1637
cataract
Rapids
You could say καταρράκτες [=waterfalls]
Waterfalls or river rapids
A lock is the mechanism for raising and lowering ships in a river that has rapids or waterfalls. Locks are used to make navigation an easier task.
CAtaract
Portage.
A mechanism for raising or lowering ships in a river that has rapids or waterfalls is called dam and lock system. It is a special kind of dam system.
you can see waterfalls on the internet but also in the rain forest and any place where there are many large rapids in a large rivers
West
"Waterfalls and rapids"
0402655877 is a free call line for all that information