Want this question answered?
V shaped valleys, meanders, oxbow lakes, gorges, waterfalls rapids & deltas are some.
the amazon river does not flow with a swift current .And there are not many waterfalls and rapids in its path
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