A fast flowing river with rapids and waterfalls?

Examples of fast-flowing rivers with rapids and waterfalls are rivers such as Pyanj, Gunt, Bartang, Vanch or even Ob.
As a rule, mountain rivers are characterized by a fast current, fed by melt water from glaciers and originating high in the mountains. Their path passes through narrow crevices and mountain plateaus, which inevitably affects the speed of the current. It is in such places that rivers encounter numerous obstacles in their path, which leads to the formation of numerous rapids and waterfalls.