Flashcards in Rapids Deck (5)
What processes cause rapids
Erosion- hydraulic action, the water breaks up and erodes away the less resistant rock.
Transportation- saltation/suspension of the eroded materials
What forms rapids
The river runs over alternating layers of resistant and non resistant rock. The material of the eroded less resistant rock is in the load and disturbs the flow of the river but not enough to cause a waterfall.
Diagram of rapids
Look in folder
Example of rapids
Whirlpool rapids gorge (Niagara river new york) class V1 rapids which reach up to 20 mph and are some of the most dangerous; 35ft deep and a volume of 100000 cubic meters per second