Geography Matter!

Friday, February 5, 2010

River VS Waterfall

River:
About:A part of river where current is very fast
Formation:Forms due to increase in water flow characterized by a river becoming shallower.
Created by:Four factors, separately or in combination, can create rapids: gradient, constriction, obstruction, and flow rate.
Examples:Violent water below Niagara Falls, Des Moines Rapids, etc.
Artificially:Generally not created artifically
Types:6

1Has small waves in fast moving water and very few obstacles.
2Has wide channels and rapids that are easy to navigate, without many turns or obstacles. Small waves less than two feet high.
3Intermediate. Strong currents require training and ability to maneuver quickly and effectively. From this class on, rafters require a guide. Not suitable for young children.
4Advanced. Powerful rapids for strong paddlers that can handle fierce turns and spins. Drops and waves are common.
5Expert. Violent, dangerous rapids, usually formed through obstructed channels, tight turns, and soaring falls.
6Unrunnable. Likelihood of death in attempting class 6 runs.(TYPES)


Waterfall:
About:A permanent flow of water over the edge of an erosion-resistant cliff.
Formation:Forms due to sudden break in elevation or nickpoint of a rock due to water flowing over it.
Created by:Creation of a steep, vertical drop and a plunge pool into which the water of river falls.
Examples:Angel Falls, Boyoma Falls, Victoria Falls, etc.
Artificially:Created artificially in miniature form as part of garden decoration etc.
Types:10

1Block: Water descends from a relatively wide stream or river.
2Cascade: Water descends a series of rock steps.
3Cataract: A large waterfall.
4Fan: Water spreads horizontally as it descends while remaining in contact with bedrock.
5Horsetail: Descending water maintains some contact with bedrock.
6Plunge: Water descends vertically, losing contact with the bedrock surface.
7Punchbowl: Water descends in a constricted form, then spreads out in a wider pool.
8Segmented: Distinctly separate flows of water form as it descends.
9Tiered: Water drops in a series of distinct steps or falls.
10Multistep: A series of waterfalls one after another of roughly the same size each with its own sunken plunge pool.

Source:http://www.diffen.com/difference/Rapid_vs_Waterfall

~Nicole Mui~