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River - Coggle Diagram
River
FEATURES
Drainage basin
Area of land drained by a river
Water shed
Edge of highland surrounding drainage basin
Source
Start of a river
Confluence
The point at which a river joins another river
Mouth
Ending of a river
Tributary
a smaller river that joins into a larger one
CHARACTERISTICS
Bed
The bottom of the river channel
Bank
The sides of a river channel
depth
distance from the water surface to the bed
wetted perimeter
Length of bed and banks in contact with bed and banks
Speed of flow
How fast the water is moving
EROSION
Attrition
when larger particles collide and break down into smaller pieces
Hydraulic actiom
The force of water wearing away the bed and bank of river
Abrasion
Small particles rub against the bank and bed of the river
Solution
Acid in river dissolves rock
TRANSPORTATION
Traction
Rolling stones along the bed
Solution
Minerals dissolve in water
Suspension
Silt and clay sized are carried within the water flow
Saltation
Small particles bounce along the bed in a leapfrog motion
DEPOSITION
Large boulders deposited at top
Small particles left at the end