Studied by 1 personAbrasion (erosion)
Rocks carried along a river wear down the riverbed and banks
Vertical erosion (erosion)
Downward erosion of a river that deepens its bed
Corrosion (erosion)
Where rocks such as limestone are dissolved by the acid in the water in a river
Lateral erosion (erosion)
Sideways erosion by a river on the outside of a meander channel
Hydraulic action (erosion)
The force of the river against the banks can cause air to be trapped in cracks and crevices. The pressure weakens the banks and gradually wears it away.
Which physical landforms in the lower course of a river?
-Floodplains -levees
Attrition (erosion)
Small rocks being carried by the river smash together and break into smaller
Solution (erosion)
Soluble rocks are dissolved int the water
Saltation (transportation)
Where small sand and gravel particles bounce along the river bed or sea bed. They will travel in the direction of the flow of water.
Traction (transportation)
where large rocks or large particles are dragged along the river bed or sea bed by the current.
Deposition
Process in which sediment (alluvium) is laid down in new locations.
Flocculation
The process where sediment is attracted to salt particles. Think 'flock' like sheep.
At which parts of the river does deposition occur?
The middle and lower course
Cross profile and Long profile of upper course
The long profile is steep and shallow The cross profile is narrow and v shaped.
Cross profile and Long profile of Middle course
The long profile is flatter The cross profile is deeper and U shaped
Cross profile nd Long profile of Lower course
The long profile has a very gentle (lower) gradient and is almost flat. The cross profile is very wide and deep.
Which physical landforms form in the upper course of the river?
-Water falls and plunge pools
V-Shaped valleys
Interlocking spurs
Catchment area
The area within the drainage basin
Confluence
The point at which two rivers or streams join
Which physical landforms form in the middle course of the river?
-meanders -oxbow lakes
Drainage Basin
The area of land drained by a river
Features of a drainage basin
Drainage basin
Catchment area
Confluence
Tributaries
Watershed
Estuary/mouth
Source
Name 3 reasons why deposition occurs
Because sediments get too heavy
They lose energy
As the velocity decreases
Suspension (transportation)
where silt (sand
Solution (transportation)
where rocks that are soluble are dissolved by water (limestone and chalk in particular). They are then transported within the water.
Tributaries
A stream or smaller river that flows into a larger stream or river. A branch of a river.
Watershed
An area or ridge of land that separates waters flowing to different rivers
Estuary (mouth of river)
The point where the river comes to an end
Source
The beginning or start of a river
Note 
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