1. Key words - Transportation.
Traction – where large rocks and boulders are rolled along the river bed.
Saltation – where smaller stones are bounced along the river bed in a leap frogging motion
Suspension – where very small grains of sand or silt are carried along with the water
Solution – where some material is dissolved (like sugar in a cup of tea) and is carried downstream.

2. Long Profile Height above sea level in meters. 0 50 100 150 200 250
Gradient/slope decreasing
Distance from sea in Kms.
Source.
Upland stream.
Lowland river.
Mouth.
Velocity/flow increasing
Cumecs/discharge increasing
Energy increases

3. Traction
Heavy rocks and boulders are rolled along the river bed. Happens most in times of flood, when the current is strongest.

4. Saltation.
Small stones and pebbles are ‘bounced’ along the river bed. Saltation can take place when the river flow is less than that needed for ‘Traction’ to take place.

5. Suspension
Very small particles of sand or clay that are ‘suspended’ in the water. These particles will ‘settle’ if kept in a jar of water overnight and the water will look clear.

6. Solution.
Takes place when material is dissolved in the water, it is invisible and does not colour the water. Occurs often in limestone landscapes where the water if very acidic. Some pollutants like weedkiller are also held in solution in the water

7. Methods of transport
Copy this picture into your books and add the title above and labels for each type of transport
Shows the rate of flow needed
Traction Saltation Suspension Solution

8. Key Words - Erosion.
Attrition – where material is moved along the bed of a river, collides with other material, and breaks up into smaller and smaller pieces.
Corrasion – fine material rubs against the river bank. The bank is worn away, by a sort of sandpapering action called abrasion.
Corrosion – some rocks forming the banks and bed of a river are dissolved by acids in the water
Hydraulic action – the sheer force of water hitting the banks of the river.