Key words - Transportation.

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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.
  

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Long Profile
Height above sea level in meters. 0 50 100 150
200 250
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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
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Methods of transport
Copy this picture into your books and add the
title above and labels for each type of transport
Traction Saltation Suspension
Solution
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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.