Transportation – The movement of material by suspension, solution, traction and saltation
Types of transportation:
Suspension: Fine, light material is carried along by the river.
Solution: Minerals are dissolved in the water.
Traction: Large boulders and rocks are rolled along the river bed.
Saltation: Small pebbles and stones are bounced along the river bed.
To remember that transportation moves in four ways – suspension, solution, traction and saltation – recall the following:
Transport (transportation) was the solution (solution) to moving the large suspenders (suspension) so a tractor (traction) was used, but they had to salt (saltation) the roads first.
Transportation is all about the movement downstream of materials that have broken loose as a result of erosion. This eroded material is generally referred to as sediment.
The sediment moves faster nearer the river's source, where it flows quickly down steeper inclines. Where a river approaches the sea over flatter land, the flow is reduced and the sediment is deposited.
This can result in the "silting up" of river estuaries – granular material is deposited over time, causing obstructions that result in new channels and deltas.
![](/images/user/base/Maths/Logarithms/Reference%20Tables/reference-log-table-1.4df6ee6.jpg)
![](/images/user/base/Maths/Logarithms/Reference%20Tables/reference-log-table-2.d516bb3.jpg)
![](/images/user/base/Maths/Logarithms/Reference%20Tables/reference-anti-log-table-1.b0b0513.jpg)
![](/images/user/base/Maths/Logarithms/Reference%20Tables/reference-anti-log-table-2.f89189d.jpg)