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River processes

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There are three main processes a river does to shape the landscape: erosion, transportation and deposition. Different processes create different river landforms.

ErosionEdit

CorrasionEdit

The water hurls sand and pebbles onto the river banks, which then break off pieces of rock and mud - causing undercutting.

CorrosionEdit

This is when the weak acid in the river dissolves the rock in the water. Most active on rocks containing carbonates, such as limestone and chalk.

AttritionEdit

The rocks and other particles carried by the river are reduced in size as they collide with the banks and other rocks.

Hydraulic ActionEdit

This is the sheer power of the river hitting the banks.

DepositionEdit

This happens because the river loses energy. It drops the heavier load first. Deposition is more likely to happen when the velocity of a river decreases. This decrease in velocity is most likely to occur when: 1. There is low discharge of particles in period of low precipitation 2. Less velocity when the river enters a sea or lake 3. The load of sediment and particles suddenly increases ie. from a landslide 4. There is shallow water on the inside of a meander

TransportationEdit

TractionEdit

lol why you cheating in geography moses

SaltationEdit

This is where smaller pebbles or sand bounce along the riverbed.

SuspensionEdit

Fine sediment are suspeneded in the water by turbulence. They do not touch the riverbed.

SolutionEdit

Dissolved particles are carried invisibly in the water.

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