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Lucinda Conder Geography Revision




Unit 2 ­ The Natural Environment
Section A ­ The Physical World - River Landscapes
River processes produce distinctive landforms

Definitions of watershed, confluence, tributary, source and mouth
Be able to label these features on a map, photograph or diagram
Understand the processes of weathering ­…

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Lucinda Conder Geography Revision




Drainage basin: An area drained by a river and its tributaries.

Watershed: The boundary of the drainage basin.
Confluence: Where a tributary meets the main river.
Source: Where the river starts (often found in upland areas)
Mouth: Where the river ends and meets the sea or…

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Lucinda Conder Geography Revision




Traction ­ when large materials are dragged along the bed
Saltation ­ when smaller stones are bounced along the bed of the river
Suspension ­ fine material is carried by the water.
Solution ­ dissolved material is carried away

Deposition
Deposition is when the river deposits…

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Lucinda Conder Geography Revision




Shallow water Hydraulic action
More friction Deeper water


The fastest flow (thalweg) is in the outside bend due to centrifugal force.

An Oxbow lake is formed when there is lots of erosion (hydraulic action and abrasion) causing the
river to break through the neck of a…

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Lucinda Conder Geography Revision




Animal habitats effected ­ death of animals, trees have too much water

Shrewsbury ­ 2000 floods ­ The river Severn
Over the last 350 years there has been one major flood every 10 years, the first being in 1338.
Shrewsbury is located n the river Severn.…

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Lucinda Conder Geography Revision




Floodplain zoning
o Education ­ Practical action & Flood forum
Teaching people about the risks
Modifying the event ­ means altering the river to reduce or prevent flooding.
o Hard engineering
Embankments ­ used as paths; not high enough (false security)
Channelisation ­ long lasting; more…

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Lucinda Conder Geography Revision

Comments

starkingfisher

this has helped me soooo much thx

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