River Processes Archives - Free ZIMSEC & Cambridge Revision Notes

Meanders

By garikaib|2025-02-12T09:43:32+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Meandering river. Image credit wordpress.com ZIMSEC O Level Geography Notes: Meanders and Ox-bow lakes

Meanders

Meanders are pronounced bends in a river’s course
They are formed when a river twists and turn in wide bends.
They are common on the floodplain but can develop in any part of the […]

Comments Off

Ox-bow lakes

By garikaib|2025-02-12T09:45:54+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Ox-bow lake. Image credit airphotona.com ZIMSEC O Level Geography Notes: Ox-bow lakes

An oxbow lake is a U-shaped body of water that forms when a wide meander from the main stem of a river is cut off, creating a free-standing body of water.
This landform is […]

Comments Off

Waterfalls and Rapids

By garikaib|2025-02-12T08:59:30+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The Victoria Falls formed by water falling into a faultline. Image credit trekearth.com ZIMSEC O Level Geography Notes: Waterfalls and Rapids

Waterfalls and Rapids

Waterfalls commonly occur in the upper course section of the river although they can occur […]

Comments Off

Deltas

By garikaib|2025-02-12T09:01:58+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

A satellite photo of the Nile Delta. Image credit Flckr.com ZIMSEC O Level Geography Notes: Deltas

A delta is a gently sloping depositional feature that is found at a river’s mouth where it empties into a sea or ocean that extends […]

Comments Off

River Regime

By garikaib|2025-02-12T09:12:31+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The river Nile. Image credit historymuseum.ca ZIMSEC O Level Geography Notes: River Regime

A river regime is the term used to describe the annual variations in a specified river’s discharge.
A river’s discharge is the volume of water flowing through a river channel.
This is the total […]

Comments Off

River processes: Basic Concepts

By garikaib|2025-02-12T09:13:58+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

A turbulent river. Image credit jokeroo.com ZIMSEC O Level Geography Notes: River processes:Basic Concepts.

Rivers are perhaps the most important denudation agent.
They carve channels, form valleys,transport and deposit regolith over great distances and other material to form other types of landforms.

Terms used in describing a […]

Comments Off

River rejuvenation

By garikaib|2025-02-12T09:13:25+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Paired terraces resulting from rejuvination. Image credit Geographyas.info ZIMSEC O Level Geography Notes: River Rejuvination

Rejuvenation-occurs when there is a negative change in a river’s base level (i.e. when the river’s base level falls) which increases its potential energy and thus enables it […]

Comments Off

River Erosion

By garikaib|2025-02-12T09:18:38+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

River erosion. Image credit Internationalarchives.org ZIMSEC O Level Geography Notes: River Erosion

River erosion involves the wearing away of rock and soil found along the river bed and banks.
It also involves the breaking down of the rock particles being carried downstream by the river.
There are four […]

Comments Off

Drainage Patterns

By garikaib|2025-02-12T09:45:35+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Image credit fanshare.com ZIMSEC O Level Geography Notes: Drainage Patterns.

Drainage pattern is a term that refers to the way in which a river and its tributaries arrange themselves in the drainage basin.
The drainage pattern evolves over a long period of time and is affected by such factors […]

Comments Off

River transportation processes

By garikaib|2025-02-12T09:20:18+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes, River Processes|

River transportation processes. Image credit BBC. ZIMSEC O Level Geography Notes: River Transportation Processes.

Any energy left after a river has overcome friction is used to transport sediment.
This energy varies directly with a river’s discharge, velocity and turbulence
That is if they increase the amount of […]

Comments Off

February 2025