River Processes Archives - Page 2 of 3 - Free ZIMSEC & Cambridge Revision Notes

Drainage Basin

By garikaib|2022-09-15T12:43:41+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The drainage basin. Image credit BBC. ZIMSEC O Level Geography Notes: Drainage Basin

The term drainage basin refers to an area of land drained by a river and its tributaries (river system).
It includes water found in the water table and surface run-off.
The drainage basin is also known […]

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River Deposition

By garikaib|2022-09-15T12:44:06+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

River deposition (left bank). Image credit Panoramio. ZIMSEC O Level Geography Notes: River deposition

Deposition occurs when a river no longer as sufficient energy to transport its load.
When its velocity begins to fall and has less energy, a river’s competence (maximum size of material […]

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Surface Water flow and the origin of rivers

By garikaib|2022-09-15T12:43:40+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Natural Springs contribute their water to rivers and often form the source of rivers. Image credit paintballfun.com ZIMSEC O Level Geography Notes: Surface Water Flow and the Origin of rivers

Surface water flow and […]

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Factors affecting erosion, transportation and deposition

By garikaib|2022-09-15T12:44:05+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Laminar Flow. Image credit gjhikes.com ZIMSEC O Level Geography Notes

The following factors affect the river’s energy and ability to erode, transport and deposit its load.
Type of flow, gradient of channel, volume/discharge, cross-sectional channel shape, channel roughness.

Type of flow Laminar and Turbulent [...]
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The hydrological / Water cycle

By garikaib|2022-09-15T12:43:40+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The hydrological cycle. Image credit BBC ZIMSEC O Level Geography Notes: The hydrological cycle.

Water does not leave or enter the planet earth.
It is instead continuously transferred between the atmosphere and the oceans.
The system of inputs, storages,flows and outputs is known as the water or hydrological […]

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River profile

By garikaib|2022-09-15T12:44:04+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The long profile of a river. Image credit worldbuildingschool.com ZIMSEC O Level Geography Notes: River Profile

Rivers can be studied from two aspects viz:
The long profile-this is the cross section along the river’s entire length from its source to its mouth.
The short profile-this […]

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River capture

By garikaib|2022-09-15T12:43:39+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

River capture. ZIMSEC O Level Geography Notes: River capture

This is a process where one River captures the headwaters on a nearby stream.
This can occur due to several reasons viz:
Tectonic earth movements, where the slope of the land changes, and the stream is tipped out of its former course.
Natural damming, […]

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Landforms resulting form river processes

By garikaib|2022-09-15T12:44:03+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Rapids near Niagara Falls. Image credit NiagaraFallsLive.com ZIMSEC Geography Notes: Landforms resulting from river processes

A river through its processes of erosion, transportation and deposition forms several landforms.
These can be broadly divided into those landforms resulting from erosion and deposition.

Landforms […]

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The construction of dams for multiple purposes

By garikaib|2022-09-15T12:43:13+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

Lake Kariba. Image credit newsday.co.zw ZIMSEC O Level Geography Notes: River Processes: The construction of dams for Multiple purposes

a barrier constructed to hold back water and raise its level, forming a reservoir.
Daming involves the building across a river to hold the water back.
Strictly speaking the […]

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Gorges /Canyons

By garikaib|2022-09-15T12:44:03+02:00January 24th, 2023|Notes, O Level Geography, Ordinary Level Notes, River Processes|

The Gorges du Verdon. Image credit weebly.com ZIMSEC O Level Geography Notes: Gorges

Gorge– is a narrow valley between hills or mountains, typically with steep rocky walls and a river/stream running through it.
These can occur in virtually any part of a river’s course provided […]

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January 2023