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Summary Geomorphology - Grade 12 Geography R99,00
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Summary Geomorphology - Grade 12 Geography

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Master Geomorphology in Grade 12 Geography with this concise and comprehensive guide! Covering key topics like landforms, processes, and the effects of weathering and erosion, this resource will help you understand and ace any exam question. Perfect for quick revision or deep study. Get yours now a...

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  • November 25, 2024
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Geomorphology




Permanent rivers: flow throughout the year and the water table is always
higher than the riverbed.

Periodic rivers: flow only in the rainy season. The water table is higher than
the riverbed only in the rainy season.

Episodic rivers: flow only after heavy rainfall when runoff flows into the
river. The water table is always lower than the riverbed.

Exotic rivers: flow across two climatic regions.




Laminar flow: (slow as a lamb)

Little erosion.
Water moves in parallel lines.
Little friction.
Level flat riverbed.

Turbulent flow:

A lot of erosion.
River bottom is uneven and steep.
Water moves bubbly.

, A drainage basin is an area drained by a river system.




High drainage density:

High rainfall.
Hard rocks.
Steep slope.
Little vegetation.
Little infiltration.

Low drain density:

Low rainfall.
Soft rocks.
Gradual slope.
Lots of vegetation.
More infiltration.

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