Exam (elaborations)
Fluvial cycle and landforms
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this topic contains the fluvial cycle and landforms and the landforms that are formed through the erosional activity and by depositional activity.
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FLUVIAL CYCLE AND LANDFORMSThe landforms created by erosional activity of running water mainly rivers are
called as fluvial landforms. The term fluvial derives from the Latin word
“fluvius” that means river. River flowing to the oceans drain about 68% of the
earth’s land surface. These are mainly three processes involved in the
formation of fluvial landforms. They are Erosion, Transportation, Deposition.
The enaded material in transported by running water in fluvial landform
various aspects of fluvial erosive action include:
1. Hydration: The force of running water wearing down rocks.
2. Corrosion: Chemical actions that leads to weathering.
3. Attrition: Rivers load particles, striking, colliding against each other and
breaking down in the process.
4. Abresion: Solid rivers load striking against rocks and wearing from down.
Usually, there are three types of erosion.
1. Vertical erosion
2. Lateral erosion
3. Headward erosion
Vertical erosion: The erosion of the box of the stream [downcutting leads to
valley Deeping].
Lateral erosion: The erosion of the wall of a stream [leads to valley
widening].
Headward erosion: Erosion towards the mouth of the river is called
headward erosion. It leads to the increase in the length of the river.
The erosion cycle of Fluvial landforms has three phares:
1. Youth stage: The following are characteristics of landforms.
a. Poor integration of streams
b. Shallow V-Shaped valley
c. Waterfall may exist
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