FLUVIAL EROSION

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Gondia Education Society’s C.J. Patel College, Tirora , Dist.- Gondia 441911. Subject : FLUVIAL GEOMORPHOLOGY Topic FLUVIAL EROSION types & process Is presented by Dr. Nanabhau S. Kudnar M.A., B.Ed., SET, NET, Ph.D., M.B.A . Head, Department of Geography C.J . Patel College Tirora .

Erosion :

Erosion Erosion is the process by which there is wearing away of land surface by the mechanical action. Fluvial erosion refers to the wearing away of land surface with the help of water. A river erodes its bed and sides. Erosion is the wearing away of rock by moving agent and are carried away by them.

Process of Erosion:

Process of Erosion Solution/ Corrosion The river water may also dissolve the minerals in the rock and carry them down the river. Limestone may be dissolved quickly in the river water, especially when there is high concentration, to form soluble calcium hydrogen carbonate

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Cavitation It is caused by constriction of flow which raises the velocity and hence the kinetic energy of the steam. Lead to the formation of bubble .

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Hydraulic action Water traveling at a high speed may enter the line of weakness of rock when it hit against these rocks at the side of the channel. The force may cause the rock to break and the broken pieces of rock are swept away

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Abrasion/ corrasion Rocks that are carried in the river grind and erode the river side and bed. Some of the rock at the sides and bed of the channel are washed away. This type of erosion widens the channel through lateral erosion and deepens the channel by vertical erosion.

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Attrition When material in the water collide with one another, they break and become smaller particles. These particles become smoother and rounded .

Types of fluvial erosion:

Types of fluvial erosion Vertical erosion Lateral erosion Headward erosion

Vertical erosion :

Vertical erosion When vertical erosion occur, the channel is deepen and thus the river is able to hold more water.

Lateral erosion :

Lateral erosion When lateral erosion occur, the sides are eroded and the channel is widen.

Headward erosion :

Headward erosion

References :

References The Earth’s Dynamic Surface K. Siddhartha Internet searching: www.encyclopedia_britannica_eb.Com

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