Ppt river

Erosional Landforms By Running Water

MUHAMMED AJEEB. A

B.Ed GEOGRAPHY

NSS TRAINIG COLLEGE PANDALAM

The act of removing the rock debris derived

by weathering process of external agencies

is called Erosion.

The removing the rock debris and deposited

elsewhere is called deposition

Erosion

DEPOSITION

Factors influencing Erosion

Amount of water

Speed of the flowing water

Hardness of rock

Slope of the land

Erosional landforms by Running water

The inclined surface on both side of the

river are called valleys

The down cutting of the river is faster than

lateral cutting

Valley take v shape

V shaped valley

V shaped valley

Canyons are very long narrow valley

It found in Arizona in United states of

America

Formed by the erosive action of Colorado

river

One of the national park in America

446 km long, 6-29 km wide, depth 1830

m

Grand canyon

Grand canyon in US

The waterfall vertically down from the steep sides on the hilly region. E.g.. Jog waterfall in Karnataka

Waterfall

Jog falls

DEPOSITIONAL WORK

OF RIVER

During the monsoon season ,when the river

overflow its banks there is flooding. As a

result of this , there is a deposits of silts on

the banks. This evolve as flood plains

Flood plain

The speed of the river decreases when it

reaches the flood plains so the river twist

and turns which occur thus are called

meanders

Meandering

A crescent shape lake formed when a

meander of a river or stream is cut off from

the main stream

Changing course of river

Oxbow Lake

When rivers brings materials along with it

which gets deposited near to the mouth of

the rivers the formations of a delta.

It look like the Greek letter delta (∆)

Eg. Sunderban delta in India

Delta

Sunderban Delta