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Rivers - PowerPoint PPT Presentation


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Rivers A glossary by Year 4 Source Waterfall Gorge Tributary Oxbow lake Meanders Deltas and estuaries Source The source can be called headwaters. It’s the beginning of a river. Back to title page More info Source The source may be fed by underwater springs, rain or melted snow.

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Presentation Transcript
slide1

Rivers

A glossary by Year 4

slide2

Source

Waterfall

Gorge

Tributary

Oxbow lake

Meanders

Deltas and estuaries

slide3

Source

The source can be called headwaters. It’s the beginning of a river.

Back to title page

More info

slide4

Source

The source may be fed by underwater springs, rain or melted snow.

Back to title page

More info

slide5

Source

A river can have more than one source .There’s many different

ways in which rivers can begin.

This is the source of the river Lavant .It’s the duckpond at East Dean.

Back to title page

waterfall explore
Waterfall Explore
  • The highest waterfall is Angels Falls and it is 979m.

It is in Venezuala, South America

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More info

how a waterfall forms
How a waterfall forms

The waterfall is made when water falls down a cliff or a steep hill.

This is the Victoria Falls in Africa.

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slide8

Gorges And Valleys

A gorge is a steep sided river valley .

They are all very narrow and deep .

V shaped valleys are caused by erosion.

Rocks and stones move in the water and wear away the ground..

Back to title page

slide9

Tributaries and confluence

A Tributary is a stream that flows into a

larger river. The water flows from the

Tributary and runs to the main channel..

A Confluence is where a Tributary

joins the main river.

Back to title page

meanders of a river
Meanders of a river

A Meander is a loop in a river.(see left)

Back to title page

More info

meanders of a river11
Meanders of a river

A meandering river

Back to title page

More info

meanders of a river12
Meanders of a river

This is a river with several meanders.

Back to title page

oxbow lake the start
Oxbow lake-the start

An Oxbow lake is formed when a meander curves into a loop..

Back to title page

More info

ox bow lake
Ox-bow lake

This is an Ox-bow lake.

Back to title page

More info

slide15

1.

There`s a thin bit of land in the loop.

When the land in the loop gets thinner the river breaks through and makes a new path

2.

3.

The ox bow lake is left

Back to title page

floodplain
FLOODPLAIN

The floodplain is a piece of flat land in a river valley close to the river bank. It is usually found in lower course rivers.

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More info

slide17

Floodplain

A flood Plain is flat land each side of the river . If there is heavy rain or melting snow the river will flood.

This is the river Arun, the

land is flat here so it flood when it rains hard.

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estuary
Estuary

This is an estuary by the sea …………..

An estuary is where the river widens out . This is the

mouth of the river where it runs into the sea.

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More info

slide19

Estuary

There are different types of estuaries.

This is a salt marsh estuary

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