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Changing Landforms (Rivers)

Last updated over 1 year ago

4 Nsɛmmisa

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Asemmisa {{asɛmmisaAhyɛnsode}}

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USE THE SENTENCE STARTER!!!
Watch the time lapse video of the Ucayali river in Peru from 1985 - 2013. What do you notice is changing about the river? What does it look like the river creates at the end?
Sentence Starter: As I was watching the time lapse of river from 1985-2013, I noticed... The river at the end looks...

Question 2

01:04

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What does a canyon, delta, and sinkhole all have in common? They are the results of erosion and deposition.

Erosion is the process by which sediments are or carried from one place to another. The 4 main causes or of erosion are wind, water, ice and waves.

Deposition is the geological process in which sediments are to land.

What have been created by erosion and deposition?

Canyons and valleys are made by the flow of water and water moving sediments from a stream bed. The the river or stream, the greater the erosion force.

Question 3

01:47

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Question 4

02:33

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Word Bank:

deposited

land

loses

rapid

reservoir

flat

Erosion and deposition can create a area called a "floodplain". When a stream empty's a body of water; such as an ocean, estuary, lake, or its current slows and sediment is . A fan shape pattern is formed called a delta.

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An alluvial fan is created when this stream flows into . They are sometimes associated with flash floods. These fans typically form in mountain regions where there is a change in slope from high to a gradual slope. When the land flattens out, the flow of water energy and deposits sediment in a fan-shape.

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Asemmisa {{asɛmmisaAhyɛnsode}}

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A meander is a in the river. The faster water moving on the outside into the bank.

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On the inside of the curve water moves more slowly and sediment.

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Sometimes a stream may cut a channel and bypasses the meander. This cut off meander may form a lake called an lake.

Groundwater may also be an of erosion. Groundwater may dissolve and carry rock away forming caves . If the roof of cave it can create a sinkhole.