Mudflows

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Mudflows

• By D.P. and R.N.

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What is a Mudflow?

• A mudflow happens when there is a lot of rain.
  Then the water mixes with sediments in the soil
  and becomes a thick, pasty material and slides
  down a steep slope.

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Where does it occur?

• A mudflow can occur where they have occurred
  before.
• It can also occur at the top of a steep slope or
  at the base of a low area.

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When Mudflows Occur

• It occurs after erosion by water or glaciers.
• Fires leave slopes plain and bare so when rain
  comes, it carries the mud downhill.
• Heavy rains, melted snow, and earthquakes weaken
  the ground.
• The weight of matter can put pressure on the
  slope.

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How and Why

• Loud noises can cause mudflows to occur.
• Volcanic eruptions and other materials can
  weaken the ground causing a mudflow.

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Examples of Mudflows

• One mudflow occurred in
• La Conchita, California in 1995.

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More Examples
This picture of a mudflow occurred on February
2001 in Washington.
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Prevention and Protection

• You can keep safe by planting vegetation.
• Roots hold the dirt in place, also, they
  absorb a lot of water.
• The best thing to do during a mudflow is to
  quickly leave the area.

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Works Cited

• Disaster Relief-What is a Mudslide?
• http//www.disasterrelief.org/Disasters/971008lan
  dslide/
• Information
• Science Voyages/Glencoe McGraw Hill
• Information
• Alton Biggs
• Exploring Earth
• http//www.classzone.com/books/earth_science/terc
  /content/investigations/es1204/es1204page04.cfm
• Information, Pictures