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Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

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Chapter 15 Mass Wasting: The Work of Gravity
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Page 1: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Chapter 15 Mass Wasting:

The Work of Gravity

Page 2: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

La Conchita, California

Page 3: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.
Page 4: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.
Page 5: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

La Conchita, California

Landslide prone Coastal Community35,000 ya6,000 yaNumerous events in 1800’s19952005

SolutionRelocate residents

Page 6: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Mass Wasting

Downslope movement of rock/soilNeed slopeNeed gravity

Page 7: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Mass Wasting

Natural occurrenceProblematic when “we are in the way”Large scale events are rareTotal effects of small events are huge20-50 deaths in US annually$1-2 billion annually

Page 8: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Mass Wasting

Does this happen on Long Island?North Shore or South Shore? Increasing or decreasing on Long Island?

Page 9: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Earthquake creates landslide, India - 2005

Page 10: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Rain causes mudflow & buries town

Phillipines

Page 11: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.
Page 12: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Grand Canyon

Page 13: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.
Page 14: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.
Page 15: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.
Page 16: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Angle of Repose

Page 17: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Wildfires, California

Page 18: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.
Page 19: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.
Page 20: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Causes

Removal of vegetationVibrationIncrease slopeExcess moisture

Page 21: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

Prevention

Remove excess moistureProvide vegetationMinimize slopeConstruct retaining wall

Page 22: Chapter 15 Mass Wasting: The Work of Gravity. La Conchita, California.

End of Chapter 15


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