GEOL 101 Lecture Notes - Lecture 10: Retaining Wall, Mudflow, Ashwater

36 views3 pages
31 Oct 2016
School
Department
Course
Professor
Term
Person
Theory
Place
Objectives:
Define Natural Hazard and Natural Disaster
Explain the basic characteristics of Natural Hazards
Define Mass Wasting
Describe the competing forces that cause materials to move
Categorize the different types of Mass Wasting
Outline the factors that control Mass Wasting and slope failure
Outline ways to prevent slope failure
Natural Hazard: phenomenon with potential to cause death/damage
Earthquake, volcano, flood, storms, landslides, mass wasting
Natural Disaster: when natural hazard causes significant damage to life/property
Characteristics of Natural Hazard
Not randomly distributed
When natural hazards coincide, they amplify the scope of the disaster
Earthquake causes landslide
Unpredictable….for now!
Magnitude of event is inversely proportional to its frequency
Larger the event, less likely it will happen
Past events can create conditions that alter future events
Earth’s External Processes
Surface processes are responsible for the movement and transport of Earth’s material
Weathering: physical breakdown/chemical alteration of rock at/near the Earth’s surface
Mass movement (wasting): transfer of rock/soil down slope under the influence of gravity
Erosion: physical removal of material by mobile agents (water, wind, ice, gravity)
Mass Wasting
Refers to downslope movement of rock, regolith, and soil under the direct influence of gravity
Potential for death/destruction
Lots of them! Wow! Not just landslides!
Competing forces
Perpendicular (normal) to surface = contributes to friction
Parallel (shear) to surface = contributes to sliding
Gravity: pulls object towards earths center
Small amounts of water
Glue particles together (surface tension)
Lots of water
Reduces friction
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows page 1 of the document.
Unlock all 3 pages and 3 million more documents.

Already have an account? Log in

Document Summary

Explain the basic characteristics of natural hazards. Describe the competing forces that cause materials to move. Categorize the different types of mass wasting. Outline the factors that control mass wasting and slope failure. Natural hazard: phenomenon with potential to cause death/damage. Earthquake, volcano, flood, storms, landslides, mass wasting. Natural disaster: when natural hazard causes significant damage to life/property. When natural hazards coincide, they amplify the scope of the disaster. Magnitude of event is inversely proportional to its frequency. Larger the event, less likely it will happen. Past events can create conditions that alter future events. Surface processes are responsible for the movement and transport of earth"s material. Weathering: physical breakdown/chemical alteration of rock at/near the earth"s surface. Mass movement (wasting): transfer of rock/soil down slope under the influence of gravity. Erosion: physical removal of material by mobile agents (water, wind, ice, gravity) Refers to downslope movement of rock, regolith, and soil under the direct influence of gravity.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents