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Questions and Answers
What was the purpose of David Varnes' 1978 proposal?
What is the term used to describe blocks coming away by rotation from a vertical face?
What type of landslide involves the movement of a body of material that remains intact while moving over one or several inclined surfaces?
What is the term used to describe a layer of material cracking, opening up, and expanding laterally?
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What is the term used to describe the movement of fluidized material, which can be both dry or rich in water?
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What type of movement can affect entire mountain slopes or portions of it?
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What can occur when a landslide initiates as a rock fall or topple and then transforms into a debris slide or flow?
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How many types of movement are recognized in the Hungr-Leroueil-Picarelli classification?
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What is the primary driving force behind a landslide?
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What is the term used to describe the reduction of landslide risks and impacts?
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What can trigger a landslide in many cases?
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What can lead to a decrease in the shear strength of slope material?
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What is the term used to describe the process of mass wasting that includes rockfalls, mudflows, and debris flows?
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What is the result of a decrease in the shear strength of slope material or an increase in the shear stress borne by the material?
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Where can landslides occur?
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What can global warming caused by climate change increase?
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Study Notes
Landslides and Human Development
- Human activities such as urban sprawl, mining, and deforestation can exacerbate landslides
- Land degradation can lead to reduced stabilization of soil by vegetation, making it more prone to landslides
Landslide Mitigation
- Landslide mitigation involves policies and practices to reduce the risk of landslides and their impact on human populations
Causes of Landslides
- Gravity is the primary driving force behind landslides
- Other factors affecting slope stability can produce conditions that make a slope prone to failure
- Landslides can be triggered by specific events such as heavy rainfall, earthquakes, or slope cuts for road construction
Types of Landslides
Hungr-Leroueil-Picarelli Classification
- Six types of landslide movements are recognized: falls, topples, slides, spreads, flows, and slope deformations
- Each type can occur in both rock and soil
- Falls involve isolated blocks or chunks of soil in free-fall
- Topple refers to blocks coming away by rotation from a vertical face
- Slides involve the movement of a body of material that remains intact while moving over inclined surfaces
- Slides can be sub-classified as planar or rotational
- Spreads involve the cracking, opening, and lateral expansion of a layer of material
- Flows involve the movement of fluidized material, which can be dry or water-rich
- Slope deformations are slow, distributed movements that can affect entire mountain slopes
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Description
This quiz explores how human activities and climate change contribute to landslides and land degradation, and discusses ways to mitigate the risk.
