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323: Geological Hazards > 6: Slopes Intro > Flashcards

6: Slopes Intro Flashcards

1
Q

What is the equation for risk?

A

Risk = Hazard x Population (or value) x Vulnerability

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2
Q

We can quantify landslide hazard by the equation landslide hazard = what?

A

(susceptibility) * (trigger conditions)

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3
Q

What are the three main elements to susceptibility of landslide hazards?

A

Slope, Geology, Soil Moisture

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4
Q

What are the three main elements to trigger conditions of landslide hazards?

A

Seismic, Rainfall, Human

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5
Q

Landslide prediction models only have __ to __% success?

A

15-30%

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6
Q

What is the primary driving force of landslides?

A

Gravity

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7
Q

What does rotational slide look like, and what is another word for it?

A

Slump

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8
Q

What does lateral spreading slide look like?

A
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9
Q

What does block slide look like?

A
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10
Q

What does cambering look like?

A
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11
Q

What does a sand run look like?

A
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12
Q

What does an earth flow look like?

A
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13
Q

What does debris avalanche look like?

A
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14
Q

What does rock and debris creep look like?

A
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15
Q

What five material factors directly relate to landslide risk?

A

(1) Rock and soil strength (2) Existing fissures (3) Clay mineral composition (4) Particle size (5) Prior history of material

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16
Q
  1. What four environmental factors directly relate to landslide risk?
A

Slope angle, water, time, vegetation

17
Q

Name an additional trigger mechanism other than rainfall, earthquakes or human slope modifications

A

Changing conditions (such as dry to wet, frozen to warm)

18
Q

Give an example of human slope modification

A

Construction or excavation

19
Q

When and where did the world’s worst dam-related disaster occur?

A

1963, three years after completion: Vaiont Dam, Northern Italy

20
Q

What was the trigger of the world’s worst dam-related disaster?

A

Raised water level in the reservoir and 11 days of heavy rain

21
Q

What did the preliminary seismic study of the area in which the worlds worst dam-related disaster occurred show?

A

Rock strength was good

22
Q

What was the final slide velocity of the 1963 world’s worst dam-related disaster?

A

~30 m/s

23
Q

What was the material behavior of the rock surrounding the dam which was home to the world’s worst dam-related disaster?

A

Clay layers, which had weak points

24
Q

What was important about the geological history surrounding the dam which was home to the world’s worst dam-related disaster?

A

Previous slides lowered the strength of the material in the surrounding valley

25
Q

The ___ ___ in the valley slopes were inadequately measured at the location were the world’s worst dam-related disaster occurred

A

Pore pressure

323: Geological Hazards (7 decks)

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