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Mass movement hazards - Woordenlijst

6 important questions on Mass movement hazards - Woordenlijst

What is the definition of a debris flow?

Movements of fluidized soil and rock fragments acting as a thick, syrupy mass. They establish when loose materials become soaked and start to behave as a fluid, rather than a solid.

What is an explanation of 'regrading' in its context?

the landslide threat can often be reduced / minimized by decreasing the overall slope angle by place extra material at the toe or digging out the upper parts of the slope.

What do geotechnical techniques do?

use mathematical slope-stability equations to determine the likelihood of slope failure. GIS is often used where parameters as strength of the soil, the angle of the slope and the depth of the water table are used.

What is a powder avalanche?

the most hazardous types of avalanches that are formed of an aerosol of fine, diffused snow which behaves like a body of gas. They are not influenced by obstacles in their path and are more destructive than windstorms. In this case, an aerosol is water, unlike you have learned in a previous subject.

What are retention structures?

common adaptations to avalanches throughout the world, of which retention structure is one. It is designed to trap and retain snow on a slope and so prevent an avalanche from happening completely.

What are the five terrains where landslides are concentrated?

- Upland areas subject to seismic shaking
- Mountainous environments with high relative relief
- Areas of moderate relief suffering severe land degradation
- Areas with high rainfall
- Areas with thick deposits of fine-grained materials

The question on the page originate from the summary of the following study material:

Environmental Hazards Assessing Risk and Reducing Disaster | 9780415681056 | Keith Smith

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