Exam 8: Mass Movements

Rainfall intensity and duration affect the likelihood of the occurrence of mass movement.Which of the following is true?

Which of the following is a common "trigger" of landslides?

In landslide-prone areas,whether a given rainstorm will cause sliding may depend,in part,on the amount of rainfall in the recent past,too.

Reduction of the slide potential of a very steep slope can be carried out by

Weathering process do exert some influence on mass wasting.

A kind of mass movement in which materials move in a disorganized,chaotic fashion is a

In the Vaiont Reservoir disaster,flooding resulted when water rushed over the dam due to a large landslide.

Mass wasting threatens only property,not lives,because it occurs so slowly.

What is the most important process for the loosening and braking up of consolidated rock in high,mountainous regions?

Which of the following is not a type of flow?

In designing a retaining wall to support an unstable slope,the best design would be

Vegetation may

Rock falls and rock slides occur in Yosemite National Park because slopes over steepened by past glaciations are readjusting to lower,safer slope angles.

If a slope in unconsolidated material is unstable due to high water content,

An over steepened slope

The type of clay that can absorb water up to twenty times its weight and results in the formation of a weak gel is

Localized areas of high landslide risk may occur within regions of overall low risk.

A landslide warning system recently tested in California could identify the areas at risk,but could not predict the time of probable sliding.

Landslides may be triggered by earthquakes or by heavy rains.

Sites of past rock falls or slides are sometimes obvious because they remain unagitated.