Chapter Questions
Describe the effect on shear strength of the following:a. slope angleb. orientation of planes of weaknessc. water in soild. vegetation
Compare the shear force to the force of gravity (drawing diagrams similar to figure 9.2) for the following situations:a. a vertical cliffb. a flat horizontal planec. a $45^{\circ}$ slope
How does a rotational slide differ from a translational slide?
What role does water play in each of the types of mass wasting?
Why is solifluction more common in colder climates than in temperate climates?
List and explain the key factors that control mass wasting.
What is the slowest type of mass wasting process?a. debris flowb. rockslidec. creepd. rockfalle. avalanche
The largest landslide has taken placea. on the sea floorb. in the Andesc. on active volcanoesd. in the Himalaya
A descending mass moving downslope as a viscous fluid is referred to as aa. fallb. landslidec. flowd. slide
The driving force behind all mass wasting processes isa. gravityb. slope anglec. type of bedrock materiald. presence of waterc. vegetation
The resistance to movement or deformation of soil is itsa. massb. shear strengthc. shear forced. density
Flow of water-saturated soil over impermeable material is calleda. solifluctionb. flowc. slided. fall
A flowing mixture of soil and water, usually moving down a channel is called aa. mudflowb. slidec. falld. earthflow
An apron of fallen rock fragments that accumulates at the base of a cliff is calleda. bedrockb. sedimentc. soild. talus
How does construction destabilize a slope?a. adds weight to the top of the slopeb. decreases water content of the slopec. adds weight to the bottom of the sloped. increases the shear strength of the slope
How can landslides be prevented during construction? (choose all that apply)a. retaining wallsb. cut steeper slopesc. install water drainage systemsd. add vegetation