EOSC 210 EXAM QUESTIONS WITH 100% CORRECT ANSWERS UPDATED 2024/2025
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Course
EOSC 210
Institution
EOSC 210
EOSC 210 EXAM QUESTIONS WITH 100% CORRECT ANSWERS UPDATED 2024/2025
How does pore pressure effect LS - Answer- high pore pressure adversely affects stability of slope because there is a decrease in effective stress
What are triggers for a LS - Answer- rainfall, snowmelt, volcano, EQ, etc.
W...
EOSC 210 EXAM QUESTIONS WITH
100% CORRECT ANSWERS
UPDATED 2024/2025
How does pore pressure effect LS - Answer- high pore pressure adversely affects
stability of slope because there is a decrease in effective stress
What are triggers for a LS - Answer- rainfall, snowmelt, volcano, EQ, etc.
What does a LS trigger do - Answer- initiates failure
What does precipitation do in a LS - Answer- increases pore water pressure, so less
effective stress, and causes LS
What are types of LS mitigation - Answer- avoid, prevention, protection, mitigation
LS avoid - Answer- relocate
LS prevention - Answer- reduce driving force by 1) increasing resisting force(ie remove
top mass, stabilize bottoms etc.)
2) drainage : take out water at bottom to stop LS
LS protection - Answer- make structures that stop moving mass before damage
LS mitigation - rockfall protection - Answer- let it fall, control distance and direction of
travel
LS mitigation - debris flow protection - Answer- 1) remove debris from flow mass
(barriers)
2) prevent more debris from being entrained (concrete lined channel)
3) decrease flow velocity (ad filter?)
what is Canadas largest energy course - Answer- hydroelectricity 65%
pros to hydroelectric dams - Answer- - long life
- low cost
- no emissions
- renewable energy (potential)
cos to hydroelectric dams - Answer- - high capital cost
- long construction times
, - negative habitate affects
- threat to communities downstream
dam terminology - Answer- draw (LD22) pg 10
- MWL (Max water level)
- NWL (normal water level)
- gallery (for checking operations)
- spillway (to relieve excess water downstream)
- sluiceway(uses to clear silt accumulation)
-toe (downstream side)
- heal (upstream side)
cofferdam - Answer- temporary barrier that redirects water into diversion tunnel so that
you can build a dam
abutments - Answer- sides of valley that the dam rests on
foundation - Answer- floor of valley that dam sits on
diversion tunnel - Answer- this is built before the dam is built to have a place for water to
run through when dam is being built
three types of dams - Answer- - concrete dams
- earth dams
- composite (both C and E)
dam design issues - Answer- - dam stability (foundation failure and overturning/sliding)
- spillway (dissipate energy (downstream erosion)
- dam leakage (erosion of dam material in earth dams)
- reservoir slopes (landslide generated waves)
concrete dam types - Answer- - gravity
- arch
- buttress
- concrete face
pros to concrete dam - Answer- - more resistance to compressive forces, much less
water erosion, less overtopping, can be shaped based on load, can minimize concrete
use by making curved
cons to concrete dam - Answer- - expensive
- labor intensive
- low tensile strength so susceptible to differential settlements
- need lots of sand gravel and aggregate
- need local concrete plants
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