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CESSWI STUDY GUIDE QUESTIONS AND ANSWERS LATEST UPDATED.
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CESSWI STUDY GUIDE QUESTIONS AND ANSWERS LATEST UPDATED.
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CESSWI STUDY GUIDE QUESTIONS ANDANSWERS LATEST UPDATED.
How long should it be assumed that it will take to develop adequate
vegetative cover
✔✔At least 2 growing seasons
List the benefits for using vegetation to control wind erosion
✔✔Reduces particle detachment and wind velocity
Absorbs the impact of moving particles
What two factors are used to calculate the effectiveness of a sediment and
erosion control plan?
✔✔C-Factor
P-Factor
How are C Factors determined?
✔✔weighted average of erosion control practices found in a sediment and
erosion control plan
How are net P-Factor values determined?
✔✔weighted value of the sediment control practices through which runoff
waters pass at the discharge points
Retaining Walls
✔✔Stabilize the toe of the slope
,Reduce Slope Steepness
Soil Roughening
✔✔Roughens the soil surface by mechanical means
Typically performed parallel to the slop contours and perpendicular to the
direction of the runoff
Types of Soil Roughening
✔✔Track Walking
Scarifying
Stair Stepping
Imprinting
Sheepsfoot rolling
Track Walking
✔✔
Soil Stabilization
✔✔Strengthen Subsurface : Structural and Biotechnical
Disturbed Surface Areas: Vegetative and Non Vegetative Cover
Identify Sediment control practices
✔✔Traps
Basins
Silt Fence
,Stabilized Construction Entrances
Protection of Storm Drain Inlets
Road Stabilization
Turbidity Curtians, etc
Base flood
✔✔Flood or tide having a 1 percent chance of being exceeded in any given
year (100 year flood) . Commonly referred to as standard flood on federal
flood insurance studies
Base floodplain
✔✔Area subject to flooding by the base flood
Base flow
✔✔Flow contribution to a creek by groundwater, during dry periods base
flow constitutes the majority of stream flow
Bed load
✔✔Sediment that moves by rolling, sliding or skipping along the bed and is
essentially in contact with the stream bed
Bedding
✔✔Foundation under a drainage structure
Berm
✔✔A bench or terrace between two slopes
, D load
✔✔Term used in expressing strength of concrete pipe. The cracking d load
represents the test load required to produce a 0.3 mm crack for a length of
300 mm
Endwall
✔✔A wall placed at the end of. A culvert. May serve 3 purposes:
Hold the embankment away from pipe and prevent sloughing into pipe
outlet channel
Provide a wall that will prevent erosion of the roadway
Prevent flotation of the pipe
Ephemeral
✔✔Of brief duration, as the flow of a stream in an arid region
Face
✔✔Outer layer of slope revetments
Fan
✔✔Portion of a cone, sometimes used to emphasize definition of radial
channels. Also reference to spreading out of water or soils associated with
waters leaving a confined channel
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