SEDIMENTATION AND EROSION
CONTROL CERTIFICATION QUESTIONS
AND ANSWERS (GRADED A+)
Erosion - ANSWER-is the process by which land surface is worn away by the action of
wind, water, and gravity.
Sedimentation - ANSWER-is the settling of soil particles
Soil erosion is classified as either ____ erosion or ____ erosion - ANSWER-wind , water
Water erosion can be classified as either ______ erosion or _____ erosion - ANSWER-
overland , stream
Four processes of overland erosion - ANSWER-splash erosion, sheet erosion, rill
erosion, gully erosion
Four principle factors influencing soil erosion are - ANSWER-soil characteristics,
vegetative cover, topography, climate
Physical effects of erosion and sedimentation - ANSWER-increase flooding, reduce
hydraulic capacity, increased maintenance of storm water systems, increased water
treatment costs, decreased recreational value
Biological effects of erosion and sedimentation - ANSWER-reduced light for aquatic
plants, clogs fish gills, impairs spawning, disrupts food chain, blankets bottom, disrupts
ecosystem
Minimize the _______ of the area exposed at one time and the ______ of exposure -
ANSWER-extent, duration
Apply __________ practices to protect the disturbed area from off-site runoff and to
protect off-site areas from sediment damage - ANSWER-perimeter control
Apply ________ practices to prevent excessive on site damage - ANSWER-erosion
control
Keep runoff velocities _____ and _____ runoff on site - ANSWER-low , retain
Stabilize disturbed areas ________ after final grading - ANSWER-inmediately
, Implement a thorough ____ and ____ (inspection) program - ANSWER-maintenance,
follow up
Type A soils have ___ infiltration rates and ___ runoff potential. Examples - ANSWER-
high, low (Sand)
Type D soils have _____ infiltration rates and _______ runoff potential. Examples -
ANSWER-low, high (muck, clay)
Based on EPA guidance, FDEP has determined that ______ also meet the definition of
construction activities - ANSWER-demolition
Any type of soil disturbance over 1 acre must get ______ permit - ANSWER-CGP
(Construction Generic Permit)
A CGP is required for projects that disturb _____ or more acres of land - ANSWER-1
The max spacing between check dams should be at the _____ of upstream dam is at
the same elevation as the ______ top of the downstream dam - ANSWER-bottom, top
A floating turbidity curtain is designed to contain sediment laden water and allow
enough ____ for sediments to settle out to suspension - ANSWER-time
A type III floating turbidity curtain may be used in considerable flow conditions meaning
less than _____ ft/s or _____ knots - ANSWER-5, 3
Turbidity curtains should be placed _____ to the direction of flow - ANSWER-parallel
Anchor lines shall be attached to ____ not to the bottom of the curtain float - ANSWER-
buoys
In tidal or wind and wave conditions there should be a ____ gap between the bottom of
the curtain and the floor of the water body. - ANSWER-1 foot
The CGP permit requires inspections how often? - ANSWER-weekly and within 24
hours of the end of a storm 1/2 inch or greater
A storm water event with a ______ hour break in between is still considered one storm
water event - ANSWER-4
The CGP permit requires sediment basins for areas _____ or more - ANSWER-10
acres
Any BPM that collects sediment must be cleaned before it reaches _____ of it's capacity
- ANSWER-50%
CONTROL CERTIFICATION QUESTIONS
AND ANSWERS (GRADED A+)
Erosion - ANSWER-is the process by which land surface is worn away by the action of
wind, water, and gravity.
Sedimentation - ANSWER-is the settling of soil particles
Soil erosion is classified as either ____ erosion or ____ erosion - ANSWER-wind , water
Water erosion can be classified as either ______ erosion or _____ erosion - ANSWER-
overland , stream
Four processes of overland erosion - ANSWER-splash erosion, sheet erosion, rill
erosion, gully erosion
Four principle factors influencing soil erosion are - ANSWER-soil characteristics,
vegetative cover, topography, climate
Physical effects of erosion and sedimentation - ANSWER-increase flooding, reduce
hydraulic capacity, increased maintenance of storm water systems, increased water
treatment costs, decreased recreational value
Biological effects of erosion and sedimentation - ANSWER-reduced light for aquatic
plants, clogs fish gills, impairs spawning, disrupts food chain, blankets bottom, disrupts
ecosystem
Minimize the _______ of the area exposed at one time and the ______ of exposure -
ANSWER-extent, duration
Apply __________ practices to protect the disturbed area from off-site runoff and to
protect off-site areas from sediment damage - ANSWER-perimeter control
Apply ________ practices to prevent excessive on site damage - ANSWER-erosion
control
Keep runoff velocities _____ and _____ runoff on site - ANSWER-low , retain
Stabilize disturbed areas ________ after final grading - ANSWER-inmediately
, Implement a thorough ____ and ____ (inspection) program - ANSWER-maintenance,
follow up
Type A soils have ___ infiltration rates and ___ runoff potential. Examples - ANSWER-
high, low (Sand)
Type D soils have _____ infiltration rates and _______ runoff potential. Examples -
ANSWER-low, high (muck, clay)
Based on EPA guidance, FDEP has determined that ______ also meet the definition of
construction activities - ANSWER-demolition
Any type of soil disturbance over 1 acre must get ______ permit - ANSWER-CGP
(Construction Generic Permit)
A CGP is required for projects that disturb _____ or more acres of land - ANSWER-1
The max spacing between check dams should be at the _____ of upstream dam is at
the same elevation as the ______ top of the downstream dam - ANSWER-bottom, top
A floating turbidity curtain is designed to contain sediment laden water and allow
enough ____ for sediments to settle out to suspension - ANSWER-time
A type III floating turbidity curtain may be used in considerable flow conditions meaning
less than _____ ft/s or _____ knots - ANSWER-5, 3
Turbidity curtains should be placed _____ to the direction of flow - ANSWER-parallel
Anchor lines shall be attached to ____ not to the bottom of the curtain float - ANSWER-
buoys
In tidal or wind and wave conditions there should be a ____ gap between the bottom of
the curtain and the floor of the water body. - ANSWER-1 foot
The CGP permit requires inspections how often? - ANSWER-weekly and within 24
hours of the end of a storm 1/2 inch or greater
A storm water event with a ______ hour break in between is still considered one storm
water event - ANSWER-4
The CGP permit requires sediment basins for areas _____ or more - ANSWER-10
acres
Any BPM that collects sediment must be cleaned before it reaches _____ of it's capacity
- ANSWER-50%
