Sedimentation and erosion control
certification Exam Rated 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 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%
Never service construction equipment near a live stream, use storm water sewers
instead T/F - Answer- False
A temporary gravel construction entrance must extend the full width of the entrance. It
must be at least _____ ft long and _____ in thick. Aggregate should be _____ in stone
or FDOT No. _____ stone - Answer- 50, 6, 2, 1
Prior to installing gravel entrance ______ should be placed on the ground and
maintenance should be performed when the voids are full of ______ - Answer-
geotextile, sediment
Max drainage are for a silt fence under _____ flow conditions is ____ acre per 100 ft of
barrier length - Answer- sheet, 1/4
The average usable life of a silt fence is ____ months - Answer- 6
For proper installation of silt fence a trench ____ by _____ must be excavated. This will
allow_______ of fabric to extend into the ground for back-filling and compaction -
Answer- 4, 4, 8
Max drainage area for an inlet protection is ______ - Answer- 1 acre
certification Exam Rated 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 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%
Never service construction equipment near a live stream, use storm water sewers
instead T/F - Answer- False
A temporary gravel construction entrance must extend the full width of the entrance. It
must be at least _____ ft long and _____ in thick. Aggregate should be _____ in stone
or FDOT No. _____ stone - Answer- 50, 6, 2, 1
Prior to installing gravel entrance ______ should be placed on the ground and
maintenance should be performed when the voids are full of ______ - Answer-
geotextile, sediment
Max drainage are for a silt fence under _____ flow conditions is ____ acre per 100 ft of
barrier length - Answer- sheet, 1/4
The average usable life of a silt fence is ____ months - Answer- 6
For proper installation of silt fence a trench ____ by _____ must be excavated. This will
allow_______ of fabric to extend into the ground for back-filling and compaction -
Answer- 4, 4, 8
Max drainage area for an inlet protection is ______ - Answer- 1 acre
