Virginia Erosion and Sediment Control
Inspector Exam with Questions and
Correct Answers 100% Pass
Erosion Impact Area - CORRECT ANSWERS area of land NOT ASSOCIATED
with a current land- disturbing activity but contributing to sedimentation
How much more soil loss occurs from construction sites versus natural soil
erosion rates? Agricultural land? - CORRECT ANSWERS 1000 times more than
the average natural soil erosion rate.
20 times more than agricultural land.
What are 4 erosive forces? - CORRECT ANSWERS wind
water
ice
gravity
Name and define 5 stages of soil erosion. - CORRECT ANSWERS Raindrop-
90% of total soil erosion
Sheet- the soils ability to infiltrate water is exceeded and it runs in sheet flow
(about 100 ft before concentrating), how sediment gets transported
Rill- when sheet flow begins to concentrate, velocity and turbulence increase,
but easily repaired
Gully-when rills converge, larger than rill and usually requires heavy equipment
to repair
Channel- large volume of water increases the gully, vertical sides are observed
or for an existing streambed when structural integrity is destroyed
What are the factors of rainfall impact? - CORRECT ANSWERS Kinetic energy is
dependent on rainfall amount/intensity, raindrop diameter, and raindrop
velocity
What are two damaging effects of rainfall impact? - CORRECT ANSWERS
Causes soil compression which reduces infiltration
Mainly occurs in May-Sept which is when disturbance is most active
4 factors influencing erosion - CORRECT ANSWERS climate
groundcover (influenced by humans)
soil properties
topography (influenced by humans)
Inspector Exam with Questions and
Correct Answers 100% Pass
Erosion Impact Area - CORRECT ANSWERS area of land NOT ASSOCIATED
with a current land- disturbing activity but contributing to sedimentation
How much more soil loss occurs from construction sites versus natural soil
erosion rates? Agricultural land? - CORRECT ANSWERS 1000 times more than
the average natural soil erosion rate.
20 times more than agricultural land.
What are 4 erosive forces? - CORRECT ANSWERS wind
water
ice
gravity
Name and define 5 stages of soil erosion. - CORRECT ANSWERS Raindrop-
90% of total soil erosion
Sheet- the soils ability to infiltrate water is exceeded and it runs in sheet flow
(about 100 ft before concentrating), how sediment gets transported
Rill- when sheet flow begins to concentrate, velocity and turbulence increase,
but easily repaired
Gully-when rills converge, larger than rill and usually requires heavy equipment
to repair
Channel- large volume of water increases the gully, vertical sides are observed
or for an existing streambed when structural integrity is destroyed
What are the factors of rainfall impact? - CORRECT ANSWERS Kinetic energy is
dependent on rainfall amount/intensity, raindrop diameter, and raindrop
velocity
What are two damaging effects of rainfall impact? - CORRECT ANSWERS
Causes soil compression which reduces infiltration
Mainly occurs in May-Sept which is when disturbance is most active
4 factors influencing erosion - CORRECT ANSWERS climate
groundcover (influenced by humans)
soil properties
topography (influenced by humans)
