Virginia Erosion and Sediment Control |\ |\ |\ |\ |\
Inspector Exam questions with answers |\ |\ |\ |\
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) |\ |\ |\
What percent reduction occurs from vegetative cover? -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔90-99% |\ |\
What are soil properties? - CORRECT ANSWERS ✔✔Structure
|\ |\ |\ |\ |\ |\ |\ |\
(particles adhere) |\
Texture (size) |\
Bulk density (how tightly packed)
|\ |\ |\ |\
% organic matter
|\ |\
infiltration (into soil) |\ |\
Inspector Exam questions with answers |\ |\ |\ |\
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) |\ |\ |\
What percent reduction occurs from vegetative cover? -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔90-99% |\ |\
What are soil properties? - CORRECT ANSWERS ✔✔Structure
|\ |\ |\ |\ |\ |\ |\ |\
(particles adhere) |\
Texture (size) |\
Bulk density (how tightly packed)
|\ |\ |\ |\
% organic matter
|\ |\
infiltration (into soil) |\ |\
