Virginia Erosion and Sediment Control Inspector Exam with
Verified Answers
1. Erosion Impact Area area of land NOT ASSOCIATED with a cur-
rent land- disturbing activity but contributing
to sedimentation
2. How much more soil loss oc- 1000 times more than the average natural
curs from construction sites soil erosion rate.
versus natural soil erosion 20 times more than agricultural land.
rates? Agricultural land?
3. What are 4 erosive forces? wind
water
ice
gravity
4. Name and define 5 stages of Raindrop- 90% of total soil erosion
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
5. What are the factors of rainfall Kinetic energy is dependent on rainfall
impact? amount/intensity, raindrop diameter, and
raindrop velocity
6. What are two damaging ef- Causes soil compression which reduces in-
fects of rainfall impact? filtration
Mainly occurs in May-Sept which is when
disturbance is most active
7. 4 factors influencing erosion
1/5
, Virginia Erosion and Sediment Control Inspector Exam with
Verified Answers
climate
groundcover (influenced by humans)
soil properties
topography (influenced by humans)
8. What percent reduction oc- 90-99%
curs from vegetative cover?
9. What are soil properties? Structure (particles adhere)
Texture (size)
Bulk density (how tightly packed)
% organic matter
infiltration (into soil)
permeability (through soil)
10. What is K factor? the susceptibility of a particular soil to ero-
sion
developed by permeability, soil texture, soil
structure, and organic matter content
low K factor is low erodibility (0-0.23), and
high is (0.37 +)
11. What is a variance? granted by the VESCP authority to waive or
modify a requirement if it is too restrictive
can request during plan submission or dur-
ing construction. if no reply after 10 days,
then denied.
12. What is regulated land dis- greater than or equal to 10,000 square ft
turbing activity?
2500 in chesapeake bay preservation area
13. county use bonds returned within 60 days of adequate stabi-
lization
can't be more than 25% of estimated cost
2/5
Verified Answers
1. Erosion Impact Area area of land NOT ASSOCIATED with a cur-
rent land- disturbing activity but contributing
to sedimentation
2. How much more soil loss oc- 1000 times more than the average natural
curs from construction sites soil erosion rate.
versus natural soil erosion 20 times more than agricultural land.
rates? Agricultural land?
3. What are 4 erosive forces? wind
water
ice
gravity
4. Name and define 5 stages of Raindrop- 90% of total soil erosion
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
5. What are the factors of rainfall Kinetic energy is dependent on rainfall
impact? amount/intensity, raindrop diameter, and
raindrop velocity
6. What are two damaging ef- Causes soil compression which reduces in-
fects of rainfall impact? filtration
Mainly occurs in May-Sept which is when
disturbance is most active
7. 4 factors influencing erosion
1/5
, Virginia Erosion and Sediment Control Inspector Exam with
Verified Answers
climate
groundcover (influenced by humans)
soil properties
topography (influenced by humans)
8. What percent reduction oc- 90-99%
curs from vegetative cover?
9. What are soil properties? Structure (particles adhere)
Texture (size)
Bulk density (how tightly packed)
% organic matter
infiltration (into soil)
permeability (through soil)
10. What is K factor? the susceptibility of a particular soil to ero-
sion
developed by permeability, soil texture, soil
structure, and organic matter content
low K factor is low erodibility (0-0.23), and
high is (0.37 +)
11. What is a variance? granted by the VESCP authority to waive or
modify a requirement if it is too restrictive
can request during plan submission or dur-
ing construction. if no reply after 10 days,
then denied.
12. What is regulated land dis- greater than or equal to 10,000 square ft
turbing activity?
2500 in chesapeake bay preservation area
13. county use bonds returned within 60 days of adequate stabi-
lization
can't be more than 25% of estimated cost
2/5
