Virginia Erosion And Sediment Control Inspector Exam Questions And Correct Answers

VIRGINIA EROSION AND SEDIMENT
CONTROL INSPECTOR EXAM
QUESTIONS AND CORRECT
ANSWERS



Erosion Impact Area - ans-area of land NOT ASSOCIATED with a current land-
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disturbing activity but contributing to sedimentation
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How much more soil loss occurs from construction sites versus natural soil erosion r
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ates? Agricultural land? - ans-
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1000 times more than the average natural soil erosion rate.
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20 times more than agricultural land.
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What are 4 erosive forces? - ans-wind
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water
ice
gravity

Name and define 5 stages of soil erosion. - ans-Raindrop- 90% of total soil erosion
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Sheet-
wsthe soils ability to infiltrate water is exceeded and it runs in sheet flow (about 100 ft
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wsbefore concentrating), how sediment gets transported
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Rill-
wswhen sheet flow begins to concentrate, velocity and turbulence increase, but easily
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repaired
Gully-
when rills converge, larger than rill and usually requires heavy equipment to repair
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Channel-
wslarge volume of water increases the gully, vertical sides are observed or for an exis
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ting streambed when structural integrity is destroyed
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What are the factors of rainfall impact? - ans-
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Kinetic energy is dependent on rainfall amount/
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intensity, raindrop diameter, and raindrop velocity
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What are two damaging effects of rainfall impact? - ans-
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Causes soil compression which reduces infiltration
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