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Virginia Erosion and Sediment Control Inspector Exam Questions And Revised Correct Answers

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Virginia Erosion and Sediment Control Inspector Exam Questions And Revised Correct Answers Erosion Impact Area - ANSWER : 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? - ANSWER : 1000 times more than the average natural soil erosion rate. 20 times more than agricultural land. What are 4 erosive forces? - ANSWER : wind water ice gravity Name and define 5 stages of soil erosion. - ANSWER : 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


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