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CEPSCI Exam: Questions And Proper Answers
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CEPSCI Exam: Questions And Proper Answers
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CEPSCI Exam: Questions And Proper AnswersErosion prevention and sediment control importances Right Ans – storm
water runoff is leading cause of impaired water in South Carolina
protects downstream surface water and aquatic habitats
it is the law
Erosion Right Ans - the process by which the land surface is worn away by
the action of water, wind, ice, and gravity
Two types of erosion Right Ans - natural and accelerated
Natural erosion Right Ans - also known as geologic erosion - relatively slow
most rapid along shorelines and stream channels
30% of eroded sediment in the US
Accelerated erosion Right Ans - elevated rate because of human activity
agriculture, timber harvesting, and construction are primary contributors
70% of eroded sediment in US
Factors that influence erosion Right Ans - Climate
Season
Vegetative Cover
Topgraphy
Soil Characteristics
Climate (influence of erosion) Right Ans - frequency, intensity, and
duration of rainfall for a region
Season influence of erosion Right Ans - more intense storms in summer
Vegetative cover influence on erosion Right Ans - most controllable - slows
down erosion and helps divide water and sediment
Soil characteristics influence on erosion Right Ans - texture
percentage of organic content
structure
permeability
, sedimentation Right Ans - the process by which eroded material is
transported and deposited
negative impacts of sedimentation Right Ans - screens out sunlight and
reduces water clarity
fills channels and reduces capacity
pollutants attached to sediment can impact downstream water quality
construction site pollutants Right Ans - sediment
oil and grease
pesticides and fertilizers
pollutants from waste and materials
storm water runoff measures (BMP) Right Ans - pipe slop drain
runoff diversion measures
temporary stream crossing
construction dewatering
buffers and flow control
pipe slope drain Right Ans - elevation to elevation - used when it is
necessary for water to flow down slope without causing erosion especially
before slope is stabilized or permanent drainage is in place
characteristics of pipe slope drains Right Ans - inlet protection
down slope
stakes 10ft apart or SWPPP guidelines
non perforated corrugated plastic pipe
stabilize outlet (velocity dissipation, riprap, rock, concrete in SWPPP)
runoff diversion measures Right Ans - diversion dikes and berms (ridges in
compacted soil)
use to divert upslope clean water runoff from crossing areas with high risk of
erosion
runoff diversion measures - temporary silt ditches or swales Right Ans -
runoff measure- excavated shallow channels used to direct sediment laden
runoff into sediment control BPM
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