Erosion and Sediment Control BOARD
EVALUATION 2026 GUARANTEED PASS
ANSWERS GRADED A+
● Accelerated Erosion from LDAs. Answer: accounts for 70% of
erosion
● Geologic Erosion. Answer: Accounts for 30% of erosion
● The main objective of ESC programs is to. Answer: minimize
accelerated erosion
● Land clearing, grading, and cut and fill operations. Answer: leaves
soil vulnerable to erosion
● Stormwater Runoff. Answer: is rainwater moving overland. When it
is not concentrated in a channel or pipe, it is considered a nonpoint
source pollution
● After agriculture, Stormwater Runoff is. Answer: the most frequent
pollutant source. It is carrying sediment loads 10-20x as much as
cropland and 100-1000x more than grassland and forest.
, ● Pollutants of Concern (POC) in the Bay include. Answer:
SEDIMENT, nitrogen, and phosphorus
● 5 Stages of Soil Erosion (water) 1. Raindrop. Answer: 1. raindrop -
kinetic (diameter, velocity), churn surface, seals pores, 90%
● 5 Stages of Soil Erosion (water) 2. Sheet. Answer: 2. sheet - shallow,
transports sediment disturbed by raindrops
● 5 Stages of Soil Erosion (water) 3. Rill. Answer: 3. Rill - concentrated
higher velocity and turbulence in low spots (topographic)
● 5 Stages of Soil Erosion (water) 4. Gully. Answer: 4. Gully -
converged rills, may require heavy equipment to repair
● 5 Stages of Soil Erosion (water) 5. Channel. Answer: 5. Channel -
enlarged gullies or existing streambanks destroyed by flow
● Four Factors Influencing Erodibility - 1. Climate. Answer: Winter
rains, last for hours, smaller raindrops.
Summer rains, associated with thunderstorms, can be minutes long,
bigger raindrops.
Temperature, freezing can destroy soil structure, more loose particles.
EVALUATION 2026 GUARANTEED PASS
ANSWERS GRADED A+
● Accelerated Erosion from LDAs. Answer: accounts for 70% of
erosion
● Geologic Erosion. Answer: Accounts for 30% of erosion
● The main objective of ESC programs is to. Answer: minimize
accelerated erosion
● Land clearing, grading, and cut and fill operations. Answer: leaves
soil vulnerable to erosion
● Stormwater Runoff. Answer: is rainwater moving overland. When it
is not concentrated in a channel or pipe, it is considered a nonpoint
source pollution
● After agriculture, Stormwater Runoff is. Answer: the most frequent
pollutant source. It is carrying sediment loads 10-20x as much as
cropland and 100-1000x more than grassland and forest.
, ● Pollutants of Concern (POC) in the Bay include. Answer:
SEDIMENT, nitrogen, and phosphorus
● 5 Stages of Soil Erosion (water) 1. Raindrop. Answer: 1. raindrop -
kinetic (diameter, velocity), churn surface, seals pores, 90%
● 5 Stages of Soil Erosion (water) 2. Sheet. Answer: 2. sheet - shallow,
transports sediment disturbed by raindrops
● 5 Stages of Soil Erosion (water) 3. Rill. Answer: 3. Rill - concentrated
higher velocity and turbulence in low spots (topographic)
● 5 Stages of Soil Erosion (water) 4. Gully. Answer: 4. Gully -
converged rills, may require heavy equipment to repair
● 5 Stages of Soil Erosion (water) 5. Channel. Answer: 5. Channel -
enlarged gullies or existing streambanks destroyed by flow
● Four Factors Influencing Erodibility - 1. Climate. Answer: Winter
rains, last for hours, smaller raindrops.
Summer rains, associated with thunderstorms, can be minutes long,
bigger raindrops.
Temperature, freezing can destroy soil structure, more loose particles.
