Erosion and Sediment Control Exam
Questions With Passed Solutions!!!
erosion CORRECT ANSWERS transport of soil particles by water, wind, and gravity
sediment CORRECT ANSWERS by-product of the erosion process; particles in
suspension that have been relocated
construction of new developments can drastically change natural surface runoff patterns
because (4 things) CORRECT ANSWERS - remove the vegetative cover
- disturb the soil
- change the land slopes
- decrease time of concentration of the site through storm drains, open channels, and
paved roads/gutters
soil erosion and sedimentation process (3 steps) CORRECT ANSWERS - soil particles
detach from the soil mass
- water or wind of sufficient energy picks up and transports particles
- soil deposition
keys to sediment/erosion control (2 things) CORRECT ANSWERS - prevent initial
detachment of the soil particles
- reduce runoff velocity
detachment CORRECT ANSWERS most often occurs when the energy of a raindrop
impacting the ground is sufficient to breakdown the soil aggregates and project them
into the air, leading to more particle detachment
detachment occurs when CORRECT ANSWERS KE of the raindrop > total energy
holding the soil in place
transport CORRECT ANSWERS stormwater runoff will then pick up the soil particles
sheetflow CORRECT ANSWERS once the soil becomes saturated and depression
storage fills, puddles begin to overflow
rill flow CORRECT ANSWERS runoff from sheetflow moves downslope, begins to flow
in more defined, small channels. momentum of runoff increases, causing an increase in
erosive potential
gullies CORRECT ANSWERS steep sided channels form due to the erosion. usually not
an issue as much for construction projects as the earthwork operations would prevent
formation
Questions With Passed Solutions!!!
erosion CORRECT ANSWERS transport of soil particles by water, wind, and gravity
sediment CORRECT ANSWERS by-product of the erosion process; particles in
suspension that have been relocated
construction of new developments can drastically change natural surface runoff patterns
because (4 things) CORRECT ANSWERS - remove the vegetative cover
- disturb the soil
- change the land slopes
- decrease time of concentration of the site through storm drains, open channels, and
paved roads/gutters
soil erosion and sedimentation process (3 steps) CORRECT ANSWERS - soil particles
detach from the soil mass
- water or wind of sufficient energy picks up and transports particles
- soil deposition
keys to sediment/erosion control (2 things) CORRECT ANSWERS - prevent initial
detachment of the soil particles
- reduce runoff velocity
detachment CORRECT ANSWERS most often occurs when the energy of a raindrop
impacting the ground is sufficient to breakdown the soil aggregates and project them
into the air, leading to more particle detachment
detachment occurs when CORRECT ANSWERS KE of the raindrop > total energy
holding the soil in place
transport CORRECT ANSWERS stormwater runoff will then pick up the soil particles
sheetflow CORRECT ANSWERS once the soil becomes saturated and depression
storage fills, puddles begin to overflow
rill flow CORRECT ANSWERS runoff from sheetflow moves downslope, begins to flow
in more defined, small channels. momentum of runoff increases, causing an increase in
erosive potential
gullies CORRECT ANSWERS steep sided channels form due to the erosion. usually not
an issue as much for construction projects as the earthwork operations would prevent
formation
