CPESC AU
Most plants are useful for erosion control, but some are more desirable than others due to: - Answer-
adaptability to physical and climatic site conditions
For a given amount of water, which has the more kinetic energy - Answer-rainfall at 100mm/hr (more
than water running off in rills)
The definition for hydraulic radius is - Answer-the ratio of a cross-sectional area to the corresponding
wetted perimeter
a factor that can afffect stormwater runoff volume is - Answer-the hydrolic soil group
when specifying a legume in a seed mixture for revegetation one should - Answer-specify the legume
inoculation rate
which one of the following sediment basin shapes has the greatest potential for being most effective in
removing suspended particles for a coarse grained soil: - Answer-a rectangular basin having a
length :width ration = 8:1
, The collar on the underground portion of the discharge pipe in a sediment basin is - Answer-to control
seepage along the pipe
to avoid soil erosion, all sites should be turfed as soon as work is completed T/F - Answer-F
Poly aluminum chloride coagulants are suitable for use in acidic receiving environments T/F - Answer-F
Hay bales are preferred over straw bales because they are more readily available and are more tightly
packed T/F - Answer-F
sediment yield - Answer-doesn't include what has already been deposited
RUSLE calculates what types of erosion - Answer-sheet and rill
gross erosion - Answer-sheet, rill, and other erosion
gr - Answer-gravel
slope = - Answer-rise/run
straw - Answer-better than hay because no seed or nutrients
saltation example - Answer-dust behind truck will fall back down quickly
Wind erosion-stockpiles e=1.7(s/1.5)(365-p)/235(f/15): e= - Answer-total suspended particulates
lb./day/acre
Most plants are useful for erosion control, but some are more desirable than others due to: - Answer-
adaptability to physical and climatic site conditions
For a given amount of water, which has the more kinetic energy - Answer-rainfall at 100mm/hr (more
than water running off in rills)
The definition for hydraulic radius is - Answer-the ratio of a cross-sectional area to the corresponding
wetted perimeter
a factor that can afffect stormwater runoff volume is - Answer-the hydrolic soil group
when specifying a legume in a seed mixture for revegetation one should - Answer-specify the legume
inoculation rate
which one of the following sediment basin shapes has the greatest potential for being most effective in
removing suspended particles for a coarse grained soil: - Answer-a rectangular basin having a
length :width ration = 8:1
, The collar on the underground portion of the discharge pipe in a sediment basin is - Answer-to control
seepage along the pipe
to avoid soil erosion, all sites should be turfed as soon as work is completed T/F - Answer-F
Poly aluminum chloride coagulants are suitable for use in acidic receiving environments T/F - Answer-F
Hay bales are preferred over straw bales because they are more readily available and are more tightly
packed T/F - Answer-F
sediment yield - Answer-doesn't include what has already been deposited
RUSLE calculates what types of erosion - Answer-sheet and rill
gross erosion - Answer-sheet, rill, and other erosion
gr - Answer-gravel
slope = - Answer-rise/run
straw - Answer-better than hay because no seed or nutrients
saltation example - Answer-dust behind truck will fall back down quickly
Wind erosion-stockpiles e=1.7(s/1.5)(365-p)/235(f/15): e= - Answer-total suspended particulates
lb./day/acre
