CPESC
Erosion - Answer-process in which, by the actions of wind and/or water, soil particles detached and
transported
Sediment - Answer-eroded material suspended in wind or water
Sedimentation - Answer-deposition of eroded material
Types of Erosion - Answer-splash
sheet
rill
gully
channel
Splash erosion - Answer-raindrop impact energy is enough to dislodge surface sediments
sheet erosion - Answer-caused by rain splash detaching soil particles lifting them up and removing them
by shallow "sheets" of water flowing down the sloped soil surface
,Rill Erosion - Answer-as flow concentrates, small channels begin to form in the soil surface
Gully Erosion - Answer-Formed when runoff cuts rills deeper and wider or when flows from several rills
come together and form a large channels
Channel Erosion - Answer-may become unstable due to increased flows or changes in upstream
sediment load
Natural erosion - Answer-generally considered due to the influences of climate on the surface of the
earth
Accelerated erosion - Answer-natural erosion plus human activities
What problems can accelerated erosion cause? - Answer-Unrestricted development
removal of surface cover
increased imperviousness
poor stewardship
Problems associated with construction related erosion - Answer-problems for down slope property
owners
nuisance problems on streets
clog streams and storm drains
increased turbidity downstream
cover sensitive habitat with sediment
Identify instream damages of sediment - Answer-destruction of spawning areas, food sources, habitat
direct toxicity to wildlife
,lake degradation
filling of navigation channels
impacts to commercial fisheries
reduction of water storage capacities
Suspended material - Answer-sediment can affect light penetration, channel stability, fisheries and
habitat
Name Off stream damages - Answer-Increased flood hazards
increased water treatment costs
decreased capacity in conveyance facilities
higher infrastructure maintenance costs
What has increased the amount of impervious surface in our watersheds? - Answer-Urbanization and
development
priority pollutants include - Answer-nutrients
pathogens
heavy metals
toxics
sediment
salts
detergents
hydro carbons
Clean Water Act (CWA) - Answer-Federal Water Pollution Control Act enacted to restore and maintain
the chemical, physical and biological integrity of the waters of the US
, administered by USEPA
Section 401 - Answer-water quality certification
requires applicant, including any construction or operation of a facility, to obtain certification to
discharge ANY pollutant.
administered by the State
Section 402 - Answer-NPDES Regs
NPDES - Answer-National Pollutant Discharge Elimination System
MS4 - Answer-Municipal Separate Storm Sewers Systems
NURP - Answer-Nationwide Urban Runoff Program
1987-1983
led to EPA regulating stormwater
Phase I
(1987 - 1992) - Answer-already covered by NPDES permit
facilities that engage in industrial activity
Large municipal storm systems (>250,000)
Medium municipal storms systems (100 - 250 K)
facilities that EPA said were significant contributors
Erosion - Answer-process in which, by the actions of wind and/or water, soil particles detached and
transported
Sediment - Answer-eroded material suspended in wind or water
Sedimentation - Answer-deposition of eroded material
Types of Erosion - Answer-splash
sheet
rill
gully
channel
Splash erosion - Answer-raindrop impact energy is enough to dislodge surface sediments
sheet erosion - Answer-caused by rain splash detaching soil particles lifting them up and removing them
by shallow "sheets" of water flowing down the sloped soil surface
,Rill Erosion - Answer-as flow concentrates, small channels begin to form in the soil surface
Gully Erosion - Answer-Formed when runoff cuts rills deeper and wider or when flows from several rills
come together and form a large channels
Channel Erosion - Answer-may become unstable due to increased flows or changes in upstream
sediment load
Natural erosion - Answer-generally considered due to the influences of climate on the surface of the
earth
Accelerated erosion - Answer-natural erosion plus human activities
What problems can accelerated erosion cause? - Answer-Unrestricted development
removal of surface cover
increased imperviousness
poor stewardship
Problems associated with construction related erosion - Answer-problems for down slope property
owners
nuisance problems on streets
clog streams and storm drains
increased turbidity downstream
cover sensitive habitat with sediment
Identify instream damages of sediment - Answer-destruction of spawning areas, food sources, habitat
direct toxicity to wildlife
,lake degradation
filling of navigation channels
impacts to commercial fisheries
reduction of water storage capacities
Suspended material - Answer-sediment can affect light penetration, channel stability, fisheries and
habitat
Name Off stream damages - Answer-Increased flood hazards
increased water treatment costs
decreased capacity in conveyance facilities
higher infrastructure maintenance costs
What has increased the amount of impervious surface in our watersheds? - Answer-Urbanization and
development
priority pollutants include - Answer-nutrients
pathogens
heavy metals
toxics
sediment
salts
detergents
hydro carbons
Clean Water Act (CWA) - Answer-Federal Water Pollution Control Act enacted to restore and maintain
the chemical, physical and biological integrity of the waters of the US
, administered by USEPA
Section 401 - Answer-water quality certification
requires applicant, including any construction or operation of a facility, to obtain certification to
discharge ANY pollutant.
administered by the State
Section 402 - Answer-NPDES Regs
NPDES - Answer-National Pollutant Discharge Elimination System
MS4 - Answer-Municipal Separate Storm Sewers Systems
NURP - Answer-Nationwide Urban Runoff Program
1987-1983
led to EPA regulating stormwater
Phase I
(1987 - 1992) - Answer-already covered by NPDES permit
facilities that engage in industrial activity
Large municipal storm systems (>250,000)
Medium municipal storms systems (100 - 250 K)
facilities that EPA said were significant contributors
