Existing vegetation
-designed to stabilize soil and to remove suspended particles from sheet flow runoff
Limitations= some regions may not have vegetation to work with
Scheduling
-involves creating a written plan to address necessary BMPs and sequencing of construction events
-must take ...
Existing vegetation - ANSWER- -designed to stabilize soil and to remove
suspended particles from sheet flow runoff
Limitations= some regions may not have vegetation to work with
Scheduling - ANSWER- -involves creating a written plan to address necessary
BMPs and sequencing of construction events
-must take into account local considerations such as rainfall, wind, soil types
-overall purpose is to minimize the amount and duration of exposed soil
Tree protection - ANSWER- -protecting trees so they don't have to be removed
-delineate tree area with fencing or similar devices
Hydromulch - ANSWER- -consists of wood or other fiber in a hydraulic matrix
with a stabilizing emulsion or tackifying agent
Limitations= requires curing time, not meant for high-traffic areas
Hydroseed - ANSWER- -consists of seed, fertilizer, and stabilizing emulsion
applied with hydraulic equipment to protect soils from wind and water
Limitations= may be difficult on steeper slopes
Mulching - ANSWER- designed to reduce erosion and runoff by applying straw,
wood, bark, or other mulching material to exposed soil
Limitations= not suitable for steep slopes, undesirable species may be
introduced to your site
Rolled Erosion Control Products (RECP) - ANSWER- -erosion control blankets
(temp.) or turf reinforcement mats (permanent) that act as soil stabilization
devices. Constructed of natural materials-straw, wood excelsior, or coconut husk.
Seeding - ANSWER- -brings about the establishment of temporary or permanent
vegetative cover
, Sod - ANSWER- -operates, by laying either in squares or rolls, a thick, lush
vegetative cover on top of soil
Limitations= time from harvest to installation should not exceed two to three
days; DO NOT mow until the sod has had a chance to establish a local root
system
Soil Binders - ANSWER- -applied to disturbed soils to reduce erosion (ex.
polyacrylamides (PAM))
Surface Roughening - ANSWER- -uses mechanized equipment to apply a rough
texture to graded soils. This forces water to encounter multiple small "sediment
traps"
-horizontal depressions applied on the contour
Tackifiers - ANSWER- -adhesives that are used to secure mulch materials to a
surface and to other mulch materials or to cause soil particles to stick to one
another
Temporary Stabilization - ANSWER- -designed to reduce erosion by stabilizing
areas that willl lay bare for extended periods (ex. stone and plastic)
Baffles - ANSWER- -designed to lengthen the flow path of basins/traps/ponds as
well as slowing, calming, and distributing the flow in these devices, thus allowing
pollutants more time to fall out of suspension
Cut-back Curb - ANSWER- -create a place for water to pond at the back of curb
while still allowing full access to the site
Fiber rolls/ Waffles - ANSWER- -straw, mulch, etc. packed and placed into rolls
that is designed to capture sediment and reduce flow velocity
-targets sediment and hydrocarbons
Sediment Bags - ANSWER- Utilize large, porous sediment collection bags to
manage pollutant discharge when accumulated water must be removed from job
site
Limitations= does not capture all sediment
Sediment Basin - ANSWER- -allows stormwater runoff to be collected and allows
the sediment present in the runoff to fall out of suspension before the water is
allowed to undergo controlled release
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