NPDES Training Exam Study Guide
Questions and Answers
Erosion - Answer-process by which the land surface is worn away by the action of wind, water, and
gravity.
Sedimentation - Answer-settling out of soil particles transported by water and wind.
Wind; Water - Answer-Soil erosion can be classified as either _______ erosion or ______ erosion.
Overland; Stream; Channel - Answer-Water erosion can be classified as either _______ erosion or
________ and _________ erosion.
Splash or raindrop erosion, sheet erosion, rill erosion, and gully erosion - Answer-Four processes of
overland erosion are?
Soil characteristics, vegetative cover, topography, and climate - Answer-Four principle factors
influencing soil erosion are?
, Increased flooding reduced hydraulic capacity in rivers, streams, channels, reservoirs; increased
maintenance of stormwater systems; increased water treatment costs; and decreased recreational
value. - Answer-List three physical effects of erosion and sedimentation:
Reduced light for aquatic plants; clogs fish gills; impairs spawning; disrupts food chain; blankets bottom;
suppresses aquatic life; and disrupts ecosystem - Answer-List three biological effects of erosion and
sedimentation:
Topography; soils; drainage patterns; natural vegetation of the site; and minimize the extent of the area
exposed at one time and the duration of exposure. - Answer-Planning the development to fit the terrain
using the particular:
Perimeter Control - Answer-Apply _________ ________ practices to protect the disturbed area from
off-site runoff and to protect off-site areas from sediment damage.
Erosion Control - Answer-Apply ________ _________ practices to prevent excessive on-site damage.
Low; Retain - Answer-Keep runoff velocities _____ and _____ runoff on the site.
Immediately - Answer-It is very important to Stabilize disturbed areas _________ after final grading to
prevent raindrop impacts from causing erosion.
Maintenance; Follow-up - Answer-Implement a thorough _________ and ________ (inspection)
program as required in the Construction Generic Permit (CGP).
Clay; Muck - Answer-Soil particles smaller than 0.002 mm are classified as _______ and _______ are the
two soil types that cause the most erosion/turbidity problems in Florida and the World.
Questions and Answers
Erosion - Answer-process by which the land surface is worn away by the action of wind, water, and
gravity.
Sedimentation - Answer-settling out of soil particles transported by water and wind.
Wind; Water - Answer-Soil erosion can be classified as either _______ erosion or ______ erosion.
Overland; Stream; Channel - Answer-Water erosion can be classified as either _______ erosion or
________ and _________ erosion.
Splash or raindrop erosion, sheet erosion, rill erosion, and gully erosion - Answer-Four processes of
overland erosion are?
Soil characteristics, vegetative cover, topography, and climate - Answer-Four principle factors
influencing soil erosion are?
, Increased flooding reduced hydraulic capacity in rivers, streams, channels, reservoirs; increased
maintenance of stormwater systems; increased water treatment costs; and decreased recreational
value. - Answer-List three physical effects of erosion and sedimentation:
Reduced light for aquatic plants; clogs fish gills; impairs spawning; disrupts food chain; blankets bottom;
suppresses aquatic life; and disrupts ecosystem - Answer-List three biological effects of erosion and
sedimentation:
Topography; soils; drainage patterns; natural vegetation of the site; and minimize the extent of the area
exposed at one time and the duration of exposure. - Answer-Planning the development to fit the terrain
using the particular:
Perimeter Control - Answer-Apply _________ ________ practices to protect the disturbed area from
off-site runoff and to protect off-site areas from sediment damage.
Erosion Control - Answer-Apply ________ _________ practices to prevent excessive on-site damage.
Low; Retain - Answer-Keep runoff velocities _____ and _____ runoff on the site.
Immediately - Answer-It is very important to Stabilize disturbed areas _________ after final grading to
prevent raindrop impacts from causing erosion.
Maintenance; Follow-up - Answer-Implement a thorough _________ and ________ (inspection)
program as required in the Construction Generic Permit (CGP).
Clay; Muck - Answer-Soil particles smaller than 0.002 mm are classified as _______ and _______ are the
two soil types that cause the most erosion/turbidity problems in Florida and the World.
