Stormwater terms

Question 1

raindrop erosion

Answer 1

raindrops that dislodge soil particles

Question 2

Sheet erosion

Answer 2

uniform removal of soil without channel formation

Question 3

Rill erosion

Answer 3

soil removal from concentrated runoff that forms many small channels

Question 4

Gully erosion

Answer 4

highly concentrated erosion that cuts down into soil

Question 5

Stream bank erosion

Answer 5

flowing water that erodes unstable banks

Question 6

Erosion

Answer 6

land surface is removed by water or wind

Question 7

sedimentation

Answer 7

the movement and settling out of suspension of soil particles

Question 8

SWPPP

Answer 8

stormwater pollution prevention plan

1) construction best practices
2) sediment and stormwater plan
3) erosion, sedimentation, and pollution prevention plan
4) construction site BMPs

Question 9

SWPPP components

Answer 9

1) stabilize
2) protect slopes and channels
3) promote infiltration (reduce IA)
4) control perimeter
5) protect receiving waters
6) contain waste
7) minimize exposed soils

Question 10

Revulsion

Answer 10

a strong pulling or drawing back (withdrawl)

Question 11

Accretion

Answer 11

Growing - generally the gradual and imperceptible accumulation of sediment

Question 12

avulsion

Answer 12

when a stream suddenly breaks through a bank and forms a new channel or moves a lot of sediment to deposit it somewhere else - a sudden change of the stream path

Question 13

alluvium

Answer 13

sediments deposited by streams because of a decrease in velocity