Module 13 - Stormwater

Question 1

The origin of PAH can be found out by calculating the ratios of individual PAH.
TRUE
FALSE

Answer 1

TRUE

Question 2

Which are functions of LID? (Check ALL that apply)
Pollution prevention
Education
Infiltration
Detention

Answer 2

Pollution prevention
Education
Infiltration
Detention

Question 3

The purpose of providing erosion and sediment control is to:
Give environmental activists something to do.
Cause undue hardship and expense on the developer and contractor.
Provide jobs for government employees.
Provide a means of construction without harming the environment through sediment pollution.

Answer 3

Provide a means of construction without harming the environment through sediment pollution.

Question 4

A forebay is used in bioretention systems … (check ALL that apply).
To dose the stormwater.
To reduce sediment inputs on the bioretention cell.
To slow down stormwater so particles can settle out.
To reduce clogging of the bioretention media.

Answer 4

To reduce sediment inputs on the bioretention cell.
To slow down stormwater so particles can settle out.
To reduce clogging of the bioretention media.

Question 5

Why is stormwater runoff from impervious surfaces a problem for receiving water bodies?
It improves water quality and stream hydrology
It reduces water quality
It affects stream hydrology
It reduces water quality and affects stream hydrology

Answer 5

It reduces water quality and affects stream hydrology

Question 6

New constructions in Alabama are required to implement GSI practices according to the Alabama LID handbook.
TRUE
FALSE

Answer 6

FALSE

Question 7

Which effects does sediment have on streams or lakes?
Smothers fish/insect habitat
All of the answers
Clogs fish gills
Carries phosphorus (P) and mercury (Hg ), and other contaminants

Answer 7

All of the answers

Question 8

A single quart of motor oil dumped down a storm sewer creates an oil slick of what size?
1 acre
2 acres
100 sq feed
10 acres

Answer 8

2 acres

Question 9

Nonpoint Source pollutants include:
Sediment, nutrients, and groundwater
All of the other answers
Pathogens, sediment, and temperature
Impervious surfaces, litter, and pathogens

Answer 9

Pathogens, sediment, and temperature

Question 10

Toxicological studies oftentimes result in an LD rating of a chemical. What might be problematic about this approach? (check ALL that apply)
Long-term effects are not tested.
Usually, only one substance/pollutant is tested.
Physiological differences between the test and target organism may occur.
Only sublethal effects are being evaluated.

Answer 10

Long-term effects are not tested.
Usually, only one substance/pollutant is tested.
Physiological differences between the test and target organism may occur.

Question 11

Sublethal effects …
Lead to immediate mortality of an organism.
Are not relevant in eco-toxiclogy since they are not lethal.
Have only been found in vertebrates.
Do not lead to immediate mortality of an organism, but results in lasting damage.

Answer 11

Do not lead to immediate mortality of an organism, but results in lasting damage.

Question 12

Rain gardens and bioretention cells are designed to capture …
All runoff from an impermeable surface.
The first 1” of rainfall.
A 100-year 24h storm.
The first 0.5” of rainfall.

Answer 12

The first 1” of rainfall.

Question 13

Which of the following water contaminants are NOT usually found in stormwater?
Contaminants from roads such as oil and heavy metals.
Pet waste.
Shampoo and personal care products.
Lawn or agricultural products such as fertilizers and pesticides.

Answer 13

Shampoo and personal care products.

Question 14

Some Bioretention systems are designed with an underdrain. Check ALL correct statements.
Underdrains are installed when the native soil does not allow stormwater infiltration within 48-72h.
Underdrains are designed with an upturned elbow for internal water storage to promote denitrification.
Underdrains affect the residence time of stormwater in a bioretention system.
Underdrains improve infiltration into the soil.

Answer 14

Underdrains are installed when the native soil does not allow stormwater infiltration within 48-72h.
Underdrains are designed with an upturned elbow for internal water storage to promote denitrification.
Underdrains affect the residence time of stormwater in a bioretention system.

Question 15

Organic matter is added to bioretention mixes (check ALL that apply)
Improve iron coating on the grains.
Increase retention of positively charged pollutants, such as heavy metals.
Promote plant growth.
Promote microbial communities.

Answer 15

Increase retention of positively charged pollutants, such as heavy metals.
Promote plant growth.
Promote microbial communities.

Question 16

In an urbanized area, what percentage of the rainfall results in runoff?
80%
30%
10%
50%

Answer 16

50%

Question 17

Urban trees play an important role in urban stormwater management. Check ALL correct statements.
Trees facilitate stormwater infiltration through their root network.
Trees transpire stormwater resulting in a cooling effect of the urban landscape.
Trees increase the urban heat island effect.
Trees intercept rainfall on their canopy.

Answer 17

Trees intercept rainfall on their canopy.

Question 18

What type of driveway increases stormwater runoff?
Asphalt or concrete
Porous pavement
Soil
Gravel

Answer 18

Asphalt or concrete

Question 19

The Alabama Bioretention media mix consists of:
85% sand, 5% fines, 10% organic matter
60% sand, 40% compost
85% sand, 10% fines, 5% organic matter
80% sand, 15% fines, 5% organic matter

Answer 19

85% sand, 10% fines, 5% organic matter

Question 20

What is a watershed?
All the land right next to a stream or lake
None of them
Lowland areas surrounding a lake or stream
All the land areas that drain to a stream or lake

Answer 20

All the land areas that drain to a stream or lake

Question 21

Recent research shows that water quality declines sharply when impervious cover (roads, driveways, roofs, etc.) in a watershed exceeds:
25%
10%
15%
40%

Answer 21

10%

Question 22

Stormwater runoff affect the hydrology of the receiving water body. (Check ALL that apply)
More stormwater infiltrates.
Higher base flow rates result form stormwater runoff.
Peak flow arrives earlier in the stream.
More runoff reaches the receiving water body creating higher flow rates.

Answer 22

Peak flow arrives earlier in the stream.
More runoff reaches the receiving water body creating higher flow rates.

Question 23

NPDES is an abbreviation of:
National Policy for Discharge of Erosion and Sediment
National Pollutant Discharge Elimination System
Natural Protection of Developed Erosion Sites
National Pollutant Development and Elimination System

Answer 23

National Pollutant Discharge Elimination System

Question 24

GSI stands for …
Graduate Stormwater Infrastructure
Genious Stormwater Infiltration
Gray Stormwater Infrastructure
Green Stormwater Infrastructure

Answer 24

Green Stormwater Infrastructure

Question 25

Where is the best place to wash your car?
On your lawn
At a commercial carwash
On your driveway

Answer 25

At a commercial carwash

Question 26

In a forested environment, what percentage of the rainfall results in runoff?
90%
30%
80%
10%

Answer 26

10%

Question 27

LID stands for …
Low Immision Development
Low Impact Development
Lasting Improved Development
Least Impact Development

Answer 27

Low Impact Development

Question 28

Polycyclic aromatic hydrocarbons (PAH) come from sources such as (check ALL that apply).
Combustion motors-based traffic.
Cooking oils.
Coal-fired power plants.
Lawn fertilizers.

Answer 28

Combustion motors-based traffic.
Cooking oils.
Coal-fired power plants.

Question 29

Nutrients in stormwater typically come from:
Low density residential areas.
Commerical areas.
Industrial areas.
High density residential areas.

Answer 29

Low density residential areas.

Question 30

In an urbanized area, what percentage of the rainfall results in infiltration?
70%
15%
60%
80%

Answer 30

15%