Module 13 - Stormwater Flashcards
The origin of PAH can be found out by calculating the ratios of individual PAH.
TRUE
FALSE
TRUE
Which are functions of LID? (Check ALL that apply)
Pollution prevention
Education
Infiltration
Detention
Pollution prevention
Education
Infiltration
Detention
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.
Provide a means of construction without harming the environment through sediment pollution.
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.
To reduce sediment inputs on the bioretention cell.
To slow down stormwater so particles can settle out.
To reduce clogging of the bioretention media.
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
It reduces water quality and affects stream hydrology
New constructions in Alabama are required to implement GSI practices according to the Alabama LID handbook.
TRUE
FALSE
FALSE
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
All of the answers
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
2 acres
Nonpoint Source pollutants include:
Sediment, nutrients, and groundwater
All of the other answers
Pathogens, sediment, and temperature
Impervious surfaces, litter, and pathogens
Pathogens, sediment, and temperature
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.
Long-term effects are not tested.
Usually, only one substance/pollutant is tested.
Physiological differences between the test and target organism may occur.
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.
Do not lead to immediate mortality of an organism, but results in lasting damage.
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.
The first 1” of rainfall.
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.
Shampoo and personal care products.
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.
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.
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.
Increase retention of positively charged pollutants, such as heavy metals.
Promote plant growth.
Promote microbial communities.
In an urbanized area, what percentage of the rainfall results in runoff?
80%
30%
10%
50%
50%
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.
Trees intercept rainfall on their canopy.
What type of driveway increases stormwater runoff?
Asphalt or concrete
Porous pavement
Soil
Gravel
Asphalt or concrete
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
85% sand, 10% fines, 5% organic matter
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
All the land areas that drain to a stream or lake
Recent research shows that water quality declines sharply when impervious cover (roads, driveways, roofs, etc.) in a watershed exceeds:
25%
10%
15%
40%
10%
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.
Peak flow arrives earlier in the stream.
More runoff reaches the receiving water body creating higher flow rates.
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
National Pollutant Discharge Elimination System
GSI stands for …
Graduate Stormwater Infrastructure
Genious Stormwater Infiltration
Gray Stormwater Infrastructure
Green Stormwater Infrastructure
Green Stormwater Infrastructure
Where is the best place to wash your car?
On your lawn
At a commercial carwash
On your driveway
At a commercial carwash
In a forested environment, what percentage of the rainfall results in runoff?
90%
30%
80%
10%
10%
LID stands for …
Low Immision Development
Low Impact Development
Lasting Improved Development
Least Impact Development
Low Impact Development
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.
Combustion motors-based traffic.
Cooking oils.
Coal-fired power plants.
Nutrients in stormwater typically come from:
Low density residential areas.
Commerical areas.
Industrial areas.
High density residential areas.
Low density residential areas.
In an urbanized area, what percentage of the rainfall results in infiltration?
70%
15%
60%
80%
15%
