Home > Flashcards > Print Preview
The flashcards below were created by user
on FreezingBlue Flashcards
. What would you like to do?
List 4 differences between LID and conventional development?
- Narrower streets
- Homes closer to roads
- More open space
- Stormwater control is more decentralized
- Big trees near road
- Winding roads
- Use of rain barrels/cisterns
From a water cycle perspective, what is the goal of LID?
Mimic hydrology of natural, pre-developed area
What does LID stand for?
Low Impact Development
Why are coastal stormwater regulations more stringent than stormwater regulations in other parts of the state?
- Shellfish water pollution
- Proximity to surface waters
What state agency regulates stormwater runoff?
NC Division of Water Quality
What purpose does the mulch in a rain garden serve?
- Looks nice
- Binds pollutants
- Carbon source for denitrification
- Soil structure
How much aerated soil between the bottom of a raingarden and the seasonal high water table is required?
What are the components of a wetpond?
- Aquatic shelf
Why aren’t permeable pavements typically used west of I-95?
Subsoils are slowly permeable
What is rainwater harvesting?
Process of capturing, storing and using rainwater for non-potable activities - if large enough can reduce runoff.
What are some benefits of riparian buffers other than nutrient load reductions?
- Stream shading
- wildlife and aquatic habitat
- sediment reduction
- bank stabilization
What N, P and TSS reduction percentage is achieved by wetponds?
25%, 40%, 85%
What N, P and TSS reduction percentage is achieved by wetlands?
40%, 40%, 85%
What N, P and TSS reduction percentage is achieved by rain gardens?
35%, 45%, 85% (RG no IWS);
What are the components of a stormwater wetland?
- shallow water
- shallow land
- deep pool
What are 5 common stormwater BMPs?
- Rain gardens
- Stormwater wetlands
- Permeable pavement
- Rainwater harvesting
What materials are lagoon liners made of?
List some potential environmental threats related to CAFOs that use anaerobic lagoons
- Over application of waste,
- Leaking lagoons
- Ruptured lagoons
- Fields with tile drains
- Volatilization of NH3
Why do silt loam soils have the highest plant available water?
Pore size distribution- not too small with too much suction, not too large to drain under gravity
Wastewater should be irrigated at rates to maintain soil moisture between ______ and _______.
- feild capacity
- wilting point
List 5 things a CAFO operator must keep in his records
- Waste management plan,
- Certified Operator-in-Charge,
- Sludge survey,
- Calibration of waste equipment,
- Soil sample analysis,
- Crop yield records,
- Stocking and mortality,
- Daily rainfall,
- Waste level,
- Waste Analysis,
- Waste application records,
- Weather conditions,
- Previous inspections
What are the setbacks from a lagoon or swine house to a property boundary?
What are the setbacks from a lagoon or swine house to an occupied church?
What are the setbacks from a lagoon or swine house to an occupied home?
What are the storage requirements for a hog waste lagoon
(what levels are needed beginning with the sludge accumulation to the lagoon berm top?
- Slude accumulation
- permanent liquid treatment
- temporary storage treatment
- 25-yr, 24-hr storage (5-9”)
- heavy rainfall factor
- freeboard (1 ft)
and E. coli?
- 93 mg/L
- 3.3 x 106cfu/100 mL
- 6.9 x 104 cfu/100 mL
What are some typical lagoon wastewater concentrations of BOD?
What are some typical lagoon wastewater concentrations of TKN?
What are the components of a typical hog waste system?
- Spray fields
Where are most hog CAFO’s located in the state?
What are CAFO’s?
Confined animal feeding operations
Why isn’t controlled drainage used more in the piedmont?
What would you like to do?
Home > Flashcards > Print Preview