environmental science Flashcards
four indicators within
environmental science that are related to civil engineering such that sustainable development are
achieved
- Low-impact development
- Drinking water treatment
- Wastewater treatment
- Outdoor air quality
one of the primary considerations of
LID in civil engineering
runoff
maximum amount of water
peak runoff
Various methods to mitigate peak runoffs
Green Roofs
Porous Pavements
Bioretention Cells
consist of
multiple layers of natural
vegetation, synthetic material, and
impermeable material
Green Roofs
Another sustainable application to reduce peak runoff is the use of _______, also called
_________.
porous, permeable
Porous pavements typically come in three forms:
porous asphalt, porous concrete, or
pavers
utilize gap-graded aggregate gradations with air
voids typically between 15% and 25%.
porous asphalt and porous concrete
areas of plants and other porous
materials placed near impervious surfaces that allow for the collection, filtration, infiltration, and
recharge of water that runs off an impervious surface
Bioretention Cells
five stages to wastewater treatment:
pretreatment, primary treatment,
secondary treatment, tertiary treatment, and disinfection (which is sometimes considered a
tertiary treatment)
The _________ generally removes floating debris (through screening) and
grit (gravity), which are larger particulate material that could abrade piping and mechanical
equipment in the treatment process.
pretreatment
____________ removes solids through gravity settling
in a sedimentation tank.
Primary treatment
________ generally removes nutrients (such as nitrogen and
phosphorus)
Secondary treatment
_____________ polishes the treated wastewater, such as removing the
remaining fine particles through filtration.
Tertiary treatment
OTHER EFFORTS IN CIVIL ENGINEERING RELATIVE TO ENVIRONMENTAL SCIENCE
Recycled Glass in Pavement Base
Reclaimed Asphalt Pavement in Pavement Subbase
Recycled Glass in Footpaths
