PRELIM ENVI ENG Flashcards
this term emerged in the 1960s as academic programs in engineering and public health schools expanded, necessitating a more precise title for their curricula and graduates
environmental engineer
combines various disciplines, bringing knowledge, skills, and professionalism
environmental engineering
who discovered civil engineering and when was it discovered?
John Smeaton, 1782
origins trace back to civil engineering, public health, ecology, chemistry, and meteorology
environmental engineering
focuses on the greater good
ethics
recognized that his profession tended to focus on the construction of public facilities rather than purely military ones
John Smeaton
builder of roads, structures, and canals in England
John Smeaton
This title was widely adopted by engineers engaged in public works
Civil Engineer
Where and when was the first engineering course outside USMA offered?
American Literary, Scientific, and Military Academy in 1821
first formal university engineering curriculum in the United States
U.S. Military Academy at West Point in 1802
What is now the name of the American Literary, Scientific, and Military Academy?
Norwich University
conferred the first truly civil engineering degree in 1835
Rensselaer Polytechnic Institute
it was founded in 1852
American Society of Civil Engineers
When was the American Society of Civil Engineers found?
1852
When was the American Society of Civil Engineers found?
1852
When did Rensselaer Polytechnic Institute conferred the first truly civil engineering degree?
1835
When was the report from the Poor Law Commissioners on an Inquiry into the Sanitary Conditions of the Labouring Population of Great Britain?
1842
the identification of filth as both a cause of disease and a vehicle of transmission and the ensuing embrace of cleanliness
Great Sanitary Awakening
When was the Great Sanitary Awakening?
1850s
Who led the Great Sanitary Awakening?
Sir Edwin Chadwick, England
Ludwig Semmelweiss, Austria
defines ecosystems as interdependent populations of organisms interacting with their physical and chemical environment
Ecology
defined as interdependent populations of organisms interacting with their physical and chemical environment
ecosystems
The populations of the species in an ecosystem do not vary independently but rather fluctuate in an approximate steady state in response to self-regulating or negative feedback
Homeostasis
populations are also governed by positive feedback mechanisms that result from changes in the physical, chemical, and biological environment
Homeorhesis
can be illustrated by a simple interaction between two populations
Homeostatic mechanisms
as a framework for making decisions appeared to be irrelevant to engineering since the engineer generally did precisely what the employer or client required
Ethics
committed to high standards of interpersonal and environmental ethics
environmental engineers
The aviation industry contributes to greenhouse emission from ground airport vehicles used by the passengers and staff to access the airports, as well as through emissions by the production of energy used in airport terminals, the manufacture of aircraft and the construction of airport infrastructure.
Climate Change
most important emitting gas from aircraft due to combustion of fossil fuel which contributes to greenhouse effect
Carbon Dioxide
most significant and studied element accelerating climate change
Carbon Dioxide
emission is much more dominant and hence increased concentration of O3 enhances the effect of global warming
Nitrogen Oxides
one of the products obtained after combustion of hydrocarbons with oxygen; a greenhouse gas
water vapor
Water vapor produced by aircraft engines at high altitude, under certain atmospheric conditions, condenses into droplets to form _________
condensation trails or contrails
The soot particles emitted from aircraft engines are considered to be most influential for contrail formation
particulates
a harmful noise effect produced by various components of an aircraft during its different segment of flight schedule
aircraft noise
Three Categories of Aircraft Noise
Mechanical Noise, Aerodynamic Noise, System Noise
comes from rotation of engine parts; it becomes most significant when fan blades attain a supersonic tip velocity
mechanical noise
Q
This type of noise is again important at low altitudes where air density is higher
aerodynamic noise
supersonic tip velocity
buzz saw noise
affected by the shape of nose and canopy of the aircraft
aerodynamic noise
Two Categories of Aerodynamic Noise
bluff body noise, edge noise
Alternating vortex shedding from either side of a bluff body creates a low pressure region at the core of the shed vortices, which results in generating pressure waves
bluff body noise
When turbulent flow passes through the trailing edge of an aircraft wing or through the clearance area of the high lift devices (HLD) attached to the wing, then fluctuations in pressure propagate as sound waves (Tollemin-Schlichting wave) radially downwards
edge noise
What is the sound wave in edge noise called?
Tollemin-Schlichting wave
possible solutions to reduce the environmental impact of aircraft noise
technological advancements (engine design and location), regulations
generated from various systems of aircraft as cockpit, cabin pressurization, conditioning systems and Auxiliary Power Units (APU)
system noise
possible solutions to reduce the environmental impact of climate change
aircraft efficiency, operating efficiency, alternative fuels, electric propulsion, regulations
What does NEPA stand for?
National Environmental Policy Act
Who signed NEPA into law?
President Richard Nixon
requires that environmental impact be assessed whenever a federal action will have an environmental impact, as well as requiring that alternatives be considered
National Environmental Policy Act (NEPA)
When was NEPA signed into law?
January 1,1970
Q
On January 1,1970, President Richard Nixon signed NEPA into law, setting a national policy to encourage ___________ between people and their environment.
productive and enjoyable harmony
What does FONSI stand for?
Finding of No Significant Impact
Such a stand-alone finding results when potential environmental impacts are compared to a checklist of significant impacts, with the result that no significant impact can be identified.
Finding of No Significant Impact (FONSI)
detailed assessment of potential environmental impact resulting in one of two conclusions: either the EA must be expanded to a full-scale environmental impact statement or a FONSI results from the EA.
Environmental Assessment (EA)
What does EA stand for?
Environmental Assessment
must assess in detail the potential environmental impacts of a proposed action and alternative actions
Environmental Impact Statement (EIS)
What does DEIS stand for?
Draft Environmental Impact Statement
issued by the appropriate federal agency
Draft Environmental Impact Statement (DEIS)
What does FEIS stand for?
Final Environmental Impact Statement
After mandated public hearings and incorporation of comments, the federal agency issues a ________
Final Environmental Impact Statement (FEIS)
includes the final decision about the project, the alternative chosen, and any value judgments
Record of Decision (ROD)
What does ROD stand for?
Record of Decision
interpretation of these findings, which is often done concurrently with estimating impacts
evaluation
Four Distinct Phases of Writing an Environmental Asssessment
Scoping, Inventory, Assessment, Evaluation
scope or extent of the assessment
scoping
cataloging of environmentally susceptible areas and activities, including socioeconomically impacted areas
inventory
process of estimating the impact of the alternatives, including cumulative impacts, and the impacts of a “no action” alternative
assessment
What does GEIS stand for?
Generic Environmental Impact Statement
What does PEIS stand for?
Programmatic Environmental Impact Statement
refers to the impact assessment for an extended or multifaceted project
Generic Environmental Impact Statement (GEIS)
refers to an assessment for an entire program
Programmatic Environmental Impact Statement (PEIS)
refers to the process of calculating projected effects that a proposed action or construction project will have on environmental quality
Environmental Assessment
Semi-Quantitative Approaches of Environmental Assessment
Checklist, Interaction Matrix, Checklist with weighted rankings
these are lists of potential environmental impacts, both primary and secondary
checklists
occurs as a direct result of the proposed project, such as the effect of dam on aquatic life
primary effects
It will list direct impacts owning to noise, water pollution resulting from runoff, energy use, etc., and indirect impacts owing to regional development, housing, lifestyle, and economic development.
operation phase
occurs as an indirect result of the action, such that an interchange for a highway may not directly affect wildlife, but indirectly it will draw such establishments as service stations and quick food stores, thus changing land use patterns
secondary effects
This will include displacement of people, noise, soil erosion, air and water pollution, and energy use
construction phase
Consideration is given to the environmental effects of the highway route and the acquisition and condemnation of property
planning phase