Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Dispersion Modeling"”.
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Verification Of FAA's Emissions And Dispersion Modeling System (EDMS)
… point, line and area sources, making emissions modeling for airports very complex and more involved. Accurate air quality models, specific to airport needs, are required to properly analyze this complex array of air pollution sources created by airports. Accurate air quality models are needed to …
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Hydrogen Sulfide Flux Measurements And Dispersion Modeling From Constr
… In addition to the h2s flux measurements, dispersion modeling was conducted, using the epa dispersion model, industrial source complex short term (iscst3), in order to evaluate impacts on landfill workers and communities around the landfills. The modeling results were analyzed to estimate …
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Monitoring and Inverse Dispersion Modeling to Quantify VOCs from MSW Landfill
… This research is based on the monitoring and modeling methodology proposed by researchers at University of Central Florida is reported in this thesis. River Birch Sub-title D landfill, Westwego, LA was selected as the study area. The total emission calculated using the mathematical model ran …
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Plume Dispersion Modeling of Chlorine Gas Released Due to Ballistic Attack on Chlorine-Carrying Railway Tanker
Hazardous dense gases such as chlorine are often transported throughout the United States in their liquid form in pressurized railway tankers. These tankers can hold up to 90 tons of liquid chlorine. A high-powered, ballistic attack on a chlorine-carrying tanker could cause devastating outcomes for …
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Aircraft Greenhouse Gas Emissions during the Landing and Takeoff Cycle at Bay Area Airports
… data was used along with the Emissions and Dispersion Modeling System (EDMS) to produce GHG emissions inventory for the LTO cycle at SFO, OAK, and SJC. These emissions inventories were compared to comparable sized airports both domestically and internationally.</p> <p>Results indicate that …
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Modeling Outdoor Air Pollution and the Urban Form
… and temporal resolution for aerial pollutant dispersion modeling within dense urban environments such as urban canyons. An open-source platform such as OpenFOAM is valuable as it can be fully customized for the varying intricacies of urban airflow and is accessible to a wide audience. This …
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Economics of air pollution: policy, mortality concentration-response, and increasing marginal benefits of abatement
… The third essay integrates a new model of air dispersion with an economic model to estimate the marginal damage caused by criteria pollutants in the United States. In the first essay, the optimal abatement policy is derived for a scenario with increasing marginal benefits of abatement and …
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Essays on health economics and the early-life determinants of adult outcomes
… (1930-1969) California wildfires and smoke dispersion modeling. We then combine these wildfire pollution data with comprehensive, restricted-use administrative data. These linked data allow us to measure childhood wildfire smoke exposure for four decades of birth cohorts and to observe a …
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Community-based evaluation of the air toxic provisions of title III of the 1990 clean air act amendments : risks, costs and benefits
… the year the Clean Air Act was last amended. Air dispersion modeling, based on the physical characteristics and mass emission rates of the source facilities, was used to quantitatively and spatially estimate the community's exposure to RAPs. The estimated exposures were then used to evaluate the …
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The fate and transport of light petroleum hydrocarbons in the Lower Mississippi River Delta
… wedge increased the river’s salinity. Typical dispersion modeling does not account for OMA providing inaccurate mass balances since as much as 36% of an oil spill has the potential to reach the Gulf of Mexico as OMA, depending on environmental conditions and spill characteristics. The …
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Development of techniques for rapidly assessing the local air quality impacts of airports
… through the production of PM2.5. Currently, dispersion models can assess these local-scale (distances ~10 km) impacts, calculating long-term (annual) average concentrations of PM2.5. However, these models typically require hours to complete an analysis for one site, hindering their use for …
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Development Of A Graphical User Interface For Cal3qhc Called Calqcad
… for NAAQS standards, it is necessary to conduct dispersion modeling of emissions for mobile source emissions. Design of transportation engineering systems (roadway design) should take care of both the flow of the traffic as well as the air pollution aspects involved. Roadway projects need to …
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Particulate matter emissions from commercial beef cattle feedlots in Kansas
… cattle feedlot (KS3) in Kansas by using inverse dispersion modeling with the AMS/EPA Regulatory Model (AERMOD), which is the US EPA preferred regulatory atmospheric dispersion model. PM[subscript]10 emission rates were back-calculated using the resulting PM[subscript]10 concentrations modeled by …
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Modeling Traffic Dispersion
The dissertation studies traffic dispersion modeling in four parts. In the first part, the dissertation focuses on the Robertson platoon dispersion model which is the most widely used platoon dispersion model. The dissertation demonstrates the importance of the Yu and Van Aerde calibration …
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Application of GIS in Visualization and Assessment of Ambient Air Quality for SO2 in Lima Ohio
The deterioration of urban air quality due to industrialization or other anthropogenic reasons is of great concern because it poses serious threats to environment and human health. EPA regulates and monitors air quality to protect public health and welfare at stations located throughout USA. …
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Modeling risks associated with water reuse in agriculture
According to the World Resources Institute, as of 2019, there are 68 countries experiencing at least medium-high water stress, with 17 experiencing extremely high water stress (Hofste, Reig & Schleifer, 2019). This is dire news, and any solution must balance the rate of human water consumption with …