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 20 of 36 for “"Pollutant Transport"”.
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One dimensional pollutant transport model
… of a numerical model for one-dimensional pollutant transport in a porous medium. A computer program POLUTE1D has been developed. The numerical model is based on the flow and mass transport equations and the finite element method has been used for its formulation. The problem involves …
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Modeling Stormwater Pollutant Transport in a Karst Region--Bowling Green, Kentucky
… conduits in the subsurface and the buildup of pollutants underneath can be detrimental to community and environmental health if not effectively mitigated. Because of the limited resources available to determine how stormwater runoff carries potential pollutants across the surface before being …
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Virtual Worlds and Conservational Channel Evolution and Pollutant Transport Systems (Concepts)
Many models exist that predict channel morphology. Channel morphology is defined as the change in geometric parameters of a river. Channel morphology is affected by many factors. Some of these factors are caused either by man or by nature. To combat the adverse effects that man and nature may cause …
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Quantifying Air Distribution, Ventilation Effectiveness and Airborne Pollutant Transport in an Aircraft Cabin Mockup
… ventilation effectiveness and airborne pollutant transport. The experimental facility is a full-scale aircraft cabin mockup. A volumetric particle tracking velocimetry (VPTV) technique was enhanced by incorporating a self-developed streak recognition algorithm. Two stable recirculation …
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SIMULATION OF POLLUTANT TRANSPORT RESPONSES TO LOADING AND WEATHER VARIATIONS IN LAKE ST. CLAIR AND THE CONNECTING CHANNELS.
… framework which can be used to simulate the transport of toxic and conventional substances in surface waters for the Huron-Erie corridor of the Great Lakes. In simulating the transport of conventional pollutants in the rivers, a simple hydrodynamic submodel, which includes flow around …
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Projections of Future Changes in Surface Ozone Concentrations Over the United States, Effects of Pollutant Transport, and Uncertainty Analyses
… are based on results from the global chemical-transport model, Model for OZone And Related chemical Tracers version 2.4, driven by meteorological fields from a state-of-the-art climate model, namely the Parallel Climate Model. It is found that potential changes in U.S. ozone concentrations …
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Buildup/Washoff Model for Dissolved Iron in Stormwater Runoff
… curve assumption was selected to estimate the pollutant transport capacity. In a further step the two were combined. The derived Buildup/Washoff model was calibrated for the collected data and precipitation data of the International Airport of New Orleans. The obtained power function for …
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Quantifying non-Fickian transport in porous and fractured media using fractional-calculus based stochastic models
Non-Fickian or “anomalous” transport, where the target’s spatial variance grows nonlinearly in time, describes the pollutant dynamics widely observed in heterogeneous geological media deviating significantly from that described by the classical advection dispersion equation (ADE). The ADE describes …
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Poluição de águas subterrâneas: seleção de um modelo matemático de dispersão bidimensional
… equations, one for the mixture water and pollutant (flow equation) and other only for the pollutant (mass-transport equation), Darcy's equation and state equations for the mixture. Complex boundary conditions in practical cases may lead to the use of numerical methods to solve this set of …
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Roles of Nano- and Micro-Scale Subsurface Geochemical Reactions on Environmentally Sustainable Geologic CO2 Sequestration
… can affect the porosity, permeability, and pollutant transport in aquifers. Despite their importance, nano- and micro-scale subsurface geochemical reactions are far from well-understood.</p><p>Clay mobilization has been reported to decrease aquifer permeability during water flooding, and …
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An investigation into air quality with an emphasis on the design and development of a numerical model for the transport of gaseous and particulate pollutants in airborne and deposited matter
… and development of a numerical model for the transport of gaseous and particulate pollutants in airborne and deposited matter. The reported programme of research was undertaken with the dual aim of; establishing a programme of monitoring in order that ambient concentrations of selected air …
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Impacts of biota on bioretention cell function during establishment in the Midwest
… treatments did not induce a higher rate of pollutant transport.
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Modeling Outdoor Air Pollution and the Urban Form
… Models are thus useful to understand how pollutants interact with the built and natural environment. Computational fluid dynamics (CFD) offers the highest spatial and temporal resolution for aerial pollutant dispersion modeling within dense urban environments such as urban canyons. An …
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Modernized Approach For Generating Micro-Layering And Macro-Heterogeneous Structures In Porous Media For Use In Transmitted-Light Method Flow Visualization Experiments
… zone is responsible for all recharge waters, pollutant transport and even irrigation efficiency for agriculture. Griffith, et al. (2011) developed an approach where constructed reproducible “geologically realistic” sand configurations are deposited in sand-filled experimental chambers or cells …
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Barrier island groundwater dynamics
… availability of freshwater, ecosystem health, pollutant transport, and flooding in these densely populated communities. However, groundwater dynamics, including the aquifer head distribution and subsurface salinity structure, in coastal aquifers are affected by multiple environmental forcings, …
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Rain Induced Runoff Simulation Using A 2D Numerical Model
… capability can be used for soil erosion and agro-pollutant transport and flood impact studies.
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Barrier Island Groundwater Dynamics
… availability of freshwater, ecosystem health, pollutant transport, and flooding in these densely populated communities. However, groundwater dynamics, including the aquifer head distribution and subsurface salinity structure, in coastal aquifers are affected by multiple environmental forcings, …
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Mesometeorological modelling and trajectory studies during an air pollution episode in the lower Fraser Valley, British Columbia, Canada
… set of observation son the episode day. Pollutant transport on the modelling day was explored with a Lagrangian particle dispersion model. Specifically, forward trajectories were calculated for particles released at various locations in the Lower Fraser Valley and at different times. A …
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A synthetic unit sedimentgraph for ungaged watersheds
… and useful in the study of non-point source pollutant transport, in the estimation of sediment yield and in the design of sediment basins. At the present time, a physically sound method of deriving unit sediment graphs for ungauged small watersheds is not available. Based on synthetic …
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Champs-Multizone and Virtual Building for Integrated Building Systems Design and Performance Evaluation
… 1) developing a combined heat, air, moisture and pollutant transport model for whole building performance simulation; 2) developing a real-time building IEQ and energy performance monitoring system using a Virtual Building structure to facilitate fast comparison between design and montored …
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