UMD Theses and Dissertations

Permanent URI for this collectionhttp://hdl.handle.net/1903/3

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a given thesis/dissertation in DRUM.

More information is available at Theses and Dissertations at University of Maryland Libraries.

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Author: search.filters.author.Olszewski, Jennifer Marie

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    THE DEVELOPMENT, CALIBRATION, AND USE OF A SPATIO-TEMPORAL MODEL FOR THE DESIGN AND EVALUATION OF CONSTRUCTED WETLANDS BASED ON SUSTAINABLITY METRICS
    (2014) Olszewski, Jennifer Marie; McCuen, Richard H; Civil Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    The focus of this research was the development of a spatio-temporal model of a constructed wetland that can be used to evaluate policy elements and design practices from the perspective of wetland sustainability. The model was calibrated with data obtained from a wetland that treats runoff from an agricultural field. Sustainability metrics were developed to reflect an array of wetland functions including wildlife habitat, flood control, downstream hydrologic regime, wetland water balance, groundwater recharge and baseflow maintenance, aesthetics, and water quality functions. The model can be optimized by the user across this array of wetland functions, each of which was defined in terms of metrics relevant to sustainability. Stakeholders will be able to weight the metrics for each of these wetland functions in order to maximize sustainability for their specific goals. Optimally, this model will aid design engineers and policy makers in designing constructed wetlands as a function of necessary functions, location, and influent water quantity and quality characteristics.
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    The Hydrologic and Water Quality Performance of the Sligo-Dennis Bioretention Cell
    (2010) Olszewski, Jennifer Marie; Davis, Allen P; Civil Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Bioretention cells have been found to improve the hydrologic and water quality performance of impervious areas such as parking lots. The current study recorded hydrologic data from a bioretention cell in Silver Spring, MD, over a period of 2 years, collecting water quality data from 14 storm events. Data showed the cell completely captured storm events that produced less than or equal to 1.27 cm of rainfall, after which a linear relationship between cell outflow and cell inflow was observed. The cell was found to reduce the site CN from 96 down to 79 and to have a CN of 96 when assessed as a separate land use. The hydrologic performance was also compared to that of a forested stream near Baltimore, MD. While the cell performed similarly volumetrically for storms producing less than or equal to 2 cm of rainfall, the Sligo-Dennis flow-durations were typically half the length and double the flowrate of those of the forested stream.