Search Constraints

Start Over
Filtering by: Creator Krause, Jeffrey W. Remove constraint Creator: Krause, Jeffrey W. Committee Member Istok, Jonathan D. Remove constraint Committee Member: Istok, Jonathan D.

Search Results

  • Evaluation of copper removal from stormwater runoff using compost and Apatite II™

    Creator:
    Silvertooth, Jason R.
    Abstract:
    Low concentrations of dissolved copper have proven to be harmful to a number of aquatic organisms, with recent research highlighting detrimental effects to endangered salmonid species. Stormwater runoff can represent a significant source of copper to surface waters, necessitating cost-effective alternatives to current stormwater best management practices (BMPs). This study...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Jeffrey A. Nason Low concentrations of dissolved copper have proven to be harmful to

  • Evaluation of Apatite II™ for removal of copper and zinc from highway stormwater runoff : laboratory and field experiments

    Creator:
    Provolt, Justin J.
    Abstract:
    Current best management practices (BMPs) for stormwater treatment are not able to adequately remove heavy metals to levels which do not adversely affect aquatic life. Copper is commonly found in highway stormwater runoff, with the primary source being brake pad wear. Copper is of particular concern due to inhibitory effects...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Jeffrey A. Nason Current best management practices (BMPs) for stormwater treatment are not

  • Copper Speciation in Wastewater-Impacted Surface Waters

    Creator:
    Mosbrucker, Ariel M.
    Abstract:
    This study investigates the relationship between total and ionic copper in samples taken from the Tualatin River and wastewater treatment facilities (WWTFs) that discharge into the Tualatin River. Copper speciation was analyzed by determining conditional stability constants and densities of copper binding ligands on the dissolved organic matter (DOM) in...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract Approved: Jeffrey A. Nason This study investigates the relationship between

  • On Undular Bores and Solitary Waves in Variable Depth

    Creator:
    Knowles, Jeffrey N.
    Abstract:
    Numerical results are presented using a higher-order pseudo-spectral method in order to solve the Zakharov-Craig-Sulem formulation of the Euler model. We study the effects of variable bathymetry on weakly-dispersive, weakly-nonlinear, shallow water waves. Improved predictions on wave amplitude and shoaling behavior are developed by analytical means in the context of...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERATION OF Jeffrey N. Knowles for the

  • Removal of E. coli with alternative media Biosand filters

    Creator:
    Fulton, Nathan J.
    Abstract:
    When Biosand filters cannot be constructed with crushed quarry rock due to resource limitations, a suitable alternative filter media is needed. In this research, two crushed quarry rock alternatives were examined. Three bench-scale Biosand filters with crushed rock, beach sand, and heat-treated beach sand media were simultaneously dosed with Willamette...
    Resource Type:
    Masters Thesis

  • Bacterial hydrophobicity : assessment techniques, applications and extension to colloids

    Creator:
    Saini, Gaurav
    Abstract:
    This research details laboratory assessment of bacterial hydrophobicity, variations in bacterial adhesion properties with growth and extended starvation as well as extension of this assay to colloidal hydrophobicity measurement. Hydrophobicity is an integral component of surface interactions and has been studied extensively for its role in a number of engineering...
    Resource Type:
    Dissertation

  • Experimental demonstration and modeling of aerobic cometabolism of 1,4-dioxane by isobutane-utilizing microorganisms in aquifer microcosms

    Creator:
    Rolston, Hannah M.
    Abstract:
    1,4-dioxane, a probable human carcinogen at low (< 1ppb) concentrations, has emerged as a groundwater contaminant due to its historical use as a stabilizer for the chlorinated solvent 1,1,1-trichloroethane. Aerobic cometabolism, the use of a primary substrate to induce the production of microbial enzymes that fortuitously degrade other compounds, is...
    Resource Type:
    Masters Thesis
    Full Text:
    bioaugmented microcosms that received equal inorganic nutrient amendment (“Native +N” and “Bioaug W+N”). Error

  • Simulation of drag reduction due to multi-aligned spheres

    Creator:
    Lindqvist, Varna
    Abstract:
    A method was sought to predict the flight paths and collisions for closely spaced ink droplets of various sizes as a design aid for ink-jet printing development. Computational fluid dynamics models of two rigid aligned spheres, as a proxy for ink droplets, were initiated in atmospheric pressure air at constant...
    Resource Type:
    Masters Thesis
    Full Text:
    substituting the constant freestream velocity, U, for the u, v, and w velocity components in the inertia term

  • Hydraulic influences on pool morphology : a laboratory investigation

    Creator:
    Frizenschaf, Jacqueline
    Abstract:
    A flume study was conducted to investigate the influences of changing hydraulic conditions on the bed morphology of a scoured pool. During a simulated storm runoff event, responses of the pool were tested under different conditions: clearwater flow, sediment supply at steady rates, and two different sediment mixtures of the...
    Resource Type:
    Masters Thesis
    Full Text:
    Institute. Last but not least, I want to thank the special person in my life, Jeffrey D. Connor who gave