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  • Climate Change Impacts to Estuarine Hydrodynamics: Tools, Methodologies, and Predictions

    Creator:
    Parker, Kai A.
    Abstract:
    Coastal communities in the U.S. Pacific Northwest (PNW) are rapidly engaging with the idea that hazards and environmental pressures are changing and may be characteristically different in the near future. This has led to a need for scientific knowledge and tools that can help coastal communities prepare and build resilience...
    Resource Type:
    Dissertation

  • Nonlinear oscillations, bifurcations and chaos in ocean mooring systems

    Creator:
    Gottlieb, Oded
    Abstract:
    Complex nonlinear and chaotic responses have been recently observed in various compliant ocean systems. These systems are characterized by a nonlinear mooring restoring force and a coupled fluid-structure interaction exciting force. A general class of ocean mooring system models is formulated by incorporating a variable mooring configuration and the exact...
    Resource Type:
    Dissertation
    Full Text:
    R3 = a [(1+0) X3 -7 :422 X3 11,2 = [ 1 + (0 ±x1)2 2 X3 (12) (13) (14) and F11 FD1 = /41 31

  • The control and fate of enteric bacteria in the environment with particular emphasis on the factors influencing fecal indicator survival in waste storage facilities

    Creator:
    Crane, Stuart R.
    Abstract:
    The indiscriminate release of fecal bacteria to the environment can present a public health hazard when pathogenic species gain access to drinking and recreational water sources. The extent of bacterial contamination of surface and ground waters associated with animal production units and waste application areas seems largely dependent on the...
    Resource Type:
    Dissertation
    Full Text:
    bacteria in batch manure storage. Extension of this model to repetitively loaded storages proved less

  • The effect of pulverization on a lime stabilized clay soil

    Creator:
    Dito, Edward Leonard
    Abstract:
    The objectives of this investigation were to determine the effect of pulverization on the strength, durability and swell characteristics of a lime stabilized clay soil. Samples were prepared with three different gradations which represented the pulverization of the soil. Maximum clay lump sizes of 3/4", 1/2" and passing #4 sieve...
    Resource Type:
    Masters Thesis
    Full Text:
    , Bulletin 304:1 -13, Chu, T. Y. , D. T. Davidson, W. L. Goecker and Z. C. Moh, 1956, Soil stabilization

  • Behavior and load carrying capacity of stump anchors

    Creator:
    Stoupa, Joan
    Abstract:
    Research was conducted to study the behavior and load carrying capacity of stump anchors. A field testing program was undertaken to determine the response and strength characteristics of second growth Douglas-fir (Pseudotsuga menziesii) stumps ranging in diameter from 6 to 17 inches. Horizontal and vertical stump movements due to an...
    Resource Type:
    Masters Thesis
    Full Text:
    caused by obstructions that mechanically prevented root extension or by competition resulting from

  • Prediction of monthly streamflows for Oregon coastal basins using physiographic and meteorological parameters

    Creator:
    Orwig, Charles Edwin
    Abstract:
    Prediction equations were developed for estimating the flow regime at ungaged stream locations in the Oregon coastal range. Principal components analysis was used to screen the initial data set of physiographic and meteorological parameters. The final regression equations for predicting mean monthly flow had standard errors of estimate ranging from...
    Resource Type:
    Masters Thesis
    Full Text:
    drainage length is defined as the maximum stream dis­ tance between the gaging station and the extension

  • Numerical Simulation, Laboratory and Field Experiments, Analysis and Design of Wave Energy Converter and Mooring System

    Creator:
    Lou, Junhui
    Abstract:
    This dissertation studies the coupled fluid-structure interaction (FSI) of a wave energy converter (WEC) and evaluates the design of a WEC mooring system. The research is conducted in support of conceptual development, field test and performance evaluation of WECs as part of the mission of the Northwest National Marine Renewable...
    Resource Type:
    Dissertation

  • Equilibrium and Non-equilibrium Thermodynamic Modeling of Cement Pastes Containing Supplementary Cementitious Materials

    Creator:
    Glosser, Deborah B.
    Abstract:
    Thermodynamic modeling of cementitious material is an established tool for predicting the hydrated phase assemblages, pore solution pH, and pore solution composition of mixtures of various chemical compositions and water-to-binder (w/b) ratios. However, traditional thermodynamic techniques have major limitations for modeling mixtures containing supplementary cementitious materials (SCM), and when modeling...
    Resource Type:
    Dissertation
    Full Text:
    determining SCM reactivity. Chapter 2: Manuscript 1 – The first manuscript is entitled “Extension of

  • Tidal influence on downstream fining in gravel-bed rivers

    Creator:
    Coles, Derron Rafiq
    Abstract:
    This research examines the downstream fining phenomenon as it operates in coastal gravel-bed rivers of Oregon. Downstream fining is a change in bed composition toward smaller sediment sizes in the downstream direction. Changes in stream flow discharge and channel slope affect the rate of bed-load transport, thereby altering the downstream...
    Resource Type:
    Dissertation

  • Aerobic degradation of chlorophenols

    Creator:
    Wang, Gongming
    Abstract:
    Chlorinated phenols are toxic compounds and often released into natural environments from improper disposal or non-point sources. One important factor in assessing the environmental fate and transport is the rates of microbial degradation in soils and natural waters. In this study, eight chlorophenols (4-chlorophenol (4-CP), 2,4-dichlorophenol (2,4-DCP), 3,4-dichlorophenol (3,4-DCP), 3,5-dichlorophenol...
    Resource Type:
    Masters Thesis
    Full Text:
    . Technol., 18, 416-422. Barnhart, E.L. and Campbell, G.R., 1972, The effect of chlorination on selected