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Filtering by: Creator Mahaffee, W. F. Remove constraint Creator: Mahaffee, W. F. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering Rights Statement In Copyright Remove constraint Rights Statement: In Copyright

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  • Tidal range changes in the Delaware Bay : past conditions and future scenarios

    Creator:
    Hall, George F.
    Abstract:
    Throughout the Holocene, appreciable changes in bathymetry are hypothesized to have resulted in large changes to tidal datums in coastal and estuarine areas. An understanding of tidal change is an important contribution to the knowledge of relative historical sea-level change and future coastal planning. To test this hypothesis, the Advanced...
    Resource Type:
    Masters Thesis
    Full Text:
    George F. Hall for the degree of Master of Science in Civil Engineering presented on May 21, 2012

  • Coupled wave and surge modeling of Tillamook Bay, Oregon : extreme events and climate change impacts

    Creator:
    Cheng, Tiffany Kay
    Abstract:
    Estuaries represent the confluence of land and ocean environments and encompass a number of complex interactions amongst tides, winds, offshore waves and the riverine contributions, all of which contribute to total water levels (TWLs). The study of TWLs and the relative weight of its components can assist local communities in...
    Resource Type:
    Masters Thesis
    Full Text:
    Impacts Abstract approved: ______________________________________________________ David F

  • 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
    Full Text:
    David F. Hill Coastal communities in the U.S. Pacific Northwest (PNW) are rapidly engaging with

  • Tsunami propagation in large rivers : idealized cases and the Columbia River Estuary

    Creator:
    Kalmbacher, Kirk D.
    Abstract:
    The hazards associated with tsunamis are well known and have been studied for decades. The majority of research is, however, focused on open coastlines which bear the brunt of a tsunamis force. Other regions that can be strongly impacted by a tsunami are large estuaries. Here, the tsunami encounters a...
    Resource Type:
    Masters Thesis
    Full Text:
    : _______________________________________________________________ David F. Hill The hazards associated with tsunamis are well known and have been studied

  • Remote Sensing Tools for Evaluating Climate Change Impacts in Coastal Environments

    Creator:
    Herrmann, Joan F.
    Abstract:
    Climate change has pervasive impacts on Earth’s diverse ecosystems. Observed and projected effects that impact coastal environments pose unique challenges. Coastal regions provide numerous ecosystem services (e.g., fisheries, nursery habitats, erosion control, and water filtering and detoxification), house 40% of the US population, and contribute to 58% of the national...
    Resource Type:
    Masters Thesis
    Full Text:
    Oregon’s central Pacific Coast (approximately 44°43'45.9"N 124°03'30.8"W). This area constitutes an area

  • Aqueous-organic partition coefficients for Rn-222 and their application to Radon analysis by liquid scintillation methods

    Creator:
    Cantaloub, Michael G.
    Abstract:
    A method is described for determining the partition coefficient, K, for radon gas distributed between an aqueous phase and an organic solvent. The method uses sequential extractions of radon into equal volume aliquots of organic solvent. The radon-laden organic liquid is then counted on a liquid scintillation analyzer with alpha-beta...
    Resource Type:
    Masters Thesis
    Full Text:
    , would be F= (4)w 00 + W W Ky0 + w where V and V0 are the volumes (mL) of the aqueous and organic phases

  • Depth-dependence of surf zone eddies : a study at Duck, NC

    Creator:
    Aiken, Rebecca A.
    Abstract:
    Surf zone eddies (f < 0.01 Hz) are important in nearshore mixing, shoreline erosion, the distribution of pollutants, and ecological processes, such as offshore transport of larvae. Surf zone eddies have traditionally been treated as two-dimensional features with horizontal length scales larger than the local water depth. Studies by Lippmann...
    Resource Type:
    Masters Thesis
    Full Text:
    , the three-dimensional Eulerian currents are represented by (u,w); f is the Coriolis force; φ is the

  • Developing safety performance functions for 4-leg single-lane roundabouts based on Oregon data : a case study

    Creator:
    Zheng, Jianfei
    Abstract:
    Roundabouts have become an alternative for traditional intersections due to the safer operational performance. Previous research has provided crash modification factors (CMFs) as a criterion based on before-after studies as to evaluate the safety performance of roundabouts. One drawback of assessment based on crash modification factors, however, is that a...
    Resource Type:
    Masters Thesis

  • Characterization of reinforced fill soil, soil-reinforcement interaction, and internal stability of very tall MSE walls

    Creator:
    Walters, James J.
    Abstract:
    In many geotechnical design situations involving tight right-of-way constraints, Mechanically Stabilized Earth (MSE) walls are often the most cost-effective and reliable earth retention technology among available alternatives. However, few well-documented case histories with detailed material testing, instrumentation programs and construction observation of performance are available in the literature. Despite the...
    Resource Type:
    Masters Thesis
    Full Text:
    W. Stuedlein In many geotechnical design situations involving tight right-of-way constraints

  • Reliability-based Serviceability Limit State Design Procedures for Shallow Foundations

    Creator:
    Huffman, Jonathan C.
    Abstract:
    Reliability-based geotechnical foundation design focusses on soil and structure analysis that meets necessary safety, performance and/or serviceability criteria, calibrated based on probabilistic analyses and an accepted level of risk. As the civil engineering community seeks to better harmonize geotechnical and structural design methodologies, reliability-based design is being incorporated more into...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Armin W. Stuedlein Reliability-based geotechnical foundation design focusses on soil and