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Filtering by: Creator Hedge, Z. N. Remove constraint Creator: Hedge, Z. N. Decade 1970-1979 Remove constraint Decade: 1970-1979 Degree Name Master of Ocean Engineering (M.Oc.E.) Remove constraint Degree Name: Master of Ocean Engineering (M.Oc.E.)

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  • An underwater acoustic imaging system

    Creator:
    Kolar, Michael John
    Abstract:
    An experimental underwater acoustic imaging system has been designed and built. Operating at 650 KHz, real time acoustic images are obtainable. Using both geometrical optics and Fourier optics, the theory of image formation and resolution is presented. Other factors affecting image quality and system acuity are also discussed. System components...
    Resource Type:
    Masters Thesis
    Full Text:
    to the Z-axis input of an oscilloscope. Each channel amplifier is switched, in sequence, by solid

  • An eigenvalue wave analysis of a fixed semi-immersed rectangular structure

    Creator:
    Steimer, Robert Bruce
    Abstract:
    The problem of a fixed rectangular structure of unit width in a train of simple harmonic normally-incident waves is modeled. The solution allows for variable (1) length and draft of structure, (2) differing depths in the three (fore, aft, and beneath the structure) distinct regions, and (3) wave period. The...
    Resource Type:
    Masters Thesis
    Full Text:
    surface boundary condition requires that 1 ao n = g at z = = 0 where n is the water surface elevation

  • Wave interaction with pile supported harbor facilities

    Creator:
    Dummer, Jerome Martin
    Resource Type:
    Masters Thesis
    Full Text:
    for varying values of C , S . C 1.0, S 1.39. 2.30mx x mz z 7. 19. Reflection and transmission

  • Finite amplitude deep water waves : a comparison of theoretical and experimental kinematics and dynamics

    Creator:
    Jensen, Robert E.
    Abstract:
    Problems associated with quantification of deep water wave kinematics and dynamics are examined. Summaries of Stokes' theory and Dean's stream function theory are reported. A computer algorithm is developed to solve the hydrodynamic characteristics for Stokes' fifth and third order and linear theories. Tests are initiated to verify the results...
    Resource Type:
    Masters Thesis
    Full Text:
    -- = w at z = n(x,t) dt Dt 9x (2.1.10) where n represents the free surface profile relative to the

  • Dynamic response of an offshore structure to measured and simulated stochastic wave forces

    Creator:
    Grecco, Michael G.
    Abstract:
    The dynamic response of an offshore structure to measured and simulated stochastic wave forces is investigated. The theoretical nondeterministic analysis is performed in the frequency domain for a two-dimensional model. The ocean wave system is assumed to be a zero mean, stationary, ergodic Gaussian process described by a one-dimensional wave...
    Resource Type:
    Masters Thesis
    Full Text:
    and -d < z < n, where d is the water depth and n is the instantaneous water surface elevation. Small

  • Airphoto analysis of estuarine circulation

    Creator:
    Weise, Harry Gordon
    Abstract:
    Aerial photography has become a valuable method of acquiring information on estuarine current circulation patterns. The method provides a comprehensive picture of nearly simultaneous surface water movements. It represents a significant improvement over conventional surface float and current meter methods because large areas may be covered in great detail with...
    Resource Type:
    Masters Thesis
    Full Text:
    specifications are the identification number and X, Y, and Z coordinates of three ground control points. 26

  • Chetco River tidal hydrodynamics and associated marina flushing

    Creator:
    Tang, Shing Shirly
    Abstract:
    The purpose of this study was to provide an understanding of the interrelationships between fresh and salt water Circulation, tidal transport and flushing patterns in the Chetco River estuary and its boat basins. Field work and water quality measurements were conducted at the entrance of the Chetco River during 1975...
    Resource Type:
    Masters Thesis
    Full Text:
    Data 9...iihil7P049-` I pedal.; peoera/. ,41.2intencince Prciecl 0 C' E A N SCALE 400 0 400 SOO feet

  • Flows associated with harbor ship traffic

    Creator:
    Downs, Richard Allen
    Abstract:
    The purpose of this study was to ascertain the potential erosion impacts associated with ship movements in confined waters. The flow associated with a ship passage can be separated accordingly: (1) the propeller wake, (2) flow about the hull, and (3) associated waves. Each of these areas has been analyzed...
    Resource Type:
    Masters Thesis
    Full Text:
    (IS) The boundary conditions on the unknown free surface z = n(x,y) (16) are firstly that the

  • Pollution and tidal flushing predictions for Oregon's estuaries

    Creator:
    Choi, Byungho
    Abstract:
    The overriding goal of this study was to provide first order estimates of dilution and tidal flushing of waste discharges released hypothetically into various Oregon estuaries during critical low flows and tides. Causal relationships between discharged wastes and subsequent estuarine response were studied. Various approaches to determine the assimilative capacity...
    Resource Type:
    Masters Thesis
    Full Text:
    fraction of freshwater in nth segment K1 first order decay coefficient K2 reaction coefficIent n number

  • Seasonal variations in tidal dynamics, water quality and sediments in the Alsea Estuary

    Creator:
    McKenzie, David Roller
    Abstract:
    During 1973 data was collected to analyze the seasonal variations of the tidal dynamics, water quality and sediments of the Alsea Estuary. A summary of historical information with a list of all known alterations to the estuary was made. A complete physical description, including the geographical setting and mixing classification...
    Resource Type:
    Masters Thesis
    Full Text:
    Introduction 88 Wate-r Quality Stat.fon Depths 88 93 101 vr n 102 Suffm.,1( 103 Fal; 103 Conclusions 104