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Filtering by: Creator Ryan, J. P. Remove constraint Creator: Ryan, J. P. Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering Degree Name Master of Ocean Engineering (M.Oc.E.) Remove constraint Degree Name: Master of Ocean Engineering (M.Oc.E.)

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  • Wave field patterns generated by wave energy converters

    Creator:
    McNatt, J. Cameron
    Abstract:
    The eventual deployment of wave energy converters (WECs) on a commercial scale will necessitate the grouping of devices into arrays or "wave farms," in order to minimize overhead costs of mooring, maintenance, installation, and electrical cabling for shoreward power delivery. Closely spaced WECs will interact hydrodynamically through diffracted and radiated...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF J. Cameron McNatt for 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:
    of tidal cycle to reduce to q to fraction p of the original amount q volume of some dissolved

  • Hinged floating breakwater : theory and experiments

    Creator:
    Leach, Patrick A.
    Abstract:
    An analytical model is developed to examine the response and efficiency of a vertical rigid, hinged, floating breakwater. The boundary value problem describing the flow field yields a well-posed Sturm-Liouville problem which is solved by separation of variables for the velocity potentials. The equation of breakwater motion about the breakwater...
    Resource Type:
    Masters Thesis
    Full Text:
    o Wave length in deep water Length of breakwater M p Moment per unit width of breakwater caused

  • Wave interaction with rubble mound structures

    Creator:
    Yoo, Chul-hee
    Abstract:
    The objective of this study is the development and verification of an analytical solution for an unsteady flow field partially occupied by a permeable structure. Flow is induced by a small amplitude incident wave train and the permeable structure may contain multilayered anisotropic but homogeneous material. The analytical solution developed...
    Resource Type:
    Masters Thesis
    Full Text:
    ) in the xj direction, where j=1,2 in the two-dimensional flow field, p is water density, g is

  • Stability of pipelines under shoaling finite amplitude waves

    Creator:
    Huang, Min-chih
    Resource Type:
    Masters Thesis
    Full Text:
    criterion that may be ex- pressed in terms of a dimensionless wave force acting on the pipeline, P;, a

  • The analysis of directional wave spectra from current and pressure measurements

    Creator:
    Lin, Li-hwa
    Abstract:
    Directional wave spectra have been estimated in this study based upon simultaneous subsurface measurements of current and pressure. Two previously developed methods, the stochastic and deterministic approaches, have been reviewed and restudied. It is demonstrated by means of the Correlation Theorem that the stochastic and deterministic approaches are, under certain...
    Resource Type:
    Masters Thesis
    Full Text:
    97 c 4.3 Plot of dimensionless parameters E total/Etota1,1024 versus E p /E p,1024 99 4.4 Plot of

  • Nonlinear dynamic response of cable/lumped-body system by direct integration with suppression

    Creator:
    Sun, Yang, 1959-
    Resource Type:
    Masters Thesis
    Full Text:
    circular section the stretched cable diameter may be related to the unstretched cable diameter by p 40 X1

  • 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:
    in computer routines Hz Hertz JJ The maximum order of Dean's stream function theory K. J

  • 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:
    speeds of any magnitude over one xn,p.h. Velocities belowone m.p.h. down to 1 /16 m. p. h. are

  • 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:
    sinusoidal function A. lumped area for nodal position j a0, al proportionality factors for a Rayleigh type

  • 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:
    taken with the help of Bob Jensen. Dr. P. C. Klingeman and Dr. R. T. Hudspeth reviewed the final draft

  • A large scale model study of placed stone breakwaters

    Creator:
    DeBok, Donald H.
    Abstract:
    The results of three hydraulic model tests to evaluate the stability of a placed stone breakwater are presented and discussed. The prototype breakwater was designed to protect offshore power and port facilities in 60 feet of water and was tested at scale ratios of 1:10, 1:20, and 1:100. The armor...
    Resource Type:
    Masters Thesis
    Full Text:
    u. 8 u. a u. 1 1 1 a p a 1 + uj = g ()at 8 x. i p a x. 4- v a x. 3 x. J 1 J 3 unsteady convective

  • 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:
    ttwowel4:,Thimiciare!' f....")..tirs_ p......11.4111r0Olet.M2011.110%. PACIFIC OCEAN \-\Figure 1

  • Numerical simulation of sedimentation and circulation in rectangular marina basins

    Creator:
    Askren, David, 1947-
    Resource Type:
    Masters Thesis
    Full Text:
    node i Ni .,j=shape function for mid-section node p = pressure P = probability of deposition r

  • Hydrodynamic forces on a horizontal cylinder under waves and current

    Creator:
    Teng, Chung-chu
    Abstract:
    By assuming the linear superposition principle to be valid, the hydrodynamic forces on a horizontal cylinder under waves and current are examined. In this study, towing a cylinder in waves is used to simulate a cylinder under waves and current. The experimental technique is proved valid through theoretical considerations and...
    Resource Type:
    Masters Thesis
    Full Text:
    P = water mass density C d = drag coefficient Cm = inertia coefficient u = horizontal component

  • Use of benthic sediments as indicators of marina flushing

    Creator:
    Noble, Scott Morgan
    Abstract:
    This report presents the findings of a sediment analysis program formulated to determine the flushing potential of various shaped small boat marina basins. Chemical tests regarding volatile solids, Kjeldahl nitrogen, grease and oil, and sulfides were performed with the results compared to established sediment quality criteria. These results were used...
    Resource Type:
    Masters Thesis
    Full Text:
    ) Sampling Stations Figure 2. Astoria marina. 7 C J Columbia River c==, 1) I I I 0 [ 100 200 (meters

  • Sand waves in a pristine estuary

    Creator:
    Baliga, B. R. (B. Ravindranath)
    Abstract:
    The stochastic and the Fourier theories for sand waves developed by Lee(11) and Hino(6), respectively, for unidirectional flows are extended in order to estimate the rate of sediment turnover (RST) under oscillatory flows in the South Slough estuary, Coos Bay, Oregon. Data were collected by a mechanical and a sonic...
    Resource Type:
    Masters Thesis
    Full Text:
    in channel; I (0,.) () = indicator function; i = erosion; j = deposition; k = wave number; k o

  • Forces on a transverse circular cylinder in a steady uniform flow near a plane boundary

    Creator:
    Hafen, Blaine
    Abstract:
    An experimental study was conducted to determine the hydrodynamic forces on smooth and roughened circular cylinders as influenced by a nearby plane boundary. The ambient flow was perpendicular to the cylinder and parallel to the boundary. Measurements were taken in a water channel and a wind tunnel to obtain the...
    Resource Type:
    Masters Thesis
    Full Text:
    following analytical expressions found for the forces: FD = 0 oo m.m J k FL =-4 2 -a (q. +q ))3 j=o =o k

  • Ensemble-based data assimilation and depth inversion on the Kootenai River, ID, USA

    Creator:
    Landon, Kyle C.
    Abstract:
    Velocity measurements from drifter GPS records are assimilated and used in an ensemble-based inversion technique to extract the river bathymetry. The method is tested on a deep meandering reach and a shallow braided reach of the Kootenai River in Idaho, USA. The Regional Ocean Modeling System (ROMS) is used to...
    Resource Type:
    Masters Thesis
    Full Text:
    School, Monterey, California. Tossavainen, O. P., J. Percelay, A. Tinka, Q. Wu, and A. M. Bayen, 2008

  • 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:
    of Civil Engineering in charge of major Redacted for Privacy Head of D ....VK( p , m Y nt of

  • Large scale model testing of the FMC submerged wave attenuation device

    Creator:
    Huber, David S.
    Abstract:
    This report describes the hydrodynamic testing and evaluation of a one-tenth scale model of the FMC Wave Attenuation Device. The purpose of the test was to quantify the wave attenuation characteristics and structural loading induced by a test program of monochromatic incident waves on the submerged structure. The device was...
    Resource Type:
    Masters Thesis
    Full Text:
    . Dr. Larry S. Slotta and Dr. J. Nith offered advice and suggestions both during graduate work and

  • Wave forces on a horizontal circular cylinder near a plane boundary

    Creator:
    Wright, James Christopher
    Resource Type:
    Masters Thesis
    Full Text:
    wave measured from still water level (i) = Velocity potential p Mass density of fluid Fluid