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Filtering by: Creator Johnson, Colin P. Remove constraint Creator: Johnson, Colin P. Decade 1980-1989 Remove constraint Decade: 1980-1989 Degree Field Civil Engineering Remove constraint Degree Field: Civil Engineering

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  • Estuarine sediment controls on trace metal distributions

    Creator:
    Davies-Colley, Robert J.
    Abstract:
    Sediments are the major compartment in aquatic environments for many materials of toxic or nutrient concern. The lack of knowledge of the phase associations of toxic metals in sediments is the largest deficiency in our understanding of the environmental hazard posed by metal contamination. This study examined the sedimentary partitioning...
    Resource Type:
    Dissertation
    Full Text:
    coefficient; Density of binding sites P n Partition coefficient PZC pH of the point of zero charge p -log

  • Evaluation of finite element techniques for soil reinforcement applications

    Creator:
    Berg, Ryan Robert
    Abstract:
    A literature review and a computer study are conducted to identify the requirements of finite element programs for the specific use of discrete analyses of reinforced soil structures. The utility of six commercially available programs are appraised with respect to the identified requirements. The results of the study are directed...
    Resource Type:
    Masters Thesis
    Full Text:
    analyses of reinforced soil structures (Al-Hussaini and Johnson, 1977; Chang, 1974). Purpose The purpose

  • Irregular points in wavemaker boundary value problem

    Creator:
    Tanaka, Yoshihiro
    Abstract:
    A global solution is presented that accurately accounts for the singular behavior at all irregular points. The linearized boundary value problem in a semi-infinite strip in the physical plane is transformed into a smooth unit disk by two successive conformal mappings. The global solution results from a Fredholm integral equation...
    Resource Type:
    Dissertation
    Full Text:
    domain P(ro,a,t) hydrodynamic pressure in the unit disk Ps(Y) hydrostatic pressure p(x,y,t

  • Field verification of a mathematical model for the physical fate prediction of dredged material instantaneously disposed at sea

    Creator:
    Hollings, William H.
    Abstract:
    Dredged spoil plumes are monitored during nine hopper dredge disposal events in 186 foot water depths offshore near Coos Bay, Oregon. Position and solids volume concentration characteristics of the plumes are established. Computer simulations of the monitored events are executed using the WES modified version of the Koh-Chang instantaneous disposal...
    Resource Type:
    Masters Thesis
    Full Text:
    Commencement June 1984 APPROVED: Redacted for privacy VW P esV sor of Civil Engineering in Charge of

  • A stochastic precipitation event model for use in erosion simulations

    Creator:
    Istok, J. D.
    Abstract:
    Mathematical models of the precipitation process are needed to effectively use historical precipitation data in the design and planning of engineering projects and for analysis of watershed runoff behavior. Existing simple models based on the assumptions of independent, identically-distributed random variables are insufficient to describe several features of the historical...
    Resource Type:
    Dissertation
    Full Text:
    p and q (p+q = 1) are the probabilities of an event and a nonevent at each discrete time and 13

  • Modeling solute transport by centrifugation

    Creator:
    Celorie, Jay A.
    Abstract:
    Measurement of physical and chemical solute transport properties of a soil/waste system is necessary to predict pollutant migration in soils. The adsorption component of solute transport is most often determined in the laboratory by performing column studies and batch equilibrium tests. Both of these methods suffer from disadvantages. Batch equilibrium...
    Resource Type:
    Masters Thesis
    Full Text:
    : L = L /N [2.3] in P where L is any vertical dimension and the subscripts m and p denote the model

  • Ocean wave-soil-geotextile interaction

    Creator:
    McDougal, W. G. (William George)
    Abstract:
    Geotextiles are synthetic fabrics which may be substituted for graded aggregate to protect ocean and coastal structures from erosion and soil instability adjacent to the structure. They are commonly used as a filter and as a structural membrane between an undisturbed sediment surface below and an erosion resistant coarse aggregate...
    Resource Type:
    Dissertation
    Full Text:
    developed which include bottom friction [Putnam and Johnson (1949), Hunt (1952, 1964), Case and Parkinson

  • Random wave forces on cylinders

    Creator:
    Hsu, Ming-kuang
    Abstract:
    The in-line force power spectrum is predicted by the frequency domain maximum force coefficient [C[subscript μn](z,f[subscript n])] vs. Keulegan-Carpenter number [K[subscript n] (z,f[subscript n])] relationship. The frequency domain Keulegan- Carpenter number is defined as the velocity from the amplitude spectrum at f divided by the respective frequency and diameter of...
    Resource Type:
    Dissertation
    Full Text:
    (z,fn) C H n (z) p C T n (z) p C V n (z) p Total force coefficient, see Eq. (2.1-1

  • Nonlinear hydrodynamic response of curved singly-connected cables

    Creator:
    Chiou, Rueybin
    Resource Type:
    Dissertation
    Full Text:
    the Morison equation. The Morison equation as originally proposed by Morison, O'Brien, Johnson, and

  • Land surface energy balance and surface soil moisture variation in HAPEX-MOBILHY

    Creator:
    Nichols, William E.
    Abstract:
    The HAPEX-MOBILHY regional experiment provided an significant opportunity to analyze the partition of energy and distribution of water over land surfaces. The combination of remotely sensed data and ground instrument networks over the large-scale in situ experiment allowed investigation of spatial and temporal variation of such hydrologic parameters as the...
    Resource Type:
    Masters Thesis
    Full Text:
    equation; H= where pc,(T, Ta) rah P = density of air, kg iTC-3 C = volumetric heat capacity of air, J