Recent Submissions

  • Artificial ground water recharge with capillarity 

    Author(s):Ortiz, Nestor
    Date Issued:1977
    Format:doctoral dissertations
    The effect of the capillary region on the transient response of the water table to recharge was studied. A two-dimensional model was developed to simulate growth of groundwater mounds when flow and storage in the capillary ...
  • Digital model of a stream-aquifer system on the South Platte River near Sterling, Colorado, A 

    Author(s):Olson, Alan F.
    Date Issued:1973-06
    Format:masters theses
    A digital finite difference groundwater model was developed for a stream-aquifer system in northeastern Colorado. The general mathematical model and computer program used in the study were developed by the Groundwater staff ...
  • Numerical simulation of general hydrodynamic dispersion in porous medium 

    Author(s):Nalluswami, Marappagounder
    Date Issued:1971-08
    Format:doctoral dissertations
    A general two-dimensional equation of dispersion in a porous medium is presented. The second order linear partial differential equation describing the transient concentration distribution has mixed partial derivatives which ...
  • Irrigation water supply management 

    Author(s):Land, Larry F.
    Date Issued:1967-03
    Format:masters theses
    The major objective of this study was to illustrate a method for comparing allocation patterns on the basis of water-use efficiency and economic soundness. Two supporting objectives include presenting three methods for ...
  • Numerical modeling of groundwater contamination 

    Author(s):Kraeger, Catherine Eileen
    Date Issued:1972-06
    Format:masters theses
    The effectiveness of numerical models in simulating flow and behavior of contaminants in porous media has not previously been tested for complex boundary conditions encountered in most field problems. This study was ...
  • Hydraulic effects of underground nuclear explosions, Amchitka Island, Alaska 

    Author(s):Gonzalez, Don Diego
    Date Issued:1977
    Format:doctoral dissertations
    An intensive field study was undertaken as part of the U.S. Geological Survey Nuclear Hydrology Program to determine the response of drainage basins and groundwater aquifers to underground nuclear explosions. Measurements ...
  • Simultaneous solution for distribution of head in a two aquifer system 

    Author(s):Eckhardt, John R.
    Date Issued:1976-01
    Format:masters theses
    A general computer program, WTSHED4, was developed to simulate the simultaneous areal distribution of head in a two aquifer system as a result of natural and artificial influences to each aquifer. WTSHED4 was constructed ...
  • Immiscible multiphase flow in ground water hydrology: a computer analysis of the well flow problem 

    Author(s):Brutsaert, Willem
    Date Issued:1970-05
    Format:doctoral dissertations
    A mathematical analogue of immiscible multiphase flow in porous media is derived considering three compressible fluids -- two liquids and one gas. Isothermal conditions are assumed so that fluid properties such as ...
  • Conjunctive use of surface water and groundwater with different salinities in the Indus Basin of Pakistan 

    Author(s):Wu, Fang-Hong
    Date Issued:1974-06
    Format:doctoral dissertations
    A mathematical model for optimal conjunctive use of sur face water and groundwater is developed to determine canal and tubewell installed capacities in three different groundwater salinity zones. The objective is to minimize ...
  • Laminar and turbulent dispersion of miscible fluids in porous media 

    Author(s):Simpson, Harold D.
    Date Issued:1969-06
    Format:masters theses
    The phenomenon of longitudinal dispersion in the flow of miscible fluids through porous media was studied in this investigation. The relationship between the longitudinal dispersion coefficient and the average pore velocity ...
  • Water quality hydrology on surface mined watersheds 

    Author(s):Rowe, Jerry W.
    Date Issued:1976
    Format:masters theses
    Water quality and discharge on four watersheds disturbed by surface coal mining at the Edna Mine in northwestern Colorado have been monito red for about three years. Water quality and discharge have also been monitored in ...
  • Dispersion in groundwater flow systems 

    Author(s):Reddell, Donald Lee
    Date Issued:1969-12
    Format:doctoral dissertations
    A fundamental flow equation for a mixture of miscible fluids was derived by combining the law of conservation of mass, Darcy's law, and an equation of state describing the pressure-volume-temperature- concentration ...
  • Distribution of groundwater recharge 

    Author(s):Reddell, Donald L.
    Date Issued:1967-06
    Format:masters theses
    The primary objective of this study was to determine the average annual net rate and areal variation of natural recharge to the Ogallala Formation in the Northern High Plains of Colorado. This unconfined aquifer underlies ...
  • Galerkin simulation of hydrodynamic dispersion. 

    Author(s):Prakash, Anand
    Date Issued:1974-04
    Format:doctoral dissertations
    The problem of predicting salt-content of waters pumped by fully or partially penetrating wells in an aquifer, contaminated by salt-water intrusion on sea-coasts, indiscriminate pumping of deep saline aquifers or waste-water ...
  • Numerical simulation for convection of contaminants in groundwater 

    Author(s):Pittman, Leslie W.
    Date Issued:1977
    Format:masters theses
    A numerical model which simulates the convective transport of conservative ions through groundwater aquifers is presented and discussed. The model uses the fully implicit, central finite difference technique to predict ...
  • Statistical error analysis of ground water systems 

    Author(s):Bibby, Robert
    Date Issued:1971-03
    Format:doctoral dissertations
    A method is developed, which, by considering the input variables to a numerical model of flow in porous media as random variables, enables the accuracy of these input variables to be related to the accuracy of the output. ...
  • Physical microhabitat of trout 

    Author(s):Wickham, Marvin Gary
    Date Issued:1976-07
    Format:masters theses
    The physical microhabitat of stream-dwelling fishes is relatively unknown. Work done with albino brook trout suggests the operation of a previously unreported scheme of fish habitation, the focal point concept. This concept ...
  • Statistical and economic considerations for improving regulatory water quality monitoring networks 

    Author(s):Loftis, Jim C.
    Date Issued:1978
    Format:doctoral dissertations
    The assignment of sampling frequencies in regulatory water quality monitoring networks has often been performed with little or no statistical or cost-effectiveness analysis. The research effort described here has attempted ...
  • Simulation modeling of big game at Wichita Mountains Wildlife Refuge 

    Author(s):Williams, Gary Leroy
    Date Issued:1977
    Format:doctoral dissertations
    Certain aspects of the population ecology of herds of bison (Bison bison), elk (Cervus canadensis), white-tailed deer (Odocoileus virginianus), and Texas longhorn cattle (Bos taurus) inhabiting the Wichita Mountains Wildlife ...
  • Optimization of municipal sewage sludge injection 

    Author(s):Loftis, Jim
    Date Issued:1976
    Format:masters theses
    A major obstacle to the application of continuous subsurface injection as an effective sludge disposal method is the lack of techniques for planning and implementing sludge injection systems. This thesis is based upon ...

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