Systematic treatment of the problem of infiltration, A

Submitted to Office of Water Resources Research, U.S. Department of Interior.Bibliography: pages 21-22.OWRR project no. B-033-Colorado, period July 1, 1968-June 30, 1971

Test variable for minimal time detection of basin response to natural or induced changes

Submitted to Office of Water Resources Research, U.S. Department of Interior.Bibliography: pages 14-15.OWRR project no. A-011-Colorado, period July 1, 1969-June 30, 1972

Multi-phase flow in porous media under cold conditions

CER74-75HJM38December 1974.Interim report

Systematic treatment of infiltration with application

Includes bibliographical references.Supported by funds provided by U.S. Dept. of the Interior, Office of Water Resources Research, Grant Agreement no. 14-31-0001-3566

Effects of boundary shape on channel seepage

CER61HJM84.Includes bibliographical references.Prepared under National Science Foundation grant.Under grant G-4126

Conjunctive operation of a surface reservoir and of groundwater storage through a hydraulically connected stream

February 1984.Includes bibliographical references.Project no. B-204-COLO, agreement no. 14-34-0001-9147; partially funded by the U.S. Dept. of the Interior as authorized by the Water Research and Development Act of 1978

Basic and regional characteristics of streamflow in the Upper Colorado River Basin: interim report

CER70-71GBE-HJMSS6.December 1970.Includes bibliographical reference (pages 23-24).Prepared for: Bureau of Reclamation, Division of Atmospheric Water Resources Management, Denver, Colorado, Project Skywater.This report describes the first phase of a research project concerned with two somewhat related subjects: 1. The study of the flow regimen of the rivers in the Upper Colorado River Basin and their relation to differences in geology, geomorphology, latitude, longitude, and physiographic parameters. 2. The application of such relations to the selection of hydrologically suitable basins for precipitation management. In this report, only general results about the flow characteristics of the streams in the Upper Colorado River Basin are presented. The determination of the streamflow characteristics was obtained from monthly flow data as published by the U.S. Geological Survey and corrected for diversions and regulations. Corrected records, stored on magnetic tape, for 707 stations were used in the study. From the monthly flow data mean yearly hydrographs have been computed for all stations. These hydrographs are expressed as specific yield in units of inches, cfs/sq. mi and liters per second per km2. The hydrographs are drawn on regular (linear), semi-logarithmic and double logarithmic scales. Monthly duration curves and mean yearly graphs of monthly coefficients of variation are also presented. This report contains a brief description of the methodology for the calculations, samples of computer output, tables of the calculated values and samples of various kinds of graphs which present in a concise and appealing visual way the characteristics of each gaging station. Maps with the results for the Colorado River Basin Project Area, a Bureau of Reclamation program of precipitation management in the San Juan Mountains area of Colorado, are given. A second report to be published later will contain an interpretation of the results and the implications for precipitation management.Under contract no. 14-06-D-6597

User's manual for LPTOR, a Fortran IV linear programming routine

CER75-76TJ-HJM36.Prepared for Office of Water Research and Technology under contract B-115-Colorado, Agreement No. 14-31-0001-5060.Includes bibliographical references (page 14).May 1976

Un modelo de descomposición hidrológica de un acuífero con fines de manejo

Se propone un modelo de descomposición hidrológica que permite el cálculo de coeficientes que representan el comportamiento de un acuífero. El modelo propuesto es muy ágil para acuíferos de gran extensión ya que se evitan las simplificaciones requeridas por otros modelos hidrológicos de aguas subterráneas cuando se emplean en modelos matemáticos de optimización para el manejo de los mismos. Se describe Ia aplicabilidad del modelo en el manejo de recursos hídricos subterráneos a través de modelos de optimización y se ilustra su utilización por medio de un ejemplo hipotético del manejo óptimo de un acuífero el cual debe ser explotado bajo restricciones especiales impuestas por la actividad económica de una porción del mismo.A mathematical model for the hydrologic decomposition of aquifers is formulated. The model permits the computation of coefficients which explicitely and accurately determine the behavior of the aquifer. The proposed model adapts well to large aquifers when used in combination of optimization schemes because simplifications required by other hydrologic models are avoided. The applicability of the model in the management of groundwater resources through optimization schemes is described. A hypothetical example of an aquifer to be managed under special constraints imposed by the economic activity of a portion of it, is used to ilustrate the applicability of the model