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Articles 1711 - 1740 of 1835
Full-Text Articles in Physical Sciences and Mathematics
Analog Computer Simulation Of The Runoff Characteristics Of An Urban Watershed, V. V. Dhruva Narayana, J. Paul Riley, Eugene K. Israelsen
Analog Computer Simulation Of The Runoff Characteristics Of An Urban Watershed, V. V. Dhruva Narayana, J. Paul Riley, Eugene K. Israelsen
Reports
In the syntheses of hydrograph characteristics of small urban watersheds, the distribution of water among the various phases of the runoff process is attempted by the concept of equivalent rural watershed. The urban parameters considered in the study are percentage impervious cover and characteristic impervious length factor. A mathematical model is developed for the equivalent rural watershed with precipitation as input. The hydrograph of outflow is obtained by chronologically deducting the losses due to interception, infiltration, and depression storages from precipitation and then routing through the watershed storage. This mathematical procedure is programmed on an analog computer and is tested …
Finite Difference Solutions To Free Jet And Confined Cavity Flows Past Disks With Preliminary Analyses Of The Results, Roland W. Jeppson
Finite Difference Solutions To Free Jet And Confined Cavity Flows Past Disks With Preliminary Analyses Of The Results, Roland W. Jeppson
Reports
A number of solutions are obtained to ideal axisymmetric flow past cavitating disks for both cases of a free surface jet and flow confined in a constant radius conduit. Finite difference methods are utilized in obtaining the solutions from an inverse formulation which considers the velocity potential, and Stokes’ stream function, as the independent variables and the radial and axial dimensions, r and z, as the dependent variables. The resulting inverse boundary value problem for r, for which the basis solution is obtained, is nonlinear. The solution technique uses a Newton-Raphson iteration to evaluate the implicit finite difference operator at …
Abstracts Of The Papers Presented At The Asce Hydraulics Division 17th Annual Specialty Conference, J. J. Leendertse, Robert P. Shubinski, E. L. Bourodimos, Calvin G. Clyde, Harl E. Judd, Dean F. Peterson, Roland W. Jeppson, James H. Milligan
Abstracts Of The Papers Presented At The Asce Hydraulics Division 17th Annual Specialty Conference, J. J. Leendertse, Robert P. Shubinski, E. L. Bourodimos, Calvin G. Clyde, Harl E. Judd, Dean F. Peterson, Roland W. Jeppson, James H. Milligan
Reports
No abstract provided.
A Perspective Of Contemporary Water Planning And Management Problems In Utah, Jay M. Bagley
A Perspective Of Contemporary Water Planning And Management Problems In Utah, Jay M. Bagley
Reports
I should like to discuss what I consider to be a few major problems Utah faces in connection with water and its development. Time will not permit great detail or breadth of discussion. The points I should like to discuss best can be made by first setting some hydrologic scenery. Actually, although hydrologic considerations provide the central melody to planning for water resources development, there are many socio-politico-legal-economic variations on the theme. My approach will be to remark briefly on thie environment in which today's planning must take place, provide some broad hydrologi guideposts, and with this backdrop select a …
Supplemental Final Report Wasatch Weather Modification Project, Utah Water Research Laboratory
Supplemental Final Report Wasatch Weather Modification Project, Utah Water Research Laboratory
Reports
No abstract provided.
Optimum Operation Of Desalting Plants As A Supplemental Source Of Safe Yield, Calvin G. Clyde, Wesley H. Blood
Optimum Operation Of Desalting Plants As A Supplemental Source Of Safe Yield, Calvin G. Clyde, Wesley H. Blood
Reports
No abstract provided.
Hydraulics Of Large Bed Element Channels, Harl E. Judd, Dean F. Peterson
Hydraulics Of Large Bed Element Channels, Harl E. Judd, Dean F. Peterson
Reports
No abstract provided.
State Organizational Patterns For Comprehensive Planning Of Water Resources Development, Daniel H. Hoggan
State Organizational Patterns For Comprehensive Planning Of Water Resources Development, Daniel H. Hoggan
Reports
No abstract provided.
Analysis Of Small Water Management Structures In Irrigation Distribution Systems, Gaylord V. Skogerboe, Wynn R. Walker, Brent B. Hacking, Lloyd H. Austin
Analysis Of Small Water Management Structures In Irrigation Distribution Systems, Gaylord V. Skogerboe, Wynn R. Walker, Brent B. Hacking, Lloyd H. Austin
Reports
The Irrigation and Drainage Research Conference conducted at Utah State University (ASCE, 1964) delineated many of the research needs regarding “Small Low- Cost Hydraulic Structures for Conveyance and Distribution Systems,” which was one of the six topics considered at the conference. In discussing possibilities for accomplishing the recommended research, it was suggested by some panel members that a considerable portion of the work could be undertaken by graduate students, particularly at the Master of Science level. The intent of this report has been to sort through the large volume of literature in an attempt to define the specific research needs …
Urgent Building Needs, Utah Water Research Laboratory
Water Quality Telemetry, Final Progress Report, Duard S. Woffinden, Allen D. Kartchner
Water Quality Telemetry, Final Progress Report, Duard S. Woffinden, Allen D. Kartchner
Reports
Water quality standards are now part of the legal code set up to control water pollution. In order to ascertain that these standards are being met, it is mandatory to monitor any river system over which control must be maintained. For optimum, usefulness, data on the monitored variables should be available on a real time basis at any time throughout the 24-hour day. Remote sampling stations and a telemetry link represent the most practical means of accomplishing this end. A water quality monitoring system utilizing radio telemetry has been developed at the Utah Water Research Laboratory (UWRL). The system consists …
The Effect Of Sediment Properties Of An Ultrasonic Plane Wave, G. H. Flammer, N. E. Stauffer Jr., E. Y. Liu
The Effect Of Sediment Properties Of An Ultrasonic Plane Wave, G. H. Flammer, N. E. Stauffer Jr., E. Y. Liu
Reports
No abstract provided.
Simulation Of The Hydrologic-Economic Flow System In An Agricultural Area, Murland R. Packer, J. Paul Riley, Harold H. Hiskey, Eugene K. Israelsen
Simulation Of The Hydrologic-Economic Flow System In An Agricultural Area, Murland R. Packer, J. Paul Riley, Harold H. Hiskey, Eugene K. Israelsen
Reports
Like the allocation of water resources among water users, the distribution of allocated water to the subusers requires an estimate of the economic costs and benefits from a number of distribution alternatives. The most satisfactory solution maximizes the benefit cost ratio. This study is based on the premise that equitable water distribution to agricultural subusers can be more easily accomplished through the use of a technique to predict the marginal value of agricultural water. A hydro-economic model is formulated to distribute the water supply to the crops and to determine the unit value of water for the given supply. By …
Analog Computer Solution Of The Unsteady Flow Equations And Its Use In Modeling The Surface Runoff Process, Utah Water Research Laboratory
Analog Computer Solution Of The Unsteady Flow Equations And Its Use In Modeling The Surface Runoff Process, Utah Water Research Laboratory
Reports
The flow of water on a watershed is usually unsteady and spatially varied, but can be adequately portrayed by the equations of momentum and continuity, commonly referred to as the unsteady flow equations. Because these equations are quasi-linear, hyperbolic, partial differential equations, they are not easily amenable to solution. Analog computer model~ of surface runoff generally have been based on simplified forms of these equations. As an improvement of those models, an analog computer solution is presented here for the unsteady flow equations. The solution involves the conversion of the partial differential equations in to a differential-difference system, and a …
Snowmelt Simulation, J. Paul Riley, Duane G. Chadwick, Keith O. Eggleston
Snowmelt Simulation, J. Paul Riley, Duane G. Chadwick, Keith O. Eggleston
Reports
The rapid growth in recent years of a variety of demands upon available water resources has lead to an increasing interest in more fundamental approaches to the science of hydrology. Accompanying this growth has been a need for an increased understanding of the snowmelt process. A completely adequate description of the entire physical process of snowmelt under all conditions is not yet available. The complex interrelated and variable nature of the snowmelt processes that occur simultaneously complicate the problem. A preliminary mathematical model of the snowmelt process has been developed in which processes such as pack settlement rates and energy …
Influence Of Mountain Groundwater On Streamflow, Bi-Huei Wang, Roland W. Jeppson
Influence Of Mountain Groundwater On Streamflow, Bi-Huei Wang, Roland W. Jeppson
Reports
This investigation has determined the quantities of water stored as groundwater in the three watersheds in Utah, Logan River upstream from State Dam, South Fork Ogden River upstream from Huntsville, and Weber River upstream from Oakley. The proportion of the total streamflow contributed from this groundwater storage has been determined from past streamflow records, and the knowledge obtained from the analysis of groundwater contribution to streamflow has been utilized in developing water supply forecasting techniques and procedures. The first phase of the study dealt with theory and methods from separating the groundwater component from the total streamflow hydrograph. The method …
Usu Telemetering Precipitation Gage Network, C. Earl Israelsen, Don L. Griffin
Usu Telemetering Precipitation Gage Network, C. Earl Israelsen, Don L. Griffin
Reports
A network of telemetering precipitation gages is operating in the mountainous areas of northern Utah, western Wyoming, and southern Idaho as part of the Wasatch Weather Modification Project. Approximately 40 individual gages collected and reported data during the 1968-69 winter season from distances up to 130 miles. In addition to the remotely located gages, the system includes an Automatic Readout Console (ARC) at the Utah Water Research Laboratory that is connected by a cable to a translator on top of Mt. Logan. The ARC is the control center for the network, interrogating in a predetermined programmed sequence the remote telemetry …
Cutthroat Flow Measuring Flumes For Flat Gradient Channels, Gaylord V. V. Skogerboe
Cutthroat Flow Measuring Flumes For Flat Gradient Channels, Gaylord V. V. Skogerboe
Reports
The cutthroat flume can operate either as a free or submerged flow structure. Submerged flow calibration curves and free flow equations have been developed. Rectangular cutthroat flume sizes of 1, 2, 3, 4, and 6 feet were studied and tested in the laboratory. Trapezoidal cutthroat flumes having zero (or V-shaped), 6-inch, and 12-inch throat widths were calibrated. The value of transition submergence is listed for each of the rectangular and trapezoidal cutthroat flumes. The most obvious advantage of a cutthroat flume is economy, since fabrication is facilitated by a flat bottom and removal of the throat section. Another advantage is …
Electronic Analog Computer Simulation Of The Paez-Pedraza Region Of Venezuela, J. Paul Riley, V. V. Dhruva Narayana, Kousoum S. Sakhan
Electronic Analog Computer Simulation Of The Paez-Pedraza Region Of Venezuela, J. Paul Riley, V. V. Dhruva Narayana, Kousoum S. Sakhan
Reports
Recently governments and universities in many South American countries have shown considerable interest in a planned and orderly development of available water resources. A case in point is the preliminary study reported in which the problem is approached by utilizing a general mathematical model of the hydrologic system. Specifically, the study involves simulation by means of an electronic analog computer of the hydrology of the Paez-Pedraza region of south western Venezuela. The various processes within the model are linked by the continuity-of-mass principle, which requires a hydrologic balance at all points. The analog computer is ideally suited to the solution …
Evaluation Of The Adequacy Of Streamflow Operational Hydrology, Roland W. Jeppson, Calvin G. Clyde
Evaluation Of The Adequacy Of Streamflow Operational Hydrology, Roland W. Jeppson, Calvin G. Clyde
Reports
No abstract provided.
James River Hydraulic Model: Multi-Purpose Marine Research Tool For Science, Government, And Industry, Virginia Institute Of Marine Science
James River Hydraulic Model: Multi-Purpose Marine Research Tool For Science, Government, And Industry, Virginia Institute Of Marine Science
Reports
No abstract provided.
Usu Remote Total Precipitation Telemetry Station, Duane G. Chadwick
Usu Remote Total Precipitation Telemetry Station, Duane G. Chadwick
Reports
A total precipitation catchment and telemetering device is described for use in mountainous regions. The precipitation transucer uses a weighing-type mechanism which has a variable inductor sensor.
The catchment system floats on springs and has negligible static friction. The radio transponder is powered by dry batteries. It responds upon coded interrogation, sending hydrologic or meteorological data through a mountaintop translator to a base station
Characteristics Of Sediments In The James River Estuary, Virginia, Richard Moncure, Maynard Nichols
Characteristics Of Sediments In The James River Estuary, Virginia, Richard Moncure, Maynard Nichols
Reports
This report presents data on the physical and chemical characteristics of bottom sediments in the James River estuary, Virginia. The data were generated as part of a comprehensive study of sedimentation in which the initial objective was to broadly define the distribution of sediment properties.
Oceanography In Virginia, William J. Hargis Jr.
A Conceptual Model Of The San Pitch River Basin, James D. Ballif
A Conceptual Model Of The San Pitch River Basin, James D. Ballif
Reports
To meet future expected needs for water, the State of Utah will have to plan and manage its limited resources in a judicious manner. Comprehensive water resources planning on a river basin basis is necessary to economically plan and develop the best combination of water uses. Efficient use and management of agricultural water is necessary to maximize the amount available for future needs. Irrigation water management must be improved. Improvements in the organization, storage, distribution, and method of application will be required to meet future demands. Consideration should be given to various combinations of conjunctive use of groundwater and surface …
Hydraulic Characteristics Of A Modified Venturi Section, Muhammad Aslam Rasheed
Hydraulic Characteristics Of A Modified Venturi Section, Muhammad Aslam Rasheed
Reports
The measurement of water in open channels on extremely flat grades is difficult because of the head loss that is necessary. A modified venture section, the contraction of which is provided by a top cover section mounted in a rectangular flume, is proposed to meet the requirements of a suitable measuring device for use in canals of flat gradients. The method of finite differences has been used for the mathematical solution to the idealized inviscid flow problem. This was followed by a laboratory investigation to ascertain the hydraulic characteristics of the proposed design. The experiments were conducted in a 3 …
Water Quality Telemetry First Annual Progress Report, Duard S. Woffinden, Allen D. Kartchner
Water Quality Telemetry First Annual Progress Report, Duard S. Woffinden, Allen D. Kartchner
Reports
No abstract provided.
Linear Programming With Random Requirements, Nak Je Kim
Linear Programming With Random Requirements, Nak Je Kim
Reports
Linear programming was first developed by George B. Dantzig, Marshall Wood, and associates of the U.S. Air Force, in 1947. At that time, the Air Force organized a research group under the title of project SCOOP (Scientific Computation of Optimum Programs). This project contributed to the developing of a general interindustry model based on the Leontief input-output model, the Air Force programming and budgeting problem, and the problems which involved the relationship between two-person zero sum games and linear programming. The result was the formal development and application of the linear programming model. This project also developed the simplex computational …
Water Resources Research - A Challenge To The Social Scientists, Dean F. Peterson
Water Resources Research - A Challenge To The Social Scientists, Dean F. Peterson
Reports
No abstract provided.
Feasibility Of Rating Current Meters In A Velocity Field, Gaylord V. Skogerboe, Lloyd H. Austin, Roland W. Jeppson, Chi-Yuan Wei
Feasibility Of Rating Current Meters In A Velocity Field, Gaylord V. Skogerboe, Lloyd H. Austin, Roland W. Jeppson, Chi-Yuan Wei
Reports
Preliminary studies employed an 8-inch (outlet diameter) contracting cone and an 8-inch converging nozzle. The design of the cone is based on an electromagnetic analogy reported by Smith and Wang, while the nozzle was designed assuming potential flow and using numerical methods to obtain the solution. Both designs yielded fairly uniform velocity fields, any deviations being primarily due to either construction or measurement techniques. The towing tank rating for a Pygmy current meter was compared with the submerged jet rating, the difference being 1 or 2 percent. A Prototype system was constructed using a 16-inch contracting cone (d). Two Type …