Civil and Environmental Engineering Commons^™

Performance Evaluation Of An Existing Seven Cell Lagoon System, James H. Reynolds, Ralph E. Swiss, Christine A. Macko, E. Joe Middlebrooks

Reports

No abstract provided.

Water Flow Patterns In Heterogeneous Soils Under Trickle Irrigation, Abdolhossien Nassehzadeh-Tabrizi, Roland W. Jeppson, Lyman S. Willardson

Reports

No abstract provided.

Growth And Uptake Dynamics Of Selenastrum Capricornutum Parameterized By Percent Nitrogen, Ronald F. Malone, Kenneth A. Voos, William J. Grenney

Reports

Batch cultures of

The Virgin River Basin Study: A Regional Approach To Multiobjective Planning For Water And Related Resources, John E. Keith, Jim Mulder, Trevor C. Hughes, V. A. Narasimhan, Lance Rovig, Karl Eriksen, Don D. Fowler, Lucinda Borchard, Kirk Kimball, Spence Ballard, K. S. Turna, Daniel H. Hoggan

Reports

A joint research effort by the Utah Water Research Laboratory and the Nevado Center for Water Resources Research applied two multiobjective planning models to the Virgin River Basin in order to test the efficiency and practicality of applying such tools in water resrouces planning. The surrogate Worth Trade-off (SWT) method couples mathematical optimization to quantify trade offs among noncommensurable objectives with interviews to compare public preferences with respect to these trade offs. PROPDEMM uses information on interest group objectives, balues, willingness to pay, influence, lebel of information, etc. to compare the political feasibility of alternative courses of action. Both models …

A Model Of Environmental Transport Of Heavy Metals Originating From Stack Derived Particulate Emission In Semi-Arid Regions, J. J. Jurinak, William J. Grenney, Gene L. Wooldridge, J. Paul Riley, R. J. Wagenet

Reports

Executive Summary:

Effects Of Soil Heterogeneity On One-Dimensional Infiltration, Charles Courette, Roland W. Jeppson

Reports

A parameter study for heterogeneous infiltration was performed employing a one-dimensional computer program. Soil heterogeneity was defined by linear variations of soil parameters. From the solutions obtained, the instantaneous and accumulative infiltration rates were correlated versus the rate in which the parameters varied in the soil profile. The end result being coaxial graphs from which a relative infiltration rate may be obtained by inputting time and the rates of change of various soil parameters.

Estimation Theory Applied To River Water Quality Modeling, David S. Bowles, William J. Grenney, J. Paul Riley

Reports

The extended Kalman filter (EKF) is used to represent BOD, DO, and nitrogen cycling in a 36.4 miles (58.6 km) stretch in the Jordan River, Utah, under the assumption of steady-state conditions. Approximate minimum variance estimates of the water quality parameters are provided by the EKF filter. These estimates are obtained through a combination of two independent estimates of the state of the river water quality system: (1) predictions of the system state from a "phenomenologically meaningful" process model of the biochemical and stream transport processes; and (2) measurements of the water quality parameters. These two estimates are combined by …

Upgrading Aerated Lagoon Effluent With Intermittent Sand Filtration, Richard P. Bishop, James H. Reynolds, Daniel S. Filip, E. Joe Middlebrooks

Reports

Intermittent sand filtration was evaluated as a means of upgrading the quality of aerated lagoon effluents to satisfy the requirements of PL 92-500. The aerated lagoon in question treats the wastes from a milk and cheese factory located in northern Utah. The treatment system consists of two diffused air aeration ponds followed by a facultative settling pond, were applied to pilot scale intermittent sand filters with 0.17 mm and 0.40 mm effective size sands. The filters were loaded hydraulically from 0.25 million gallons per acre per day to 1.0 million gallons per acre per day. It was found that sand …

Environmental Quality Management In A Region With External Development Pressures, A. Bruce Bishop, Rangesan Narayanan, Lloyd E. Peterson, Roger D. Hansen, Matthew B. Conover

Reports

The objective of this study was to examine the problems of managing residuals and environmental quality in a region facing potentially rapid growth as a consequence of externally made development decisions. The research adapted and applied the residuals environmental management concept which recognizes the need for an integration of physical methods, implementation incentives and institutional arrangements in controlling air, water and solid residuals. The area selected for study, the Uintah Basin in Southeastern utah, has the potential for extensive energy resource and mineral development and could experience a large population influx and accelerated economic growth as a result. in the …

Runoff Estimates For Small Rural Watersheds And Development Of A Sound Design Method: Volume I. Research Report, Joel E. Fletcher, A. Leon Huber, Frank W. Haws, Calvin G. Clyde

Reports

Foreword: This report is composed of thee volumes; Volume I is the Research Report; Volume II consists of recommendations for establishing design manuals and Appendices B, C, D, E, F, G, and H, which are the design aids required for establishing design manuals; Volume III consists of Appendix A, and accumulation of the data base used in the study, FHWA chose to arrange the report as described to facilitate distribution of the results. The methods reported herein are designated as the Federal Highway Administration Methods are designed to be applied to watersheds smaller than 50 square miles but may be …

Runoff Estimates For Small Rural Watersheds And Development Of A Sound Design Method. Volume Ii, Recommendations For Preparing Design Manuals And Appendices B, C, D, E, F, G, & H, Joel E. Fletcher, A. Leon Huber, Frank W. Haws, Calvin G. Clyde

Reports

Frequency analyses of more than 1,000 small watersheds in the United States and Puerto Rico were used to develop the estimation method for design of peak flow for ungaged watersheds. This method, called the Federal highway Administration (FHWA) method, is conceptually similar to the Bureau of Public Roads (BRP) method developed by W. D. Potter. The FHWA method relates the runoff peak to easily determined hydrophysiographic parameters and is intended for use on watersheds smaller than 50 square miles. The concept of risk is incorporated inot the design procedure. The risk is the probability that one or more events will …

Mixed Integer Programming Models For Water Resources Management, Brad A. Finney, William J. Grenney, A. Bruce Bishop, Trevor C. Hughes

Reports

A regional water quality control model is developed by linking a steady-state water quality simulation model with an optimization model. The water quality simulation model can be applied to complex river systems with both point and nonpoint loads using multiple interdependent pollution parameters described by either linear or nonlinear equations. Twelve water quality parameters can be modeled simultaneously: four non conservative constituents (or conservative constituents if the decay rate is set equal to zero); coliform bacteria (MPN); phosphorus; biochemical oxygen demand (BOD); ammonia (NH3); nitrate (NO3); dissolved oxygen (DO); temperature (°C); and algae. The water quality model is used to …

Ole Miss Engineer 1976

Ole Miss Engineer

No abstract provided.

A Possible Explanation Of Concrete Pop-Outs, James H. Havens, Robert C. Deen

Kentucky Transportation Center Research Report

This report summarizes several years of research relating to damage to concrete and aggregates undergoing freezing and thawing. Basic principles involving freezing and attendant pressures are considered. Application of these principles to the evaluation of concrete was accomplished in experiments on concrete having low and high air contents.

Freeze-thaw characteristics of saturated aggregates relative to physical properties such as porosity, absorption, and bulk specific gravity were studied by submerging individual particles in pre-chilled mercury. Pressures associated with pop-outs in concrete were monitored and are presented along with accompanying theoretical considerations.

Raised-Aggregate, Lane-Delineation Stripe, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

Experimental raised-aggregate (1/2 inch (13 mm) to 1 inch (25 mm)) traffic stripes were installed on approximately 0.4 mile (644 m) of US 60 just north of the intersection with US 421 in Franklin County. Installation was during June 1974. Aggregate stripes were painted yellow and used as skip lines inside the continuous channelization stripes to indicate no crossing into the two-way, left-turn lane except for turning movements.

Observations indicated that the raised-aggregate stripes had good durability after being exposed to 2 years of wear. During dry, nighttime conditions, the paint stripes were slightly more effective than the aggregate stripes; …

Statewide Survey Of Skid Resistances Of Pavements [Dec. 1976], Rolands L. Rizenbergs, James L. Burchett, Larry A. Warren, William M. Sampson

Kentucky Transportation Center Research Report

Since 1969, when a research-type, skid-test trailer was acquired, U.S. routes were surveyed in 1970 and 1971, and the interstate and toll road systems were surveyed in 1971. The data were used for research purposes and have been reported. The interstate and toll road systems were surveyed again for research purposes in 1974. Since October 1974, surveys have been performed under a highway safety project grant. All primary and principal secondary roads, involving 4,612 miles (7425 km), were surveyed in 1975. The 1974 and 1975 surveys, data reported herein, represented 25 percent of the mileage of rural, state-maintained roads in …

A Numerical Solution For The Ultimate Strength Of Tubular Beam-Columns, Arnold L. Wagner

Dissertations and Theses

To provide a basis for the development of interaction curves for tubular beam-columns of annular cross section, a general purpose beam-column computer program is developed, and used to determine ultimate load capacities. The paper presents the analytical model and the computer method. The analytical results are compared with published test data as well as experimental data obtained as part of this project.

Modification Of Kentucky’S Adequacy-Rating Techniques, Charles V. Zegeer, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

The purpose of this study was to evaluate Kentucky's adequacy-rating methods and procedures and to recommend improvements. The rating procedures used by planning engineers in the highway districts were found to be reliable and consistent. Kentucky's methods were found to be superior to methods used in most states, but several changes are recommended. Additions include credits for accident analysis for urban and rural sections, traffic control devices for urban areas, and traffic safety features for bridges. Skid resistance evaluation was changed from a subjective rating to a measured value. Points assigned to the various rating elements have been revised, and …

Accidents On Rural, Two-Lane Roads And Their Relation To Pavement Friction [Nov. 1976], Rolands L. Rizenbergs, James L. Burchett, Larry A. Warren

Kentucky Transportation Center Research Report

Friction measurements were made with a skid trailer at 40 mph (18 m/s) on 1460 miles (2350 km) of rural, two-lane roads (US routes) in Kentucky. Maintenance sections or subsections were treated as test sections. Accident experience, friction measurements, traffic volumes, and other available data were obtained for each. Various expressions of wet-pavement accidents and pavement friction were related and analyzed. Averaging methods were used in developing trends and minimizing scatter. A moving average for progressively-ordered sets of ten test sections and test sections grouped by Skid Numbers and Peak Slip Numbers yielded more definite results. The expression of accident …

Individualized Instructional Units For Estimating In The Construction Field, Robert P. Rosendahl

Graduate Research Papers

The purpose of this study was to investigate the development, production, and use of individualized instructional units for construction estimating for the purpose of incorporating a section on estimating into the construction technology course of the industrial arts program. These units should be equally valuable in seminars, workshops, and courses set up for construction personnel, engineers, retail lumber dealers, and university or technical students.

Report On Wastewater Disposal To Board Of County Commissioners, Clark County Nevada, Clair N. Sawyer

Publications (WR)

This report is concerned with the management of waste-waters and subsurface drainage from the City of Las Vegas and its environs and the BMI complex, all in Clark County, Nevada. The prime objective is to recommend a plan of action which will utilize the natural resources of the area in the least costly manner and still protect Lake Mead for recreational purposes and use as a public water supply, At this writing, conditions in the upper Las Vegas arm of Boulder Basin are quite unsatisfactory for some recreational purposes due to the extensive blooms of algae which develop. Experience at …

Air Pollution Control Training In Colleges And Universities: A Status Report For The United States And Canada, Harold M. Cota

Civil and Environmental Engineering

The APCA Education and Training Committee surveyed air pollution training at colleges and universities in the United States and Canada in 1975. There were 197 full-time faculty teaching air pollution courses at 75 schools. Graduates from these programs are finding meaningful work in both the public and private sector. Financial support is briefly discussed.

Ole Miss Engineer 1976

Ole Miss Engineer

No abstract provided.

Acoustic Emission, Fatigue, And Crack Propagation, Theodore Hopwood Ii

Kentucky Transportation Center Research Report

Acoustic emission was used in conjunction with tensile tests to evaluate the condition of structural steel specimens subject to various tensile fatigue lives. The results indicate that the acoustic emissions detected were the result of plastic deformation. There was no apparent relationship between fatigue history of the steel specimens and the amount of plastic deformation they can accommodate.

Further tests revealed that acoustic emission has the physical capability of detecting cracks on large structural steel members. This may prove beneficial for the comprehensive testing of steel bridges.

Non-Linear Finite Element Analysis Of Light Gage Steel Shear Diaphragms, Erdal Atrek, Arthur H. Nilson

CCFSS Library (1939 - present)

SUMMARY Shear diaphragm action of properly designed light gage steel panels used for floors, roofs, and walls in steel buildings increase the stiffness and strength of such buildings. Considerable savings in weight and cost can be realized if full account of this action is taken in design. To make good use of the diaphragm action, detailed knowledge on diaphragm response to loading is essential. An efficient computer program has been prepared to analyze light gage steel shear diaphragm behavior in the linear and nonlinear ranges of response, up to collapse. The program uses figinite element concepts for analysis, and has …

Development Of Warrants For Left-Turn Phasing, Kenneth R. Agent

Kentucky Transportation Center Research Report

Warrants for the installation of left-turn phasing were developed. A review of literature was conducted along with a survey of the policies of other states. Field data of delays and conflicts were taken before and after installation of exclusive left-turn signalization. Left-turn delay studies were conducted at intersections with varying volume conditions. Analysis of the effect on accidents of adding a left-turn phase was made. The relationship between left-turn accidents and conflicts was investigated. Other types of analysis concerning gap acceptance, computer simulation, capacity, and benefit-cost ratios were also performed.

It was found that exclusive left-turn phasing significantly reduced left-turn …

Kentucky Research: A Flexible Pavement Design And Management System, Herbert F. Southgate, Robert C. Deen, James H. Havens, William B. Drake

Kentucky Transportation Center Research Report

Various strategies for designing pavement structures are discussed. Initial full-life design, stage designs and planned extensions of service life, final design, surface renewals for deslicking, no-defect designs for high-type high-volume facilities, and allowable-defect designs are considered. Economics enter in terms of salvage value of existing pavements and alternate designs using different proportions of materials within the structure.

The elastic model represented in Chevron's n-layered computer program is the basis for theoretical relationships. Ranges of values are given for input variables such as Young's moduli, Poisson's ratio, thicknesses for layers, tire pressure, and load. The Kentucky CBR is related to modulus …

Cross Florida Barge Canal Restudy Report Summary, Department Of The Army Jacksonville District Corp Of Engineers

Waterways and wildlife

The objective of this study was to prepare a Restudy Report including an environmental assessment and analysis, engineering and cost studies, and updated economic studies on various alter natives for the Cross Florida Barge Canal Project. Detailed engineering, economics and environmental results are presented in separate documents and summarized herein. An environmental impact statement was prepared to accompany the Restudy Report. The basic framework for the studies was regional in scope and included baseline conditions as well as future conditions expected with and without the alternatives studied. Study area delineation was based upon the economic , social, and environmental systems …

Manufactured Solar Energy Units For Residential Heating, Michael W. Aubrey

Graduate Research Papers

This study is concerned with:

1. researching the principles and technologies of flat-plate solar collector panels, transfer and storage systems that are presently manufactured.

2, compiling an annotated bibliography of local manufacturers and distributors of solar energy units for residential heating.

3. developing a teaching unit on the practical application of these manufactured units to be used in a residential heating systems unit in a high school building construction class.

The Highest And Best Uses Of The Oklawaha River Basin And Lake Rousseau For The Economy And The Environment, Ronald M. North

Waterways and wildlife

The study is designed to assist citizens and officials in a democratic, public decision-making process regarding the best use of a National resource in a conflict situation in which competing objectives and goals are largely exclusive. A barge canal cannot be built without incurring social, economic and environmental benefits and costs. A wild and scenic river cannot be developed without incurring a different set of social, economic and environmental benefits and costs. Is there a balance or a point of convergence which can be reached? The alternatives presented will indicate. some of the significant measures of value for any choice, …