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Limitations Of Some Finite Difference Methods In Solving The Strongly Nonlinear Equation Of Unsaturated Flow In Soils, Roland W. Jeppson

Reports

No abstract provided.

Relationships Of Infiltration Characteristics To Parameters Describing The Hydraulic Properties Of Soils, Roland W. Jeppson

Reports

No abstract provided.

Optimizing Resistance Coefficients For Large Bed Element Streams, D. E. Overton, Harl E. Judd, C. W. Johnson

Reports

This is a report of a comparison of Darcy resistance coefficients calculafed for previously reported laboratory data and those calculated for large bed element streams. Large bed element (LBE) streams exist frequently in nature where rocks derived from valley walls or from channels cutting through ancient glacial or fluvial deposits are moved only under conditions of extreme flood. The height of bed elements is a significant part of the mean depth of flow. The stream gradients are high and are quite stable for all but the highest flows.

Effects Of Land Use On Water Quality: Summit Creek, Smithfield, Utah, David W. Meyers, E. Joe Middlebrooks, Donald B. Porcella

Reports

The effects of various land uses on water quality in Summit Creek were evaluated during the period beginning March 13, 1971, and ending October 27, 1971. Potential sources of pollution investigated where: (1) septic tank use, (2) feedlot runoff, (3) urban runoff, (4) rural runoff. Samples were collected from five sampling stations on 16 separate days during the sampling period. Analyses were performed to determine the following constituents: ammonia, nitrite, nitrate, total phosphorus, orthophosphate, coliform bacteria, chloride, suspended solids, volatile suspended solids, total carbon, organic carbon, temperature, and pH. Agricultural activates, including livestock feedlot operations, were identified as the major …

A National Survey Of Manpower Utilization And Future Needs Of Consulting Engineering Firms Engaged In Water Pollution Control, E. Joe Middlebrooks

Reports

Introduction: As part of the overall evaluation of manpower needs in the environmental field, a survey of architectural and engineering firms was jointly sponsored by the Consulting Engineers Council, the American Association of Professors in Sanitary Engineering and the Environmental Protection Agency. A questionnaire was mailed to 8,.5. engineering and architectural firms that subscribe to the magazine

Development Of Regional Supply Functions And A Least-Cost Model For Allocating Water Resources In Utah: A Parametric Linear Programming Approach, Alton B. King, Jay C. Andersen, Calvin G. Clyde, Daniel H. Hoggan

Reports

The development and allocation of the water resourcse within a state require water planners to prepare plans far in advance of the actual time new facilities are required. It is not easy to identify and evaluate all the possible alternatives for providing water which incorporate broad objectives such as economic efficiency, social welfare, regional development, recreation benefits, and conservation of environment. Water resources development entails the modification of a natural hydrologic system to better meet man's needs. The interrelationships among elements of the hydrologic system to better meet man's needs. The interrelationships among elements of the hydrologic system are relatively …

Wastewater Treatment Plant Control, David Milton Knowles

Retrospective Theses and Dissertations

This report is the result of investigation of the feasibility of increasing the use of autamatic controls at the Florida Technological University Wastewater Treatment Plant. This investigation was to include a literature search and visits to wastewater treatment plants. During the writers course of study, he was privileged to make a series of tests of a residual chlorine analyzer which was made in the school shop. Since this work was closely related to automatic controls the data are included in this report.

A Proposed Approach To Protect Wastewater Biological Treatment Plants Against Toxic Contaminants, Joseph M. Phillips

Retrospective Theses and Dissertations

No abstract provided.

Solid Waste Management At Florida Technological University, Robert F. Hever

Retrospective Theses and Dissertations

This paper is a report on a study of the management of solid wastes at Florida Technological University (FTU). This study endeavors to provide a basis for effective planning for disposal of FTU's solid wastes, both in the next few years and at the time of maximum FTU population. Essentially, the study affirms that the present system of refuse collection by a private contractor is the best method of disposal, with the possibility that recycling of mixed paper may become feasible at some future time.

Remote Sensing Of Environmental Parameters, Wendell Princeton Perkins

Retrospective Theses and Dissertations

Atmospheric pollution in some degree has been around since time began. In recent times it has reached levels in some areas which proved to be harmful to man's health. A brief history review of these occurrences is presented. Laws have been enacted to combat this threat. A brief review of these laws is presented. Instruments for remote sensing of polluting sources are being developed to monitor ambient air quality and aid in enforcing these laws. A review of the techniques employed and the present state of the art is explored. Available instruments are presented in section III-5.

Localized Wastewater Treatment Facilities, Robert Russell Garrett

Retrospective Theses and Dissertations

The report describes an alternative to the use of septic tanks for invidual dwellings. The major problems confronting the larger wastewater treatment plants (0.012 to 10 million gallons per day) in central Florida are also discussed. Solutions in this report are for individual and multi-unit dwelling treatment systems (to 0.06 MGD). these units can provide 90% biochemical oxygen demand (BOD) and suspended solids (SS) removal in accord with new state and county regulations. A comparison of the large versus the small plants reveals that small innovative plants, though more expensive, are more environmentally sound than the poorly operated large facilities. …

Research Into Modular Construction, Richard L. Tash

Retrospective Theses and Dissertations

No abstract provided.

Conversion And Validation Of Sigart Program, A Progressive Traffic Signal Lights System Computer Model, Dennis F. Troyan

Retrospective Theses and Dissertations

The purpose of this research paper was to translate a Computer Model (SIGART), capable of simulating a progressive traffic signal lights system, from Burroughs B5500 FORTRAN II to the IBM 360 FORTRAN IV computer language, to outline the program algorithm, to set up detailed program documentation and to validate this model by applying practical system data. Expansion of the SIGART program by addition of an option to produce a time space plot of the output data utilizing a Calcomp plotter was also to be considered.

The Heat Treatment Of Soil By Microwaves To Control Pathogenic Parasitic Fungi, Dean Franklin Rich

Retrospective Theses and Dissertations

No abstract provided.

An Investigation Of Thermal Energy Potential In Florida Lakes As A Power Source To Arrest Conditions Of Oxygen Deficiency, John. Jackson

Retrospective Theses and Dissertations

No abstract provided.

Electrostatic Precipitation, Robert C. Hinsey

Retrospective Theses and Dissertations

No abstract provided.

Sinkholes In Florida And Their Effect On Man's Environment, Gregory Jackson Skinner

Retrospective Theses and Dissertations

The primary reason for making the research study on "Sinkholes in Florida and Their Effect on Man's Environment", is an interest in learning more about this somewhat unique phenomenon and how it is likely to affect man in the future, particularly here in Central Florida. This is significant at this time in view of the large number of existing sinkholes, the frequency of occurrence, the projected population and economic growth, and the possible impact this growth may have on future sinkhole occurrences. The research concentrated on possible causes, effects, frequencies, locations and mean of predicting future sinkhole development. There is …

Survey Of Instrumentation For Air Quality Surveillance, John Bowling

Retrospective Theses and Dissertations

No abstract provided.

A Mathematical Model For Determining The Thermal Distribution Resulting From Discharge Of A Heated Effluent, Alan H. Epstein

Retrospective Theses and Dissertations

A mathematical model is presented for the problem of determining the two-dimensional temperature distribution resulting from the discharge of a heated effluent into a shallow, quiescent receptacle. The physical model of the problem is the two-dimensional jet augmented by an imposed condition of viscous drag due to bottom friction effects. By virtue of the assumption that the physical properties of the effluent are independent of temperature over the operational temperature range of the plume, the analysis separates the total problem into a flow problem and a temperature problem. Solution of the temperature distribution is accomplished both analytically and numerically. Analytically, …

Suppression Of Turbofan And Turbojet Engine Generated Noise, Harry David Master

Retrospective Theses and Dissertations

Every advance in the transformation of heat energy into mechanical energy has involved a noise problem, and in general it increases with the power production. The jet airplane is a good example: the large-scale turbulence of the exhaust gases in the jet forms an unusually intense source of sound the control of which is quite difficult. The additionally generated fan noises add characteristic fan tones which are particularly noticeable on landing approaches. the human ear is the vulnerable receiver of these noises, and the problem becomes one of deciding how much jet engine noise reduction is required for the comfort …

Soil And Plant Analysis For Mineral Deficiencies, M D. Carroll

Journal of the Department of Agriculture, Western Australia, Series 4

Soil and plant analysis (testing) has its supporters and its critics. Some of the differences are resolved if the distinction is made between the concept and the practice. Most people would agree with the concept of soil and plant analysis but the practice, or service offered, in any agricultural situation can be subject to valid criticism.

This article defines some of the principles involved and illustrates some of the problems, to provide a better understanding of the usefulness and the limitations of soil and plant analysis as a diagnostic aid in plant and animal nutrition.

Use Of Waterfowl Production Areas By Ducks And Coots In Eastern South Dakota, Spencer Vaa

Electronic Theses and Dissertations

The use of Waterfowl Production Areas (WPA) by American coots (Fulica americana) and ducks was studied during 1970 and 1971 in east-central South Dakota The Eriksrud WPA, a type IV wetland with 55 acres of water area and 35 acres of upland, contained 188 coot nests during the 2-year study. Of the 188 coot nests, 178 hatched for a success rate of 95 percent. Average clutch size of 130 completed clutches was 8.4. Average size of 21 coot broods from 4 to 6 weeks of age was 6.1. Coot production on the Eriksrud area was estimated at 543 young per …

Development Of Techniques For Distribution Of Baits To Raccoon For Chemosterilant Studies, Richard L. Nelson

Electronic Theses and Dissertations

Sudan Red IV, Sudan Black B, and demethylchlortetracycline (DMCT) were tested as physiological markers in baits for raccoon (Procyon lotor). DMCT was readily detected in the jawbone of raccoons given 50 mg when examined under an ultraviolet light at period of 7, 30, 75, and 450 days following treatment. Seven days after administering 75 mg of Sudan Red IV, it could not be detected in fat deposits. Sudan Black B, administered in similar dosage, could not be detected at 30 days. A total of 1826 chicken eggs containing 50 mg DMCT was distributed on a 25 square-mile study area between …

Food Selectivity Of The Black Bullhead (Ictalurus Melas, Rafinesque) In Lake Poinsett, South Dakota, Andrew J. Repsys

Electronic Theses and Dissertations

The food habits of young-of-the-year, subadult and adult black bullheads were studied in Lake Poinsett, South Dakota, from March, 1970, to April, 1971. Two hundred twenty young-of-the-year (37-87 mm total length) fed primarily on limnetic cladocerans and copepods. Leptodora and Diaphanosoma comprised 86.5% of the total food volume. Chironomid larvae and pupae made up 5.6% of the total. Other benthic organisms and littoral cladocerans together contributed less than 1%. Stomach contents of 608 subadult and adult black bullhead (143-304 mm total length) indicated significant seasonal vairaiton in diet. Daphnia pulex and chronomid larvae were important food items in winter. Bullheads …

Influence Of Weather On Movement And Habitat Use Of Hen Pheasants During Brood Rearing, James M. Ruth

Electronic Theses and Dissertations

Pheasants survive in a wide range of yearly weather extremes but can be limited by certain short-term weather factors (Graham and Hosterburg 1948). Study of short-term weather conditions can therefore be important in understanding pheasant survival. Many studies have been done on yearly and seasonal effects of weather on pheasant production and survival. Bemitt and Terril (1940) reported on possible temperature factors in pheasant management in the north central area of the United States. Effects of weather on pheasant reproduction were studied by Buss and Swanson (1950) and Kozieky et al. (1955). MacKullan and Eherhardt (1953) studied the tolerance of …

Food Habits Of Fish In A Multispecies Farm Pond, Thomas W. Gengerke

Electronic Theses and Dissertations

Food habits of yellow perch, bluegill, and black crappie were studied during 1970 and 1971 in Abbey Pond, South Dakota. Aquatic insects, zooplankton, mollusks, and fish were the most frequently consumed food items by the three species. Yellow perch led primarily on aquatic insects, zooplankton, and mollusks. Aquatic insects were dominant (by volume) in 40.0 and 61.5 percent of the samples respectively for the two years. Zooplankton, mollusks, aquatic insects, and bryozoans were the dominant food items by volume of adult bluegills. On an annual basis aquatic insects were the most important food item in the diet. Adult black crappies …

Waterfowl Production In The James River Valley Of South Dakota, William E. Wheeler

Electronic Theses and Dissertations

A study of waterfowl production was conducted on two study areas in the James River Valley of South Dakota in 1971 and 1972. Its objectives were to measure rates of reproductive success and to determine the effect of land use and other influences on duck production. The five most abundant species of nesting ducks were blue-winged teal (Anas discors), mallard (platyrhvnchos), gadwall (A. strepera), shoveler (clypeata), and pintail (acuta). Seventy-two percent of the wetland habitat on the study areas consisted of temporary (Type l and Type 3) water areas. Only 3.9 percent of the wetlands represented semi-permanent (Type 4) and …

Determination Of Trace Elements In Water Utilizaing Atomic Absorption Spectroscopy Measurement, Gary D. Christian, J. Preston Miles Iii, Ronald Sensmeier, Melvin Sensmeier, Loraine Craig, Lynn Phibrick, Sudarshan Lal

KWRRI Research Reports

A variety of flameless atomic absorption methods have been investigated for the possible determination of trace elements in water. The general applicability of each technique was determined and where applicable, procedures have been developed for the determination of trace elements in natural waters.

Metals were preconcentrated by electrodeposition on a wire. The metals were then atomized for atomic absorption measurement by resistive heating of the wire. As little as 0.01 part per million (ppm) of mercury could be determined in this way.

A mercury cold vapor cell was constructed in which the sample is treated with a reducing agent to …

Degradation Of Riparian Leaves And The Recycling Of Nutrients In A Stream Ecosystem, Louis A. Krumholz, Roger G. Lambert, Charles R. Liston, Harry H. Woodward

KWRRI Research Reports

Leaves collected at 4 stations in the upper 5 km of Doe Run, Meade County, Kentucky, indicated an annual accumulation within the stream of 354 g/m²/year (17,700 kg). Leaves of sycamore (23.6%), red oak (21.7%), sugar maple (9.7%), beech (9.6%), white oak (7.1%), and hickory (6.0%) trees were most abundant, and leaves from 14 other kinds made up the remaining 22.3%. About a third of the annual leaf fall occurred during the last half of October and about two-thirds in the last 3 months of the year.

Calorific equivalents for different kinds of leaves ranged from 3,789 cal/g …

Factors Regulating The Growth Of Algae In Continuous Culture In Diluted Secondary Sewage Treatment Plant Effluent And Subsequent Biodegradability, Edward G. Foree, Caroline P. Wade

KWRRI Research Reports

Heterogeneous algal cultures were grown in laboratory continuous culture in continuous flow, completely mixed chemostats in secondary sewage treatment plant effluent diluted to give an ammonia nitrogen concentration of 10 mg/1. Variables were lighting, pH, carbon dioxide availability, and hydraulic residence time.

Optimum growth occurred under pH 7.0, excess CO₂, and continuous lighting conditions. The availability of artificially supplied excess CO₂ greatly increased the mass (standing crop) at steady-state over that produced under otherwise identical conditions for all residence times studied. For the case of excess CO₂ availability, the nitrogen concentration in the algal cells regulated …