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Articles 49291 - 49320 of 52439
Full-Text Articles in Physical Sciences and Mathematics
Historical And Projected Municipal And Industrial Water Usage In Utah 1960-2020, Roger D. Hansen, Herbert H. Fullterton, A. Bruce Bishop, Trevor C. Hughes, Ronald Christensen, Davis S. Bowles, Kyle Matteson, Hershel G. Hester Iii, Ronald Mead, Randy Simmons
Historical And Projected Municipal And Industrial Water Usage In Utah 1960-2020, Roger D. Hansen, Herbert H. Fullterton, A. Bruce Bishop, Trevor C. Hughes, Ronald Christensen, Davis S. Bowles, Kyle Matteson, Hershel G. Hester Iii, Ronald Mead, Randy Simmons
Reports
This publication reports the results of a municipal and industrial water use inventory. Data reported covers the period 1960 through 1976. Time series information is aggregated from municipal and industrial system level to country and state totals. Total municipal and industrial withdrawals are divided between surface and groundwater sources. Yearly per capital withdrawal rates are estimated for 50 Utah municipalities and for each of Utah’s 29 counties. Per capita withdrawal rates range from a high of over 400 gallons per capita per day (gcd) in the communities of Delta, Fillmore, Hyrum, Logan, and Morgan to a low of 100 gcd …
Random Differential Equations In Water Quality Modeling, Brad A. Finney, David S. Bowles, Michael P. Windham
Random Differential Equations In Water Quality Modeling, Brad A. Finney, David S. Bowles, Michael P. Windham
Reports
A probabilistic river water quality model is developed with the capability of determinging the joint and marginal probability density function of biochemical oxygen demand (BOD) and dissolved oxygen (DO) at any point in a river. The one dimensional steady-state model can be applied to a river system with any reasonable number of point loads and diversions and lateral surface and subsurface inflow. The model can simultaneously consider randomness in the intital conditions, inputs, and coefficients of the water quality equations. Any empirical or known distribution can be used for the initial condition. The randomness in the water quality equation inputs …
Modeling The Performance Of The Intermittent Sand Filter, P. A. Cowan, E. J. Middlebrooks
Modeling The Performance Of The Intermittent Sand Filter, P. A. Cowan, E. J. Middlebrooks
Reports
Several models were developed to predict the efficiency of the intermittent sand filter (ISF) in removing algae from wastewater stabilization pond effluent; volatile suspended solids (VSS) was the analytical technique used to identify algal concentrations. The first (ISF model) and second (modified ISF model) models consisted of two distinct portions: a surface algal layer (SAL) component and a sand phase component. In the ISF model, the sand phase component was described in terms of 20 empirical sand filter efficiency terms (20 ^ coefficients); in the modified ISF model, a functional relationship between ^ and filter depth was developed. The modified …
Economic Feasibility Of Ethanol, Methanol And Alcohol-Gasoline Blends As Alternatives To Gasoline As Motor Fuels, Marjorie Diane Pettypool
Economic Feasibility Of Ethanol, Methanol And Alcohol-Gasoline Blends As Alternatives To Gasoline As Motor Fuels, Marjorie Diane Pettypool
Masters Theses
The major emphasis of this study is the economic feasibility of the use of alcohol-gasoline blends (gasohol) and alcohol fuels; but all major issues concerning the use of gasohol and alcohol fuels are explored. The specific objectives of the investigation include the determination of the specific performance properties of the fuels, their pollutant emissions (compared to gasoline), and their costs compared to gasoline.
While opponents to the use of alcohol fuels are more vocal than proponents, citing high cost and the lack of raw materials as objections, proponents believe new processes that can use any cellulose containing material as a …
The Distribution Of Cadmium, Chromium And Lead In Crabs, Clams And Oysters From Calcasieu Estuary, Louisiana, Fritz Jaenike
The Distribution Of Cadmium, Chromium And Lead In Crabs, Clams And Oysters From Calcasieu Estuary, Louisiana, Fritz Jaenike
Masters Theses
In November 1978, specimens of oysters (Crassostrea virginica), clams (Rangia cuneata), crabs (Callinectes sapidus) and water and sediment samples were collected from Calcasieu Estuary, Louisiana. The concentrations of cadmium, chromium and lead were determined in the samples with an inductively coupled argon plasma direct reading emission spectrophotometer. Crab claw muscle, gill and carapace tissues were analyzed separately. Oysters and clams were separated into shell and whole soft tissue samples which were analyzed separately. The concentration order of the metals in crab carapace and in oyster shells was similar to that of the sediments, (Pb …
Use Of Fishes And Macroinvertebrates In The Assessment Of Water Quality In An Illinois Stream Receiving Sewage Effluents, Robert George Mosher
Use Of Fishes And Macroinvertebrates In The Assessment Of Water Quality In An Illinois Stream Receiving Sewage Effluents, Robert George Mosher
Masters Theses
Kickapoo Creek is a medium sized, warm water stream located in the central part of Coles County, Illinois. The creek is the receiving stream for the sewage effluent of the cities of Mattoon and Charleston which recently began treating sewage to the tertiary level. In 1967-70, the fish population of the creek was intensively surveyed at a time when a less advanced method of sewage treatment was employed. This study provided a baseline of information from which a portion of the present study is founded.
Fish were collected from 5 sampling stations utilizing capture techniques comparable with those used in …
Analysis Of Lead In Freshwater Clams From The Embarrass River, Coles County, Illinois, Kwaku D. Nantwi
Analysis Of Lead In Freshwater Clams From The Embarrass River, Coles County, Illinois, Kwaku D. Nantwi
Masters Theses
Twenty-two freshwater clams of various genera were collected by hand from two sites on the Embarrass River located at 240 meters and 400 meters downstream from the dam at Lake Charleston and at depths of .4 and 2.5 meters. Ten grams of gill tissue from each clam was prepared by furnace ashing, dissolved in 30 ml. of acid mixture and analyzed for lead content using an atomic absorption spectrometer. The average lead concentration for the clams was 3.60 ppm, while that of the ambient water was 0.33 ppm indicating that these local bivalves show a lead biocentration of about ten …
Volume 2, Number 12 (December 1978), The Otec Liaison
Volume 2, Number 12 (December 1978), The Otec Liaison
The OTEC Liaison
No abstract provided.
The Prairie Naturalist Volume 10, Number 4. December 1978
The Prairie Naturalist Volume 10, Number 4. December 1978
The Prairie Naturalist
THE ORNITHOGEOGRAPHY OF THE GREAT PLAINS STATES ▪ Paul A. Johnsgard
CAPTURE OF GRAY PARTRIDGE BY FALCONRY IN NORTH DAKOTA ▪ John W. Schulz
INCUBATION RHYTHMS AND EGG TEMPERATURES OF AN AMERICAN GREEN-WINGED TEAL AND A RENESTING PINTAIL ▪ Alan D. Afton
TEMPORAL PATTERNS OF SPRING MIGRATION OF YELLOW-HEADED BLACKBIRDS IN NORTH DAKOTA ▪ Richard D. Crawford
CHECKLIST OF NORTH DAKOTA MAMMALS: COMMENTS ON STATUS AND DISTRIBUTION OF SPECIES ▪ Robert W. Seabloom
NOTE
First Nesting Record of Cattle Egret and Little Blue Heron in North Dakota ▪ Lloyd A. Jones
BOOK REVIEWS
Geese of the World ▪ Carl E. …
Emission Of Microbial Aerosols From Polluted Waters In Densely Populated Regions, Lois S. Cronholm
Emission Of Microbial Aerosols From Polluted Waters In Densely Populated Regions, Lois S. Cronholm
KWRRI Research Reports
The air surrounding three activated sludge tanks was sampled over a two year period for the emission of bacterial aerosols under a variety of climatic conditions and at varying distances upwind and downwind of the aerated tanks. All plants emitted species of enteric bacteria which are significant as index organisms and as frank pathogens. The emission pattern of these bacteria were influenced by distance from the plant and wind direction. Within the parameters of a plant, defined arbitrarily in this study by sampling sites less than 150 m upwind and less than 900 m downwind, distance from the source was …
Monroe, Utah,Hydrothermal System: Results From Drilling O F Test Wells Mc 1 And Mc 2, D. S. Chapman, Roger Harrison
Monroe, Utah,Hydrothermal System: Results From Drilling O F Test Wells Mc 1 And Mc 2, D. S. Chapman, Roger Harrison
All U.S. Government Documents (Utah Regional Depository)
Following detailed geological (Parry et al., 1976; Miller, 1976) and geophysical (Mase, Chapman, and Ward, 1978; Kilty, Mase, and Chapman, 1978) studies of the Monroe, Utah hydrothermal system, a program of drilling two intermediate depth test wells was undertaken. The objectives of the test well drilling were three-fold: (1) to obtain structural information bearing on the poorly know dip of the Sevier Fault, (2) to obtain temperature information below the shallow depths (approximately 300 ft.) sampled in the first phase of exploration, and (3) to provide cased wells during the production phase of the project. The test well drilling was …
Water Current, Volume 10, No. 6, November/December 1978
Water Current, Volume 10, No. 6, November/December 1978
Water Current Newsletter
From the Desk of the Director
Proposal Deadlines
Water Resources Seminar Series
FY 1979 Projects Underway
Water Resources in Nebraska
39 Water Research Grants Approved by OWRT
Discount Rate Set at 6 7/8%
Study on Energy Conservation in Irrigated Agriculture
Research Review: Impact of an Introduced Fish Species (Morone americana) on the Fisheries Resources of Nebraska
Volume 2, Number 11 (November 1978), The Otec Liaison
Volume 2, Number 11 (November 1978), The Otec Liaison
The OTEC Liaison
No abstract provided.
Distribution Of Phytoplankton In Nebraska Lakes, F. A. Morris, M. M. Morris, W. D. Taylor, L. R. Williams, S. C. Hern, V. W. Lambou
Distribution Of Phytoplankton In Nebraska Lakes, F. A. Morris, M. M. Morris, W. D. Taylor, L. R. Williams, S. C. Hern, V. W. Lambou
United States Environmental Protection Agency: Publications
The National Eutrophication Survey was initiated in 1972 in response to an Administration commitment to investigate the nationwide threat of accelerated eutrophication to freshwater lakes and reservoirs. The Survey was designed to develop, in conjunction with State environmental agencies, information on nutrient sources, concentrations, and impact on selected freshwater lakes as a basis for formulating comprehensive and coordinated national, regional, and State management practices relating to point source discharge reduction and nonpoint source pollution abatement in lake watershed.
The Survey collected physical, chemical, and biological data from 815 lakes and reservoirs throughout the contiguous United States. To date, the Survey …
A Limnological Study Of Ricks Pond And The Gulpha Creek Drainage In Garland County, Arkansas, Tom M. Buchanan, James Houston, Joe F. Nix, Richard L. Meyer, Eugene H. Schmitz
A Limnological Study Of Ricks Pond And The Gulpha Creek Drainage In Garland County, Arkansas, Tom M. Buchanan, James Houston, Joe F. Nix, Richard L. Meyer, Eugene H. Schmitz
Technical Reports
A limnological investigation of Ricks Pond and the Gulpha Creek drainage of Garland County, Arkansas was conducted between 1 June 1978, and 21 August 1978. Water samples taken from ten stations on three different dates indicated that the stream and pond systems were typical in water quality characteristics of other small, high gradient streams and impoundments in the Ouachita Mountains of Arkansas. In Ricks Pond, thermal stratification occurred along with the development of an oxygen deficient zone below a depth of one meter. Other water quality parameters indicated that Ricks Pond is a moderately productive ecosystem, with the productivity limited …
The Maine Coast : Issues Considered, Maine Coastal Program
The Maine Coast : Issues Considered, Maine Coastal Program
Maine Collection
The Maine Coast : Issues Considered - A Report to the Governor by his Advisory Committee on Coastal Development and Conservation
Maine Coastal Program, Maine State Planning Office
Augusta, Maine (31 October 1978)
Contents: Introduction / Summary of Committee Recommendations / Fisheries / Port Development / Heavy Industry Siting / Travel and Tourism / Cumulative Impact of Development / Natural Resource Information Transfer
The Effect Of Crude Oil Prices On The Output Composition Of Refined Petroleum Products, Angelos Pagoulatos, David L. Debertin, Emilio Pagoulatos
The Effect Of Crude Oil Prices On The Output Composition Of Refined Petroleum Products, Angelos Pagoulatos, David L. Debertin, Emilio Pagoulatos
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
In this study the crude petroleum market is linked to the market of refined petroleum products through a set of technological relationships. An econometric study is used to quantify the existing relevant variables. The price equations for each refined product are used to derive estimates of elasticities with respect to quantity supplied, price of domestic crude oil and price of imports.
Low Btu Producer Gas -- A Fuel Of The Past And A Fuel Of The Future, Lee Carter
Low Btu Producer Gas -- A Fuel Of The Past And A Fuel Of The Future, Lee Carter
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
A prime purpose of this paper is to give conscious emphasis to an important type of coal gasification, one that does not demand hundreds of millions of dollars to launch an experimental program but instead is essentially ready to use after a reasonable and straightforward engineering check-out of the local coal sources and the prospective gas demand.
That type of coal gasification results in low Btu producer gas. This paper deals with its history, its technology and its economics. In the light of that information, the future of low Btu producer gas in America then is assessed.
Effective Utilization Of Energy From Biomass Residues In Agricultural Applications, Harry W. Parker
Effective Utilization Of Energy From Biomass Residues In Agricultural Applications, Harry W. Parker
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
Biomass is one of the more attractive alternative energy sources. Use of existing biomass residues within the farm and ranch economy can be accomplished with a minimum of organizational problems since the producer, processor, and consumer may be the same person or organization. The major task is to provide potential agricultural biomass users with accurate cost estimates for the energy made available from the biomass, and contemporary technology for its utilization.
Specific examples are given with regard to powering irrigation well engines with cotton gin trash via a producer gas generator, and conversion of harvested mesquite wood to digestible energy …
Cost Accounting Regulations In Oil And Gas Industries, Lakshmi U. Tatikonda, Rao J. Tatikonda
Cost Accounting Regulations In Oil And Gas Industries, Lakshmi U. Tatikonda, Rao J. Tatikonda
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
The cost accounting methods that are currently used in the oil and gas Industry are very diverse. Since the 1973 Arab Oil Embargo, increased attention was given to this issue, which resulted in the issuance of SFAS-19 by the FA SB and the SEC’s attempt to develop a new accounting method based on the value of their reserves. The pros and cons of the existing methods are discussed. Also discussed is the need for a uniform accounting procedure.
Energy Substitution Prospects, Vaman Rao
Energy Substitution Prospects, Vaman Rao
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
Any discussion about the future pattern of energy use invariably includes scernarios involving a switch-over to that source of energy which is available in abundant supply. It is taken for granted, for example, that coal will play a major role in the future and that the relative share of oil will decline with the passage of time. It is too simplistic to assume that a time series analysis will give the likely clues as to the pattern of switch-over from one source of energy to another. There has been a radical change in the structure of exchange relations between the …
National And Regional Agricultural Impact Of Natural Gas Deregulation And Curtailment Under A High Export Scenario, Barton C. English, Earl O. Heady, Dan Dvoskin
National And Regional Agricultural Impact Of Natural Gas Deregulation And Curtailment Under A High Export Scenario, Barton C. English, Earl O. Heady, Dan Dvoskin
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
An interregional national linear program ring model is used to evaluate the national and regional inpacts cn agriculture of two alternative natural gas policies -- curtailment to irrigation and deregulation. Energy use, agricultural production, commodity shadow prices, and resource use under natural gas curtailment and deregulation are compared to a base nn without these policy changes.
Analysis Of Residential Electric Demand In Southwestern Indiana, Mangi L. Agarwal
Analysis Of Residential Electric Demand In Southwestern Indiana, Mangi L. Agarwal
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
This study analyzes the residential demand for electricity in the Southern Indiana Gas and Electric Company service area. It explores the many variables which may contribute to electricity consumption. It also attempts to synthesize various weather and climatic data into one variable called the "comfort index" which may explain part of the electricity consumption. In estimating the demand equations, monthly data for twelve years have been used.
Gasification Of Municipal Solid Waste In A Fluidized Bed Reactor, Craig W. Mosley, Radon Tolman
Gasification Of Municipal Solid Waste In A Fluidized Bed Reactor, Craig W. Mosley, Radon Tolman
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
Results of pilot plant municipal solid waste gasification studies conducted at the Adolph Coors Company, Golden, Colorado, are presented. The nominal one ton per hour, 150 psig, fluidized bed gasification system was operated during 1973- 1974 using steam and air as oxidants and fluidizing media. These studies show the feasibility of a one-stage, air blown, fluid bed MSW conversion system.
Burning Wood As A Supplement To Solid Waste, Andrew R. Banta, William P. Smith
Burning Wood As A Supplement To Solid Waste, Andrew R. Banta, William P. Smith
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
The University of Kansas at Lawrence uses natural gas and oil to generate steam for heating and other campus needs. The projected price increase of these fuels has led to a study of burning solid waste and wood. This study discusses the technical and economic considerations of burning wood. Topics included are sources and availability, collection and transportation, preparation and burning, and environmental effects. It is concluded that sufficient wood is available; truck transport is the only feasible option; drying some wood is desirable; and that the burning can be done separately or directly with the solid waste.
An Analysis Of Investments In Residential Energy Conservation In Southeast Missouri, Ralph Gunderson
An Analysis Of Investments In Residential Energy Conservation In Southeast Missouri, Ralph Gunderson
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
This study examines the economic feasibility of residential solar heating. Climatic and economic variables used in this report represent those of Cape Girardeau, Missouri. An annual cost model is used to determine the conditions under which solar heating achieves a reduced annual cost of heating relative to gas and electric heating systems.
Industrial Energy Conservation Through Boiler Operation Efficiency Improvement, Dupree Maples, G. D. Whitehouse
Industrial Energy Conservation Through Boiler Operation Efficiency Improvement, Dupree Maples, G. D. Whitehouse
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
A method of determining the minimum amount of oxygen in the flue gas which results in the most efficient combustion is discussed. Results of field test are presented. The magnitude of the stack gas losses is dependent on the stack gas composition determined by the fuel and quantity of excess air and the stack temperature.
Oil Shale Energy And The Environment, Stephen Utter
Oil Shale Energy And The Environment, Stephen Utter
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
Shale oil can be produced from oil shale by true In situ, modified in situ, and surface retorting methods. Both modified in situ and surface methods require mining of the oil shale. The environmental Implications of an oil shale mining industry are reviewed and the impacts upon land use, air and water quality, and ecological systems discussed. The Bureau's mining environmental research program is described and the results to date summarized.
New Concept In Louver Blade Design Reduces Energy Losses, Peggy Kitchen, R. David Moore
New Concept In Louver Blade Design Reduces Energy Losses, Peggy Kitchen, R. David Moore
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
A new louver blade design, developed through extensive wind tunnel tests, employs an airfoil shape with excellent aerodynamic characteristics. Stressed-skin construction adds strength and rigidity permitting the use of longer blades and the elimination of unnecessary frame sections. Lever arms and linkage rods are placed out of the airstream, further reducing resistance to airflow. Louvers and dampers employing this design will have a pressure drop of from 1/4 to 1/10 that of units of traditional design.
Fuel Gas From Wood Waste, V. K. Mathur, R. A. Caughey
Fuel Gas From Wood Waste, V. K. Mathur, R. A. Caughey
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
Design, construction and operation of a new type of gasifier for the production of fuel gas from wood waste (sawdust, chips, bark, etc.) are discussed. Data obtained from pilot plants are presented. The gasifier is inexpensive, easy to operate and has about 95% efficiency.