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Articles 19531 - 19560 of 19868
Full-Text Articles in Entire DC Network
Optimizing Resistance Coefficients For Large Bed Element Streams, D. E. Overton, Harl E. Judd, C. W. Johnson
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.
A National Survey Of Manpower Utilization And Future Needs Of Consulting Engineering Firms Engaged In Water Pollution Control, E. Joe Middlebrooks
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
Wastewater Treatment Plant Control, David Milton Knowles
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
A Proposed Approach To Protect Wastewater Biological Treatment Plants Against Toxic Contaminants, Joseph M. Phillips
Retrospective Theses and Dissertations
No abstract provided.
Remote Sensing Of Environmental Parameters, Wendell Princeton Perkins
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
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. …
Soil And Plant Analysis For Mineral Deficiencies, M D. Carroll
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.
Food Selectivity Of The Black Bullhead (Ictalurus Melas, Rafinesque) In Lake Poinsett, South Dakota, Andrew J. Repsys
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 …
Effects Of Diethylstilbestrol On Reproduction In The Black-Tailed Prairie Dog, Donald G. Pfeiffer
Effects Of Diethylstilbestrol On Reproduction In The Black-Tailed Prairie Dog, Donald G. Pfeiffer
Electronic Theses and Dissertations
Research was conducted in southwestern South Dakota in 1970 and 1971 to obtain information on the reproductive cycle of the black-tailed prairie dog (Cynomys ludovicianus) and to test effectiveness of diethylstilbestrol as a reproductive inhibitor. Embryo body lengths from 10 pregnant females were compared to body lengths of 14 known day-old young to learn the peak breeding period when an estrogenic chemosterilant would be most effective. Conception dates were obtained for three females by backdating the gestation period. The breeding peak was found to occur in late February and early March in South Dakota. Nine of 11 Prairie dogs were …
Water Resources News, Volume 4, No. 1, January 1972
Water Resources News, Volume 4, No. 1, January 1972
Water Current Newsletter
House Hearings on Water Pollution Control
New Publications Available from the NWRRI
Coastal Zone Management
Ground Water Pollution
Economic Disclocation from Pollution Control
EPA Regulations
Waste Treatment Plant Guidelines
WRC Policy on Revision of Regional and River Basin Plans
Water Resources Council Outlines New Principles and Standards
Experts Advise on EPA on Sewage Plant Construction
Pollution Prevention Guide for Cottage Owners
Desalting Plant for Orange County, California
US Is Accelerating Desalting Programs
Farm Cleanup is Hindered by EPA Bias for Sewage
Sources Sought
Toward An Energy Policy, Dean E. Abrahamson
Toward An Energy Policy, Dean E. Abrahamson
Journal of the Minnesota Academy of Science
The lack of a national policy on fuels and energy at a time of concern about the future supply and demand for energy and the environmental effects of creating energy is examined. Alternatives to present practices in generating and utilizing power are considered along with suggestions for measuring the "energy cost" of technological progress.
A Water Quality Survey, Dale E. Mcmichael
A Water Quality Survey, Dale E. Mcmichael
Journal of the Minnesota Academy of Science
Representative factors influencing water quality in the Albert Lea, Minnesota area were chosen as to assess water quality and changes in the watershed which has been described as an earlier valley of the Shell Rock River.
Parameters representative of chemical, bacterial, and thermal pollution were, respectively, total phosphorous, total and fecal coliform counts, and temperature. Statistical analysis has revealed that significant differences in some parameters measured do exist when various sampling stations of a given sampling date are compared. Statistical analysis also has indicated that correlations do exist between fluctuation patterns when all sampling stations of a given sampling date …
Interactions Of Pesticides And Phytoplankton, Pamela H. Philyaw
Interactions Of Pesticides And Phytoplankton, Pamela H. Philyaw
Retrospective Theses and Dissertations
No abstract provided.
An Investigation Of Methods For Reuse Of Rubber Tires, Charles Edward Armbruster
An Investigation Of Methods For Reuse Of Rubber Tires, Charles Edward Armbruster
Retrospective Theses and Dissertations
Methods of reusing/recycling the more than 250 million automobile and truck tires which are worn out each year were investigated. The existing methods of reusing tires account for about 30 percent of the volume of scrap tires generated each year. These methods are, Retreading, Reclaiming (by reducing to ground up rubber and fiber), and Tire Splitting (stamp items out of sidewall and tread areas). Several possibilities for reusing/recycling the unused 70 percent were discovered. These methods are as follows: Destructive Distillation -- a method of recovering chemicals from tires by pyrolitic action. It is anticipated that eventually as much as …
Plant Cover For Bare And Salt Affected Land, Department Of Agriculture, Western Australia
Plant Cover For Bare And Salt Affected Land, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
The contributions made by this State to land reclamation were recognised at an international level last year.
Mr. C. V. Malcolm, a research officer with the Soils Division, presented a paper entitled "Establishing Shrubs in Saline Environments" at a symposium on Useful Wildland Shrubs, Their Biology and Utilisation, at Utah State University, Logan, Utah.
The conclusion to Mr. Malcolm's review, set out below, summarises much of what is known about shrub establishment in saline areas.
Agriculture And Pollution In Western Australia. Part 2. Pollution Problems In W.A, C V. Malcolm
Agriculture And Pollution In Western Australia. Part 2. Pollution Problems In W.A, C V. Malcolm
Journal of the Department of Agriculture, Western Australia, Series 4
In Part I pollution was defined as a reduction in the usefulness of a resource and its significance in relation to resource fragility was discussed. Pollution problems in Western Australia are here considered in broad geographical regions with further subdivision into pollution types.
A Feasibility Study Of Commercial Upland Game Bird Farms In Waterloo County, Ontario, Robert John Mcclure
A Feasibility Study Of Commercial Upland Game Bird Farms In Waterloo County, Ontario, Robert John Mcclure
Theses and Dissertations (Comprehensive)
No abstract provided.
The Prairie Naturalist Vol. 3, Nos. 3 And 4. September-December, 1971
The Prairie Naturalist Vol. 3, Nos. 3 And 4. September-December, 1971
The Prairie Naturalist
EDITORIAL: Badlands-Old and New ▪ Paul B. Kannowski
SEASONAL INVESTIGATIONS OF ALGAE FROM DEVILS LAKE, NORTH DAKOTA ▪ Richard Verch and Dean W. Blinn
THE VASCULAR FLORA OF PEMBINA COUNTY, NORTH DAKOTA ▪ Rays E. Willenbring and William T. Barker
LET'S EAT WILD ▪ Alan M. Cvancara
SURF SCOTER IN NORTH DAKOTA ▪ Harold A. Kantrud
SNOW GOOSE-CANADA GOOSE HYBRIDS ▪ David C. McGlauchlin
NOTES
Cowbird parasitism of an upland plover nest ▪ Kenneth F. Higgins
Birds sighted within one hour from one observation point in Burleigh County, North Dakota ▪ William A. Buresh
Golden-winged warbler in Burleigh County, North …
Response Of Fraxinus Pennsylvanica M. Provenances To Daylength And Temperature, Cheng-Chun Ying
Response Of Fraxinus Pennsylvanica M. Provenances To Daylength And Temperature, Cheng-Chun Ying
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Survival Of Some Freshwater Fishes In The Alkaline Eutrophic Waters Of Nebraska, D. B. Mccarraher
Survival Of Some Freshwater Fishes In The Alkaline Eutrophic Waters Of Nebraska, D. B. Mccarraher
Nebraska Game and Parks Commission: Staff Research Publications
Of 14 species of freshwater fishes held in cages in one or more of 13 alkaline lakes and ponds in Nebraska, few species survived more than a month where carbonate alkalinity, mostly as compounds of Na2C03 and KC03, was above 300 mg/liter. Of the 14 species tested, Sacramento perch (Archoplites interruptus), fathead minnow (Pimephales promelas), northern pike (Esox lucius), and the black bullhead (lctalurus melas), were the most tolerant of alkaline environments. Most centrachid fishes except A. interruptusand the green sunfish (Lepomis cyanel!us), did …
L.A. General Data, Walter A. Lawrance
Water Resources News, Volume 3, No. 8, October 1971
Water Resources News, Volume 3, No. 8, October 1971
Water Current Newsletter
WRC Report on Sharing Financial Responsibility of Water Development
Ground-water Quality Simulator
Environmental Impact Evaluation System Proposed
Industry-Government Oil Spill Conference Slated for 1973
National Urban Water Resources Research Program Report Published
River Development to Aid Rural Areas Should be "National Goal"
Water Circulation in San Francisco Bay Described
Discount Rate Raised to 5 3/8 Percent
Cornell Agricultural Waste Conference
Lawsuit Challenges Tennessee -- Tombigbee Waterwater
Corps of Engineers and Public Involvement
Sevier River Basin Floods 1852-1967, United States Department Of Agriculture, Economic Research Service, Forest Service, Soil Conservation Service
Sevier River Basin Floods 1852-1967, United States Department Of Agriculture, Economic Research Service, Forest Service, Soil Conservation Service
Elusive Documents
This chronology of Sevier River Basin floods extends from 1852 to
1967. Most common and destructive are dry mantle floods, which flow as
a muddy mortar-like substance containing 40 to 55 percent water. Hundreds
of tons of protective topsoil are removed from watershed lands,
debris and boulders are picked up as the flow travels down steep stream
channel gradients, and then the flood is debouched into communities and
on to productive cropland.
Unsteady Flow Toward Partially Penetrating Artesian Wells, Y. H. Huang
Unsteady Flow Toward Partially Penetrating Artesian Wells, Y. H. Huang
KWRRI Research Reports
A numerical method programmed for a high-speed computer was developed for determining the drawdown around an artesian well. A salient feature of the program is that it can be used for both fully and partially penetrating wells in either infinite or finite aquifers. The method Involves the application of finite difference equations to the well-known heat equation using a graded network. A comparison of the finite difference solutions with those obtained from the close-form formulas of Muskat, Theis, and Hantush indicates the validity of the method. A comparison between the finite difference solutions and the drawdowns measured on a sand …
The Prairie Naturalist Volume 3, No.2. June, 1971
The Prairie Naturalist Volume 3, No.2. June, 1971
The Prairie Naturalist
EDITORIAL: Environmental Rights ▪ Paul B. Kannowski
RIVER BASINS PLANNING ▪ H. A. Hendrickson
WATER RESOURCE PLANNING GONE AMUCK ▪ Charles H. Stoddard
THE INTERACTION OF CITIZENS' GROUPS AND GOVERNMENT AGENCIES WITH RESPECT TO ENVIRONMENTAL PROBLEMS ▪ Robert L. Burgess
WORDS AND MEANINGS ▪ Paul T. Crary
ENFORCEMENT OF NORTH DAKOTA ENVIRONMENTAL LAWS AND REGULATIONS ▪ Robert E. Beck
BIRDS OBSERVED IN NORTH DAKOTA DURING THE WINTER OF 1970-71 ▪ John T. Lokemoen and Paul E. Springer
STATUS OF CLARK'S NUTCRACKER IN NORTH DAKOTA ▪ Lewis W. Oring and Robert W. Seabloom
WINGED ANTS AS FISH FOOD ▪ Charles H. …
The Impact On The Navy Of Public Concern With Control Of Pollution Of The Seas By Oil, Robert Augustus Fisher
The Impact On The Navy Of Public Concern With Control Of Pollution Of The Seas By Oil, Robert Augustus Fisher
Marine Affairs Theses and Major Papers
It is difficult at best to evaluate the biological and chemical damages of oil pollution, but the physical effects are graphically evident in the blackened beaches and coastlines around the world and in the floating "tar-balls" found in mid-ocean. It is this dramatically visible effect that has stirred public concern. Thus, prevention of such damage is high on the list of priorities for both national and international concern. In the face of the ever increasing potential for pollution, President Nixon has pledged that federal agencies will take the lead in pollution abatement programs.
The Gonads Of The South American Dolphins, Inia Geoffrensis, Pontoporia Blainvillei, And Sotalia Fluviatilis, Richard J. Harrison, Robert L. Brownell Jr.
The Gonads Of The South American Dolphins, Inia Geoffrensis, Pontoporia Blainvillei, And Sotalia Fluviatilis, Richard J. Harrison, Robert L. Brownell Jr.
United States Department of Commerce: Staff Publications
The appearances of the gonads are described in males and females of 18 Inia geoffrensis, 11 Pontoporia blainvillei, and eight Sotalia fluviatilis from South America. Males of I. geoffrensis become sexually active at a length of about 228 centimeters, females at 175 to 180 centimeters. Length at birth is 76 to 80 centimeters; parturition occurs from about July to September in the upper Amazon. Males of P. blainvillei are still sexually immature at a length of 128.5 centimeters, females become sexually active at a length of 137 centimeters. Off Uruguay, pregnant females have fetuses 6 centimeters in length …
Ua77/1 Western Alumnus, Vol. 39, No 5, Wku Alumni Association
Ua77/1 Western Alumnus, Vol. 39, No 5, Wku Alumni Association
WKU Administration Documents
WKU alumni magazine. Features the following articles:
- What's Going On In Teacher Education? - Tate Page Hall
- Conway, Sheila. Faithful Servant of Generations - Shirley Posey
- Cravens, Raymond. Western & the Accreditation Process
- The Educational World: Where Does Western Stand?
- Photo Feature: Downing University Center
- Armstrong, Don. The Environment & Cornfield Calculus - Marvin Russell
- Service Lives On at Western - Alpha Phi Omega, Gamma Sigma Sigma, Gamma Beta Phi, Circle K
- Wilder, Jerry. Undergraduate Advisement: They Shall Not Fail!
- Downing, Dero. Founder's Day Meditation
- Cochran, Robert. What Do We Mean by School Public Relations?
- Given, Ed. Hitch-Hiker on Football's …
Water Resources News, Volume 3, No. 4, April 1971
Water Resources News, Volume 3, No. 4, April 1971
Water Current Newsletter
Deadlines for Filing Research Proposals for FY 1973
Federal Conference on Public Involvement
Department of Natural Resources to Eliminate Duplication and Rivalry
Hydrologic Information Storage and Retrieval System
Drinking Water Bills Introduced
Congressional Committee Assignments
Administration Reorganization Affects Corps' Functions
Water Resources News, Volume 3, No. 3, March 1971
Water Resources News, Volume 3, No. 3, March 1971
Water Current Newsletter
Office of Water Resources Research Issues Sixth Annual Report
Symposium on Statistical Hydrology
Guide for Instructing Teenagers on Environmental Protection
Salmon Return to Once-Polluted Stream
Water Bank Act of 1970
Nebraska Section of American Water Resources Association Formed
Report to the Congress on Industrial Water Pollution
Environmental Programs Get Significant Budget Increases
New National Environmental Laboratory Proposed
Muske Hearings to Reshape Water Pollution Legislation
Senate Hearing on Agricultural Pollution Set for Kansas City, April 2.
Professor Fox Cites Use of Water Programs to "Influence Pattern of Land Use in Urbanizing Regions"
New Water Guidelines Still in Air