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Articles 29341 - 29370 of 30786
Full-Text Articles in Entire DC Network
Disposal Alternatives For Intermittent Sand Filter Scrapings Utilization And Sand Recovery, Jerry T. Elliott, Daniel S. Filip, James H. Reynolds
Disposal Alternatives For Intermittent Sand Filter Scrapings Utilization And Sand Recovery, Jerry T. Elliott, Daniel S. Filip, James H. Reynolds
Reports
A three phase study is used to develop disposal alternatives and cost analysis for algae laden sand scrapings removed from intermittent sand filters used to polish wastewater lagoon effluent. Phase I, Irrigation Technique, explores the feasibility of supplying sufficient water to sand scrapings to leach out entrapped material. Details of removal with amount of water applied are presented. Phase II, Soil Application, tests with lysimeters soil response to application of the algae laden sand material. Physical and chemical parameters are not markedly altered where algae laden sand is applied to the soil surface. Phase III, Plant Bioassays, grew tall fescue …
Evaluation Of The Addition Of Granular Media Filtration To Wastewater Treatment Plants To Meet New Standards, Madhusudan M. Dawda, M. L. Davidson, E. J. Middlebrooks
Evaluation Of The Addition Of Granular Media Filtration To Wastewater Treatment Plants To Meet New Standards, Madhusudan M. Dawda, M. L. Davidson, E. J. Middlebrooks
Reports
A dual media filtration study was carried out at the central Weber Wastewater Treatment Plant in Ogden, Utah, to evaluate its feasibility as a tertiary treatment to meet new effluent quality standards. A review of the literature indicated that dual media filters were more efficient than conventional single media sand filters because of the “in depth” filtration achieved by dual media filters. An experimental filter was operated at four different hydraulic loading rates, ranging from 3 to 6 gpm/ft 2 (122.10 to 244.20 1/min/m2), to evaluate its effects on effluent quality. Hydraulic loading rate was shown not to affect suspended …
Iron Dynamics In A Gas-Water-Sediment Microcosm, Peter A. Cowan, V. Dean Adams, Donald B. Porcella
Iron Dynamics In A Gas-Water-Sediment Microcosm, Peter A. Cowan, V. Dean Adams, Donald B. Porcella
Reports
Iron dynamics in eutrophic systems were studied in the laboratory utilizing gas-water-Sediment phase sealed microcosms. Sediments from Hyrum Reservoir (2.4 percent iron by weight) were placed in the dark to simulate the hypolimnetic regions of a eutrophic impoundment. Iron both chemically and physically was readily available to microorganisms of the aqueous phase because iron in these systems was soluble. In the light microcosms, which simulated shallow littoral regions of eutrophic impoundments, iron was found in higher aqueous phase concentrations than was predicted chemically and physically; this was rationalized through biological mechanisms. The experiment was conducted in two phases: Phase I …
An Analysis Of Conservation Authority Decision Making As To The Acquisition And Development Of Open Space Resources, James C. Johnston
An Analysis Of Conservation Authority Decision Making As To The Acquisition And Development Of Open Space Resources, James C. Johnston
Theses and Dissertations (Comprehensive)
No abstract provided.
Geophysical Institute Annual Report 1975-76, Geophysical Institute
Geophysical Institute Annual Report 1975-76, Geophysical Institute
GI Reports
The 1975-76 Geophysical Institute Annual Report presents an overview of the year’s scientific research achievements across the Institute’s disciplines, alongside operational summaries covering finances, administrative changes, and other key activities.
Energy - Minerals - Environment: How Now Brown Cow?, Bobby G. Wixson
Energy - Minerals - Environment: How Now Brown Cow?, Bobby G. Wixson
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
Energy, technical, social, political, economic, and environmental problems are all people related problems which will continue to increase along with the world's population. With the growing demands for more energy and minerals along with the constraints of protecting the environment, new approaches must be considered to these complex problems.
Energy sources, modifications, alternatives, and new developments must be considered for the present as short term resources (next 25- 30 years) and in the future as long range research necessary to develop and implement new technology (25 years on). Major energy sources and their environmental considerations are generally classified as:
I. …
Bird Control, George C. Halazon
Bird Control, George C. Halazon
Great Plains Wildlife Damage Control Workshop Proceedings
We did a little work with pigeon sterilants six years ago. We didn't really have too much luck on bird control on pigeons because of the life of the pigeon. In other words we couldn't do it fast enough to satisfy the public because of the relatively large numbers of years required before the bird dies.
Progress In Coyote Hunting Depredations Research, Samuel B. Linhart
Progress In Coyote Hunting Depredations Research, Samuel B. Linhart
Great Plains Wildlife Damage Control Workshop Proceedings
Coyote depredations control research from the end of World War II to about 1960 was characterized by low levels of funding, a minimum of research facilities, an emphasis on lethal agents, few legislative restrictions, a lack of public interest, and little concern for the environment. Establishment of the Leopold Committee (1964) and Cain Committee (1971) were evidence of a growing public concern and awareness of the coyote-livestock problem.
Commensal Rodent Damage Control, Robert L. Carlton
Commensal Rodent Damage Control, Robert L. Carlton
Great Plains Wildlife Damage Control Workshop Proceedings
Commensal rats and mice are among the only animals about which no good can be said. Each year rats and mice are estimated to cost the American public over $1 billion. This loss is due to contamination of food stuff, structural damage, etc. To give an idea how these rodents can effect the economic picture, assume a rat will eat 25 pounds of chicken feed per year and foul another 25 pounds to such extent it cannot be used as feed (some estimates are as much as ten times greater). The house mouse will consume about 5 pounds per year. …
Control Of Wild Animals And Public Opinion, Charles H. Callison
Control Of Wild Animals And Public Opinion, Charles H. Callison
Great Plains Wildlife Damage Control Workshop Proceedings
In 1957 the noted ornithologist Robert Cushman Murphy and other landowners on Long Island went to court in an effort to enjoin the U.S. Department of Agriculture from the aerial spraying of DDT to "eradicate" the gypsy moth. This event was years before Rachel Carson wrote Silent Spring. It may have been the first of the modern environmental law suits, although no one called it that. Certainly it was a forerunner of the modern environmental law organizations, because about ten years later the Environmental Defense Fund, was born, interestingly, in Dr. Murphy's neighborhood on Long Island. EDF's first great task …
The Prairie Naturalist Vol. 7, No.4. December 1975
The Prairie Naturalist Vol. 7, No.4. December 1975
The Prairie Naturalist
COMPARISON OF FLOWERING RECORDS FROM KANSAS AND NORTH DAKOTA ▪ O. A. Stevens
REPAIRED BONE BREAK IN A HOUSE SPARROW ▪ C. L. Cink and T. K. Broschat
A LARGE RACOON LITTER ▪ E. K. Fritzell and J. W. Matthews
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA –1975 ▪ R. N. Randall
BOOK REVIEW
Autumn Hawk Migrations ▪ P. B. Hofslund
Tertiary Treatment Of Wastewater Using Oxidation Ponds, Robert A. Lauderdale, John R. Moeller, Raymond D. Hamilton
Tertiary Treatment Of Wastewater Using Oxidation Ponds, Robert A. Lauderdale, John R. Moeller, Raymond D. Hamilton
KWRRI Research Reports
The purpose of the project was to determine the value of using lagoons as a supplemental process for treating the effluent from an activated sludge wastewater treatment plant.
Only tentative conclusions can be suggested since the project was not carried to completion. It appears that lagoons will have only minimal effect on the amounts of total nitrogen and phosphate in the plant effluent, although conversion of a portion of the ammonia to nitrate can be expected. However, the concentration of ammonia was never lower than that required by EPA guidelines. Some reduction of soluble BOD appears to occur, perhaps through …
Rural Residential Water Demand In Kentucky: An Econometric And Simulation Analysis, Orlen C. Grunewald, C. T. Haan, David L. Debertin, D. I. Carey
Rural Residential Water Demand In Kentucky: An Econometric And Simulation Analysis, Orlen C. Grunewald, C. T. Haan, David L. Debertin, D. I. Carey
KWRRI Research Reports
This study proposed that demand management through pricing policies can be used in conjunction with supply management to solve water supply problems in Kentucky. Economic principles were shown to apply to rural residential water use. From the economic model, a hyperbolic demand function was theorized. The mathematical form of this function used quantity of water as a function of price, income, value of residence, evaporation, and persons per residence. This function was estimated using ordinary least squares regression. A log-linear model was found to be a satisfactory representation of the demand function. Price was the only independent variable which was …
Water Current, Volume 7, No. 8, November/December 1975
Water Current, Volume 7, No. 8, November/December 1975
Water Current Newsletter
From the Desk of the Director
Last Call for Research Proposals
Water Resources Seminar
Title II Award From OWRT
Matching Grant Proposals Submitted to OWRT
OWRC Advisory Council Meets
Water Research in Nebraska
New Interior Secretary Confirmed
WRC Legislation Signed by President Ford
Water Research and Technology Advisory Panel Meeting
Research Review: Application of Enzyme Methods to the Determinination of Pollutants in Water
The Flood Disaster Protection Act Of 1973: A Rational Approach To Flood Damage Prevention, Larry J. Wilson
The Flood Disaster Protection Act Of 1973: A Rational Approach To Flood Damage Prevention, Larry J. Wilson
IUSTITIA
Throughout history, man has utilized rivers for water supply, transportation, power generation, and waste disposal. This strong relationship has encouraged the location of human settlements near rivers and streams despite the risk of periodic flooding. The modern technology of transportation and public services has reduced the necessity for riverside locations, but the development of flood plains in urban areas has continued, resulting in the periodic loss of human life and property when flooding has occurred. Within the United States, flooding has taken over 5000 lives in the last fifty years and causes an estimated $1.25 billion in property damages annually.' …
Brown Co. Shut Down Period, Walter A. Lawrance
Brown Co. Shut Down Period, Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Press Reports, Walter A. Lawrance
Upper Androscoggin River, Walter A. Lawrance
Upper Androscoggin River, Walter A. Lawrance
Walter Lawrance Papers
No abstract provided.
Trace Metals And Major Elements In Water-Soluble Rocks Of Northwest Arkansas, George H. Wagner, Kenneth F. Steele, Doy L. Zachry Jr.
Trace Metals And Major Elements In Water-Soluble Rocks Of Northwest Arkansas, George H. Wagner, Kenneth F. Steele, Doy L. Zachry Jr.
Arkansas Water Resources Center Technical Reports
Trace metals in limestone are potential water contaminants because they can enter the ground water when the limestone is dissolved by carbonic acid and other naturally occurring acids. Four local limestones, the St. Joe and Pitkin Formations (Mississippian) and the Brentwood and Kessler Members of the Bloyd Formation (Pennsylvanian) were sampled in a five county area in Northwest Arkansas. Atomic absorption analyses were made for Na, K, Mg, Ca, Zh, Cu, Ba, Fe, Co, Cr, Ni, Mn, Li and Sr on the acid soluble material of the samples. All the limestones are relatively pure CaCO3 with Pitkin the purest, 93.4%. …
Water Current, Volume 7, No. 7, September/October 1975
Water Current, Volume 7, No. 7, September/October 1975
Water Current Newsletter
From the Desk of the Director
New Staff Members for NWRRI
Meeting of Institute Advisory Committee
Position Announcement
Deadline for Research Proposals
Corps Water Plan Receives Mixed Reaction
Nonpoint Source Pollution Study
Corps Begins Study of Beatrice Flood Problems
Untapped Coal to be Evaluated
Research Review: Detection of a Potential Health Hazard in Recreational and Other Surface Waters
Impact Of Development Of Offshore Oil: East Coast Of South American Case Study, Aldo H. Brussoni
Impact Of Development Of Offshore Oil: East Coast Of South American Case Study, Aldo H. Brussoni
Marine Affairs Theses and Major Papers
To analyze this Coastal Management problem it is convenient to have a regional overview of the entire South Atlantic Coast (South America). Go over some of its physical characteristics, the state of development of the offshore oil industry, the volume of its activities, and other related data, the recreational and the fishing industries, the population and its characteristics. This will develop a regional comprehension which is absolutely necessary to have in mind before analyzing the problems of any particular situation created in a country or an area of a country of the Southwest Atlantic Coast. After covering, very generally, all …
Socioeconomic Impacts Of The Second Stage Of The Southern Nevada Water Project And Its Alternatives, William T. White, Bernard Malamud, John E. Nixon
Socioeconomic Impacts Of The Second Stage Of The Southern Nevada Water Project And Its Alternatives, William T. White, Bernard Malamud, John E. Nixon
Publications (WR)
This study evaluates the socioeconomic impacts of the Second Stage of the Southern Nevada Water Project of the United States Bureau of Reclamation, comparing that project with the alternatives of importing water from Nevada areas somewhat removed from the Las Vegas Valley and of leaving the water supply of the Valley basically as it is, the no project alternative.
The study follows, with adaptations and extensions, the general methodology for socioeconomic impact studies as developed and still being evolved in successive socioeconomic analyses of Bureau of Reclamation water projects. The methodology recognizes that the complexity of modern society and water …
Physical And Chemical Properties Of Outdoor Beef Cattle Feedlot Runoff, C. B. Gilbertson, J. R. Ellis, J. A. Nienaber, T. M. Mccalla, T. J. Klopfenstein
Physical And Chemical Properties Of Outdoor Beef Cattle Feedlot Runoff, C. B. Gilbertson, J. R. Ellis, J. A. Nienaber, T. M. Mccalla, T. J. Klopfenstein
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Within the past decade, emphasis has been placed on the quality of our environment. Beef cattle feedlots have been singled out as a significant source of environmental pollution. Environmental protection provided by control facilities requires basic knowledge of the physical and chemical properties of feedlot runoff. This bulletin summarizes studies of physical and chemical properties of beef cattle feedlot runoff completed from August, 1968 through December, 1972.
The Law Of Water Allocation In Kentucky, Richard C. Ausness, Bill H. Flynn
The Law Of Water Allocation In Kentucky, Richard C. Ausness, Bill H. Flynn
KWRRI Research Reports
This study discusses navigability concepts, consumptive rights to surface and ground waters, the disposal of diffused surface waters and the administration of Kentucky's statutory water allocation system.
Federal regulatory powers are based on navigability as is state ownership of submerged lands. Kentucky uses the ebb-and-flow test of navigability to determine title to submerged lands but uses a navigability-in-fact test to determine the scope of state regulatory authority. Consumptive uses of water in Kentucky are governed by the riparian landowner to use as much water as he needs as long as his use does not interfere with the legitimate uses of …
Water Current, Volume 7, No. 6, July/August 1975
Water Current, Volume 7, No. 6, July/August 1975
Water Current Newsletter
From the Desk of the Director
New Address for NWRRI
Newsletter Publication Change
NWRRI Publications List
Deadline for Research Proposals
NWRRI Fiscal Year 1976 Research Program
Groundwater Recharge Study
Irrigation Research Explained at SAL Field Day
Research Review: Computer Modeling to Maximize Water Use Efficiency and Reduce Energy in Irrigation
Trace Element Composition Of Stream Sediments An Integrating Factor For Water Quality, Kenneth F. Steele, Harold C. Macdonald, George H. Wagner, William S. Bowen
Trace Element Composition Of Stream Sediments An Integrating Factor For Water Quality, Kenneth F. Steele, Harold C. Macdonald, George H. Wagner, William S. Bowen
Arkansas Water Resources Center Technical Reports
Bottom sediments, suspended sediments, and water were sampled along 130 miles of the Buffalo River in northern Arkansas. The water and acid extracts of the suspended sediments and the minus 95 mesh fraction of the bottom sediments were analyzed by atomic absorption spectrometry. All samples were analyzed for Na, K, Mg, Ca, Zn, Cd, Cu, Pb, Fe, Co, Cr, Ni, and Mn. Selected bottom samples also were analyzed by As, Hg, and Zr. Zr was determined by x-ray fluorescence. Li and Sr were determined for selected water and suspended sediment samples. There is a general decrease downstream in Fe, Cu, …
Survival And Growth Rate Of Channel Catfish As A Function Of Dissolved-Oxygen Concentration, R. W. Raible
Survival And Growth Rate Of Channel Catfish As A Function Of Dissolved-Oxygen Concentration, R. W. Raible
Arkansas Water Resources Center Technical Reports
Channel catfish were raised in water-recirculating systems for several periods of about six months duration each. Initial stock was fingerling size fish (10 to 20 grams). At dissolved-oxygen levels below 2.5 parts per million, mortality was high. Fish raised in tanks held at dissolved-oxygen levels between 3.0 and 6.8 parts per million showed increased gains of weight for each increment of added oxygen. Weight gains were as much as 50 percent higher at 6.8 parts per million compared with weights at 3.0 parts per million. Feed conversion was good in all cases. When feeding was limited to demand, feed conversion …
Movement Of Pesticides In The Soil Water Fertilizer System, H. Don Scott
Movement Of Pesticides In The Soil Water Fertilizer System, H. Don Scott
Arkansas Water Resources Center Technical Reports
A theoretical and experimental study of the transport of pesticides was conducted in several Arkansas soils with metribuzin, a herbicide. In a field study, chloride and metribuzin were applied to a Captina silt loam under maximum leaching conditions and their redistribution was compared with that of soil water. Metribuzin was found in significantly detectable quantities to a depth of 61 cm; the largest concentrations were detected in the surface 23 cm and particularly in the 0-5 cm increment. Two days after application 72.6 and 33.6% could be detected in the vegetation and no-vegetation plots. The metribuzin half life was 7.88 …
Biochrome Analysis As A Method For Assessing Phytoplankton Dynamics Phase Ii, Richard L. Meyer
Biochrome Analysis As A Method For Assessing Phytoplankton Dynamics Phase Ii, Richard L. Meyer
Arkansas Water Resources Center Technical Reports
Selected chemical, physical and biological parameters were determined for a man-made lake, Beaver Lake, on the White River of Arkansas and Missouri. The research program determined the qualitative and quantitative aspects of the temporal and spatial distribution of the algal subcommunities. It was determined that the epipelic, epilithic, epizooic and metaphytic subcommunities had little influence on the euplanktonic subcommunity. The relationship between the qualitative and quantitative analysis of the biochromes chlorophyll-a, -b, and -c and the phytoplankton species clustered into biochrome sets is discussed. The temporal and spatial distributional patterns of temperature, oxygen, ammonia-N, nitrate-N, orthophosphate-P and silicates are described …
Pollution Abatement From Cattle Feedlots In Northeastern Colorado And Nebraska, L. K. Porter, F. G. Viets Jr., T. M. Mccalla, L. F. Elliott, F. A. Norstadt, H. R. Duke, N. P. Swanson, L. N. Mielke, G. L. Hutchinson., A. R. Mosier, G. E. Schuman, Lynn R. Shuyler, C. E. Evans
Pollution Abatement From Cattle Feedlots In Northeastern Colorado And Nebraska, L. K. Porter, F. G. Viets Jr., T. M. Mccalla, L. F. Elliott, F. A. Norstadt, H. R. Duke, N. P. Swanson, L. N. Mielke, G. L. Hutchinson., A. R. Mosier, G. E. Schuman, Lynn R. Shuyler, C. E. Evans
United States Environmental Protection Agency: Publications
Climatic factors, feedlot runoff, and organic material in the runoff were evaluated in experimental and commercial feedlots. The effects of slope, stocking rates, terraces, basins, and holding ponds were evaluated to obtain the best controls for containing runoff. In eastern Nebraska, 70 cm annual precipitation produces 23 cm of runoff; whereas, in northeastern Colorado, 37 cm annual precipitation gives only 5.5 cm of runoff. Large applications of runoff liquid, up to 91 cmon grass-Ladino and 76 cm on corn, in Nebraska did not decrease yields; however, in northeastern Colorado, the concentrated high-salt runoff required dilution before direct application to crops. …