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Articles 47461 - 47490 of 52454
Full-Text Articles in Physical Sciences and Mathematics
Qualitative And Quantitative Aquatic Algal Data Compilation To Determine Macrotrends, Richard L. Meyer
Qualitative And Quantitative Aquatic Algal Data Compilation To Determine Macrotrends, Richard L. Meyer
Arkansas Water Resources Center Technical Reports
A data base of the algae of Arkansas has been initiated by the selection of a relational data base management system. The system was chosen to be readily available for microcomputers using MS- or PC-DOS. The initial parameters chosen for entry are associated with the classification of the organisms from Class to the Variety level with author and year of initiation. Further annotation includes identification source. Presently, the data base of 1,162 taxa includes 226 Cyanophyceae, 367 Chlorophyceae, 124 Euglenophyceae, 26 Xanthophyceae, 81 Chryso- phyceae, 279 Bacillariophyceae, 33 Pyrrhophyceae, 14 Cryptophyceae, and 5 Rhodophyceae. These taxa are sortable by any …
Optimal Allocation And Scheduling Of Irrigation Water For Cotton And Soybeans, M. J. Cochran, L. D. Parsch, J. M. Redfern, H. D. Scott
Optimal Allocation And Scheduling Of Irrigation Water For Cotton And Soybeans, M. J. Cochran, L. D. Parsch, J. M. Redfern, H. D. Scott
Arkansas Water Resources Center Technical Reports
This study evaluated alternative irrigation scheduling strategies for cotton and soybean production on Sharkey clay soils in southeast Arkansas. Strategies were ranked on the basis of two basic criteria: expected net revenue and risk efficiency. Risk efficiency was defined for different risk preferences using stochastic dominance techniques. Preferred strategies for cotton employed tensiometer thresholds between -.45 atm and -.75 atm. Risk efficient soybean irrigation strategies varied with the degree of risk aversion--more risk averse decision makers prefer strategies with lower thresholds.
Analyses Of Groundwater For Trace Levels Of Pesticides, T. L. Lavy, J. D. Mattice, T. C. Cavalier
Analyses Of Groundwater For Trace Levels Of Pesticides, T. L. Lavy, J. D. Mattice, T. C. Cavalier
Arkansas Water Resources Center Technical Reports
Agricultural production is a major source of revenue in Arkansas. In order to increase productivity, it has been necessary to rely increasingly on the use of pesticides and irrigation water. In the last 15 years several states have reported finding pesticides in groundwater as a result of normal agricultural practices. Since almost half of the population also relies on groundwater as their source of drinking water, it is necessary to conduct research as to ascertain the presence or absence of commonly used pesticides in groundwater. Multi residue analytical techniques were developed for the analysis of acifluorfen, alachlor, atrazine, cyanazine, diuron, …
Development Of General Guidelines For The Planning Of Stormwater Management Facilities: Application To Urban Watersheds In Kentucky, Lindell E. Ormsbee, Vincent T. Reinert
Development Of General Guidelines For The Planning Of Stormwater Management Facilities: Application To Urban Watersheds In Kentucky, Lindell E. Ormsbee, Vincent T. Reinert
KWRRI Research Reports
This report provides a planning methodology and a design tool to help determine the appropriate location and volume of detention basins required to control critical storm events. The technique involves using watershed characteristics including the SCS curve number, time of concentration, peak outflow rate, watershed area and the storage recurrence interval to help predict these detention volumes.
Historical rainfall records are used in a revised continuous simulation program (SYNOP, Hydroscience, Inc,) to determine the rainfall excess from which runoff hydrographs are produced. Various combinations of the watershed characteristics were input and computer analyses done to obtain the required data base. …
The Probe, Issue 55 - August 1985
The Probe, Issue 55 - August 1985
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association
No. 55 August, 1985
To Russia, With Love?
Predators and Pesticides
Secondary Hazards to Owls
Phosphine Disposal Problems
Pro-Pesiticide Group
Letter to the Editor of Country Journal
1080 Toxic Collar
EPA
McKinzie Catalog
Forest-Animal Damage Control Research
USFWS Zinc Phosphide Formulations
Birds and Blueberries
Investigation Of Pollution In A Karst Aquifer Utilizing Optical Brightener, John Thrailkill, Ralph F. Wiseman, Bridget R. Scanlon
Investigation Of Pollution In A Karst Aquifer Utilizing Optical Brightener, John Thrailkill, Ralph F. Wiseman, Bridget R. Scanlon
KWRRI Research Reports
Optical brightener is an additive to laundry detergents and is found contaminating groundwater. Its concentration may rapidly and inexpensively be determined by fluorescence techniques, and because its source is human wastewater, its presence in groundwater serves as a direct indication of pollution from septic tanks, sewer leaks, and landfills.
A total of 105 wells and springs in an area within the Inner Bluegrass Karst Region near Lexington, Kentucky, were described and sampled. Analyses were made for optical brightener (430 samples), total coliform (91), fecal coliform (93), and fecal streptococci (90). As many as 20 optical brightener and 4 bacterial samples …
Modeling Of Overland Flow By The Diffusion Wave Approach, Rao S. Govindaraju, S. E. Jones, M. L. Kavvas
Modeling Of Overland Flow By The Diffusion Wave Approach, Rao S. Govindaraju, S. E. Jones, M. L. Kavvas
KWRRI Research Reports
One of the major issues of present times, i.e. water quality degradation and a need for precise answers to transport of pollutants by overland flow, is addressed with special reference to the evaporator pits located adjacent to streams in the oil-producing regions of Eastern Kentucky. The practical shortcomings of the state-of-the-art kinematic wave are discussed and a new mathematical modeling-approach for overland flows using the more comprehensive diffusion wave is attempted as the first step in solving this problem. A Fourier series representation of the solution to the diffusion wave is adopted and found to perform well. The physically justified …
Habitat Suitability Index Models: Snowshoe Hare, R.G. Carreker
Habitat Suitability Index Models: Snowshoe Hare, R.G. Carreker
United States Department of Agriculture Wildlife Services: Staff Publications
This document is part of the Habitat Suitability Index (HSI) Model Series [Biological Report 82(10)] which provides habitat information useful for impact assessment and habitat management. Several types of habitat information are provided. The Habitat Use Information Section is largely constrained to those data that can be used to derive quantitative relationships between key environmental variables and habitat suitability. This information provides the foundation for the HSI model and may be useful in the development of other models more appropriate to specific assessment or evaluation needs. The HSI Model Section documents the habitat model and includes information pertinent to its …
Development Of Optimal Sustained Yield Groundwater Withdrawal Strategies For The Boeuf-Tensas Basin In Arkansas, Richard C. Peralta, Bithin Datta, Jamal Solaimanian, Paul J. Killian, Amin Yazdanian
Development Of Optimal Sustained Yield Groundwater Withdrawal Strategies For The Boeuf-Tensas Basin In Arkansas, Richard C. Peralta, Bithin Datta, Jamal Solaimanian, Paul J. Killian, Amin Yazdanian
Arkansas Water Resources Center Technical Reports
The goal of this study ia to develop sustained yield pumping (discharge via wells) strategies for the Boeuf-Tensaa Basin area. The demarkation of the Boeut-Tensas area is described in the Arkansas State Vater Plan (Arkansas Soil and Water Conservation Commission. 1984). The Boeuf-Teneas Basin ia a highly developed agricultural region located in the southeast corner of Arkansas. Hydrogeologically. it is part of the Bayou Bartholomew/Alluvial Aquifer System (Broom and Reed. 1973). Before describing the Boeuf-Tensas Basin, the Bayou Bartholomew region should be discussed.
A Water Quality Element For The Extension Of The Salt Ponds Special Area Management Plan To Quonochontaug, Winnapaug (Brightmans) And Maschaug Ponds, Clarkson A. Collins
A Water Quality Element For The Extension Of The Salt Ponds Special Area Management Plan To Quonochontaug, Winnapaug (Brightmans) And Maschaug Ponds, Clarkson A. Collins
Marine Affairs Theses and Major Papers
The Salt Ponds Project scientific research and management efforts were designed to address the management issues typical to barrier beach-lagoon systems. It was anticipated that the finds of the project would be applied to the management of similar estuarine systems in Rhode Island and elsewhere. This paper presents findsings and recommendations relating to water quality and land use for the watersheds of Quonochontaug Pond, Winnapaug Pond, and Maschaug Ponds. With the inclusion of these waterbodies into the SAM Plan framework, all of the barrier beach-coastal lagoon ecosystems of the south shore will come under a plan specifically designed to protect …
Water Current, Volume 17, No. 4, July/August 1985
Water Current, Volume 17, No. 4, July/August 1985
Water Current Newsletter
Director's Report
Research Proposals Due
Rainwater Basin Tour
Nebraska Water Levels Rise for Fourth Year
Estimated Costs Vary for 1985 Irrigation
Research Review: Irrigation Scheduling Procedures with Limited Water for Improved Water Use Efficiency for Corn and Soybeans
The Thirsty Earth: Acid Rain - A Sour Drink, Margaret R. Souza
The Thirsty Earth: Acid Rain - A Sour Drink, Margaret R. Souza
Bridgewater Review
No abstract provided.
Identification Of Soil-Water Chemical Parameters For The Prediction And Treatment Of Suspended Solids In Surface Water Reservoirs Of Coal Mine Lands, V. P. Evangelou, J. H. Grove, R. I. Barnhisel
Identification Of Soil-Water Chemical Parameters For The Prediction And Treatment Of Suspended Solids In Surface Water Reservoirs Of Coal Mine Lands, V. P. Evangelou, J. H. Grove, R. I. Barnhisel
KWRRI Research Reports
High concentrations of suspended solids in coal mine sedimentation ponds are a factor in lowering water quality. Colloidal particle settling simulations were carried out in the laboratory to test the influence pH and dissolved solids have on concentration and settling rates of suspended solids. The results of the study reveal that the pH range of colloidal coflocculation for the samples tested is between 3.5 and 4.5. Furthermore, liming simulation of acidic sediments, as expected increased colloid dispersion. This increase was dependent on the magnitude of the sodium adsorption ratio (SAR). The greater SAR systems maintained a greater concentration of colloidal …
John Muir Newsletter, July/September 1985, Holt-Atherton Pacific Center For Western Studies
John Muir Newsletter, July/September 1985, Holt-Atherton Pacific Center For Western Studies
Muir Center Newsletters (1981-2015)
Holt-Atherton Pacific Center \\/ / University of the Pacific for Western Studies \. Stockton, Calif 95211 VOLUME 5 JULY/SEPTEMBER 1985 NUMBER 3 EDITORIAL STAFF: RONALD H. LIMBAUGH, KIRSTEN E. LEWIS A NEW FORMAT NEXT ISSUE We have published this little newsletter the last five years as a means of keeping interested subscribers informed on the status of the John Muir Papers Microform Project. As you will see by the following item, the project is near completion, and by definition the raison d'etre for this modest rag will end. However, until the end of this year we will keep current Muir …
First Annual Progress Report For The Period July 1 , 1984 - June 30, 1985, Chesapeake Bay Research And Submerged Aquatic Vegetation Initiatives, Virginia Institute Of Marine Science
First Annual Progress Report For The Period July 1 , 1984 - June 30, 1985, Chesapeake Bay Research And Submerged Aquatic Vegetation Initiatives, Virginia Institute Of Marine Science
Reports
No abstract provided.
Effects Of Urbanization On The Quantity And Quality Of Storm Water Runoff Recharging Through Caves Into The Edwards Aquifer, Bexar County, Texas, George Veni
Masters Theses & Specialist Projects
Eighty-nine caves and sinkholes were investigated in the Edwards Aquifer recharge zone in Bexar County, Texas. The study examined their hydrogeologic and topographic origins and distribution, relationships to major fracture traces, quantity of recharge into the aquifer and degree of sensitivity towards degradation of the aquifer’s water quality. Groundwater traces were attempted to determine aquifer flow routes, time of groundwater travel, groundwater volume within conduits, and the aquifer’s capacity for dilution and dispersion of recharged contaminants. Trends in water quality were examined to quantify the volume and variety of contaminants recharged into the aquifer and to determine the effects of …
Physical Properties Of Tar Sand Tailings That Influence Their Ability To Sustain Plant Growth, Timothy Cole
Physical Properties Of Tar Sand Tailings That Influence Their Ability To Sustain Plant Growth, Timothy Cole
Masters Theses & Specialist Projects
The mining of bituminous sandstone rock for the purpose of extracting bitumen has created a need for reclamation. One such mine is located in northern Logan County. Their mining operation involves removing large sections of sandstone, which is impregnated with bitumen, and crushing it to sand-sized material. The sand-sized material is then mixed with organic solvents which extract the bitumen. Once separated, the bitumen is stored for future refinement and the spent sand is stockpiled for later disposal.
The spent sands or waste material are referred to as tar sand tailings. These tailings have particular properties which make reclamation efforts …
Projections Of Agricultural And Fish And Wildlife Water Demand In The Ouachita River Basin: A Linear Programming Approach, Mark J. Cochran, Mike Tessaro, J. Martin Redfern, Larry Childress, E. Moye Rutledge, Rob Raskin, Robert N. Shulstad
Projections Of Agricultural And Fish And Wildlife Water Demand In The Ouachita River Basin: A Linear Programming Approach, Mark J. Cochran, Mike Tessaro, J. Martin Redfern, Larry Childress, E. Moye Rutledge, Rob Raskin, Robert N. Shulstad
Arkansas Water Resources Center Technical Reports
The availability of an abundant water supply has been a major resource of the Ouachita River Basin. In recent years, water requirements for a number of uses have increased, raising the concern that future water shortages could occur in the basin. The purpose of the study reported here was to estimate future water demand for irrigation, commercial fisheries, and fish and wildlife uses.
Hillsborough Bay Macroalgae Study Final Report, Mangrove Systems, Inc.
Hillsborough Bay Macroalgae Study Final Report, Mangrove Systems, Inc.
Reports
Hillsborough Bay. the northeastern portion of the Tampa Bay estuarine system (Fig. 1) has long suffered from the problems caused by industry and urbanization (Simon 1974). The macroalgal community of this estuary has been identified as a source of nuisance odor problems for many years. A study by the Federal Water Pollution Control Administration (FWPCA 1969) indicated that these problems resulted from degraded water quality (primarily eutrophication) which led to large populations of one or two species of marine red algae (Gracilaria spp.). Seasonal freshwater input resulted in the death and decay of these quantities of algae, producing the odor …
The Federal Coal Leasing Program, John Latz
The Federal Coal Leasing Program, John Latz
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
22 pages (includes 1 illustration and 1 map).
Contains 3 pages of references.
Quantification Of Indian Rights: Problems Of Proof, Harry R. Sachse
Quantification Of Indian Rights: Problems Of Proof, Harry R. Sachse
The Federal Impact on State Water Rights (Summer Conference, June 11-13)
32 pages.
Diligence Requirements Under The Federal Coal Leasing Amendments Act Of 1975, Gail L. Wurtzler
Diligence Requirements Under The Federal Coal Leasing Amendments Act Of 1975, Gail L. Wurtzler
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
51 pages.
Contains references.
Readjustment Of Federal Coal Leases, Marilyn S. Kite
Readjustment Of Federal Coal Leases, Marilyn S. Kite
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
19 pages.
Contains references.
Getting The Coal Leasing Program Back On Track: The Linowes Commission And Beyond, Sandra L. Blackstone
Getting The Coal Leasing Program Back On Track: The Linowes Commission And Beyond, Sandra L. Blackstone
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
37 pages.
Contains 2 pages of references.
Leases For Other Minerals: Recent Developments, Thomas F. Cope
Leases For Other Minerals: Recent Developments, Thomas F. Cope
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
14 pages.
Contains references.
State And Local Regulation Affecting Public Lands Mineral Lease Activities: What Are The Limits?, Lawrence J. Macdonnell
State And Local Regulation Affecting Public Lands Mineral Lease Activities: What Are The Limits?, Lawrence J. Macdonnell
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
27 pages.
Contains references.
Operating Under New Laws Pertaining To Mineral Development On Indian Lands, B. Reid Haltom
Operating Under New Laws Pertaining To Mineral Development On Indian Lands, B. Reid Haltom
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
89 pages.
Contains 8 attachments:
1) Indian Mineral Development Act of 1982, Public Law 97-382 - Dec. 22, 1982.
2) Proposed BIA Regulations, 25 C.F.R. 225 and 211, Federal Register, Vol. 48, No. 134, Tuesday, July 12, 1983.
3) Billings Area Office Procedures.
4) Flow Chart.
5) Oil and Gas Exploration Joint Venture Agreement.
6) Federal Oil and Gas Royalty Management Act of 1982, Public Law 97-451 [H.R. 5121], January 12, 1983.
7) 30 C.F.R., Part 210, 212, 217, 218, 219, 228, 229, 241, 243, Federal Register, Vol. 49, No. 185, Friday, September 21, 1984.
8) 43 C.F.R., Part 3160, …
Agenda: Public Lands Mineral Leasing: Issues And Directions, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Public Lands Mineral Leasing: Issues And Directions, University Of Colorado Boulder. Natural Resources Law Center
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
University of Colorado School of Law professor Lawrence J. MacDonnell served as the conference organizer and as a member of the faculty.
Federal leasing programs, especially for oil and gas and coal, have been undergoing important changes in recent years. This conference will provide an overview and an update for those involved in public lands mineral development. Significant new issues also will be addressed.
Current Developments In Public Lands Administration, Lawrence G. Mcbride
Current Developments In Public Lands Administration, Lawrence G. Mcbride
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
24 pages.
Federal Lands Leasing Policy In The Second Reagan Administration, Robert F. Burford
Federal Lands Leasing Policy In The Second Reagan Administration, Robert F. Burford
Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)
11 pages.