Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 11611 - 11640 of 12754

Full-Text Articles in Entire DC Network

Nontributary Ground Water: A Continuing Dilemma, William A. Paddock Oct 1985

Nontributary Ground Water: A Continuing Dilemma, William A. Paddock

Colorado Water Issues and Options: The 90's and Beyond: Toward Maximum Beneficial Use of Colorado's Water Resources (October 8)

47 pages.

Contains 2 pages of footnotes.


Somalia Fisheries Development: Past, Present And Future, Bruce Barbour Oct 1985

Somalia Fisheries Development: Past, Present And Future, Bruce Barbour

Marine Affairs Theses and Major Papers

This paper is being presented in three distinct parts. Each section deals with fisheries development in Somalia, East Africa, past, present and future. The first section focuses on a project proposal by a World Bank/U.N. FAO joint effort. This proposal exemplifies a traditional approach to development. This traditional approach will be defined and then evaluated. The second section is a report of the authors consultancy to the Somali government concerning the development of the fisheries within the Coastal Development Projects jurisdiction. The approach employed was one of first defining the problem and then working on solutions. This section is being …


Leachate Monitoring In Naturally Saline Groundwater Chesapeake Landfill Chesapeake Virginia, T. Britt Mcmillan Oct 1985

Leachate Monitoring In Naturally Saline Groundwater Chesapeake Landfill Chesapeake Virginia, T. Britt Mcmillan

OES Theses and Dissertations

Groundwater chemistry around the Chesapeake municipal landfill was monitored over a one year period. Ten sample sites as well as two surface water sites were used to monitor water quality. Two wells, one at 3 m and the other at 10 m were located at each site. Surface water samples were taken from the Elizabeth River, north of the landfill, and a tidal channel, west of the landfill. Seven groundwater sites were downgradient of the landfill and three sites were upgradient (control sites).

The landfill overlies a tidal marsh, approximately 100 m south of the intracoastal waterway (Elizabeth River). Dredge …


Microbial Characteristics Of An Industrial Mixed Liquor After Exposure To Phenolic Compounds, Patricia L. Boyle Sep 1985

Microbial Characteristics Of An Industrial Mixed Liquor After Exposure To Phenolic Compounds, Patricia L. Boyle

Theses

The microbial characteristics of a mixed population from the Passaic Valley Sewerage Commissioners (PVSC) Wastewater Treatment Plant in Newark were examined. This plant handles about 250 million gallons per day of mixed sewerage, with a large industrial component. The microbial species were characterized using standard plating techniques, morphology, microscopic observation, and biochemical tests. These characteristics were determined for the fresh liquor, and after successive batch exposure to phenol (100 ppm) and 2-chlorophenol (20 ppm). Predator/prey, gram positive to gram negative bacteria ratios, and the fungi and protozoan populations were also determined. These results were compared with those previously obtained using …


Reformulated 4-Aminopyridine Baits Cost-Effectively Reduce Blackbird Damage To Ripening Cornfields, Jerome F. Besser, John W. Degrazio Sep 1985

Reformulated 4-Aminopyridine Baits Cost-Effectively Reduce Blackbird Damage To Ripening Cornfields, Jerome F. Besser, John W. Degrazio

Eastern Wildlife Damage Control Conference: 2nd (1985)

In 1984 4-aminopyridine baits, stabilized with hydrochloric acid, were appraised in ripening cornfields being attacked by blackbirds on the Sand Lake National Wildlife Refuge., South Dakota. In 1982, i t had been discovered that 4-aminopyridine, the active agent in commercial Avitrol® baits for crop protection rapidly vaporized at summer storage and field baiting temperatures.

In July, baiting lanes were created in 12 cornfields by destroying every 55th row. In August after a 3-day pretreatment period, fields were baited with Avitrol® FC Corn Chops-99 for a 2-week period when corn was most vulnerable to damage. Bait was applied from baiting lanes …


Vole Control In The Eastern United States, Richard M. Poche, Robert Sharp Sep 1985

Vole Control In The Eastern United States, Richard M. Poche, Robert Sharp

Eastern Wildlife Damage Control Conference: 2nd (1985)

The meadow vole (Microtus pennsylvanicus) and pine vole (M. pinetorum) are major pests in fruit orchards in the eastern U.S. These species damage trees by gnawing the bark or root systems during the winter months, thus, reducing the fruit yields or in many cases actually killing the trees. Orchard owners generally use an integrated pest management approach involving a combination of methods: (1) cultural practices such as reducing favorable vole habitat, thereby, limiting the carrying capacity, (2) mechanical control through the use of tree guards or trapping techniques, and (3) the use of rodenticides, both acute …


Vole Control In The Eastern United States, Richard M. Poche, Robert Sharp Sep 1985

Vole Control In The Eastern United States, Richard M. Poche, Robert Sharp

Wildlife Damage Management Conference

The meadow vole (Microtus pennsylvanicus) and pine vole (M. pinetorum) are major pests in fruit orchards in the eastern U.S. These species damage trees by gnawing the bark or root systems during the winter months, thus, reducing the fruit yield, or in many cases actually killing the trees. Orchard owners generally use an integrated pest management approach involving a combination of methods: (1) cultural practices such as reducing favorable vole habitat, thereby, limiting the carrying capacity, (2) mechanical control through the use of tree guards or trapping techniques, and (3) the use of rodenticides, both acute …


Comparisons Of Strychnine And Zinc Phosphide In Prairie Dog Control, H. Todd Holbrook, Robert M. Timm Sep 1985

Comparisons Of Strychnine And Zinc Phosphide In Prairie Dog Control, H. Todd Holbrook, Robert M. Timm

Wildlife Damage Management Conference

Efficacy and safety are primary considerations in registration and use of toxicants for vertebrate pest control. Strychnine (0.5%) and zinc phosphide (2%) are currently registered by EPA for prairie dog control, but continued registration is uncertain. Two percent zinc phosphide bait has been suspected of producing lower and more erratic results than strychnine bait. In our study in western Nebraska in fall 1984, indices based on changes in burrow activity showed no difference in efficacy (P =0.66) or variability (P= 0.7) of control for strychnine and zinc phosphide, however neither toxicant consistently gave effective control or black-tailed prairie dogs. Costs …


Estimating Cost-Effectiveness Of Controlling Animal Damage To Conifer Seedlings, David S. Decalesta Sep 1985

Estimating Cost-Effectiveness Of Controlling Animal Damage To Conifer Seedlings, David S. Decalesta

Wildlife Damage Management Conference

A model for determining the benefit-cost ratio of controlling damage by vertebrate pests to conifer seedlings requires knowledge of the amount, distribution, and duration of animal damage, reduction in damage associated with control, costs of control, methodology and value of trees at harvest. Because control costs occurring in the present must be compared with savings recovered decades later in the future, the model incorporates procedures for discounting or adjusting future monetary benefits into present net worth valuations. The model allows forest managers to evaluate a wide range of damage costs and savings accruing from use of various control techniques. The …


Management Implications Derived From Bird Damage Assessments In North Dakota Sunflower, Joseph L. Guarino, John L. Cummings Sep 1985

Management Implications Derived From Bird Damage Assessments In North Dakota Sunflower, Joseph L. Guarino, John L. Cummings

Eastern Wildlife Damage Control Conference: 2nd (1985)

The most recent estimate of blackbird damage to ripening sunflower (Helianthus annuus) in North Dakota in 1980 exceeded $6 million. Although less than 5% of the sunflower fields in the state received greater than 10% damage in each of four past survey years, as much as 50% of the total state-wide damage occurred in these fields. This loss can be combated with cost-effective control- Successful control requires timely action when blackbirds are in large concentrations. Frightening blackbirds from fields early in the damage season disperses damage and this can result in compensatory growth by sunflower, whereby yields at …


Comparisons Of Strychnine And Zinc Phosphide In Prairie Dog Control, H. Todd Holbrook, Robert M. Timm Sep 1985

Comparisons Of Strychnine And Zinc Phosphide In Prairie Dog Control, H. Todd Holbrook, Robert M. Timm

Eastern Wildlife Damage Control Conference: 2nd (1985)

Efficacy and safety are primary considerations in registration and use of toxicants for vertebrate pest control. Strychnine (0.5%) and zinc phosphide (2%) are currently registered by EPA for prairie dog control, but continued registration is uncertain. Two percent zinc phosphide bait has been suspected of producing lower and more erratic results than strychnine bait. In our study in western Nebraska in fall 1984, indices based on changes in burrow activity showed no difference in efficacy (P=0.66) or variability (P=0.7) of control for strychnine and zinc phosphide, however neither toxicant consistently gave effective control of blackballed prairie dogs. Costs for proper …


Air Force Problems With Birds In Hangars, Timothy J. Will Sep 1985

Air Force Problems With Birds In Hangars, Timothy J. Will

Wildlife Damage Management Conference

The Air Force's Bird - Aircraft Strike Hazard (BASH) Team has been dealing with bird hazards to aircraft for over ten years, primarily through awareness programs, direct assistance to military bases, and through R&D aimed at world-wide BASH reduction. As with any problem where a biological system (in this case, birds) is involved, diversification is important in developing solutions. The BASH Team has recommended a variety of methods for working with hazards from birds. One area of particular concern is the nuisance of pest birds in hangars. These structures are extremely alluring to birds, which seek the roof-supporting I-beams and …


Management Implications Derived From Bird Damage Assessments In North Dakota Sunflower, Joseph L. Guarino, John L. Cummings Sep 1985

Management Implications Derived From Bird Damage Assessments In North Dakota Sunflower, Joseph L. Guarino, John L. Cummings

Wildlife Damage Management Conference

The most recent estimate of blackbird damage to ripening sunflower (Helianthus annuus) in North Dakota in 1980 exceeded $6 million. Although less than 5% of the sunflower fields in the state received greater than 10% damage in each of four past survey years, as much as 50% of the total state-wide damage occurred in these fields. This loss can be combated with cost-effective control. Successful control requires timely action when blackbirds are in large concentrations. Frightening blackbirds from fields early in the damage season disperses damage and this can result in compensatory growth by sunflower, whereby yields at …


Reformulated 4-Aminopyridine Baits Cost-Effectively Reduce Blackbird Damage To Ripening Cornfields, Jerome F. Besser, John W. De Grazio Sep 1985

Reformulated 4-Aminopyridine Baits Cost-Effectively Reduce Blackbird Damage To Ripening Cornfields, Jerome F. Besser, John W. De Grazio

Wildlife Damage Management Conference

In 1984 4-aminopyridine baits, stabilized with hydrochloric acid, were appraised in ripening cornfields being attacked by blackbirds on the Sand Lake National Wildlife Refuge, South Dakota. In 1982, it had been discovered that 4-aminopyridine, the active agent in commercial Avitrol® baits for crop protection rapidly vaporized at summer storage and field baiting temperatures.

In July, baiting lanes were created in 12 cornfields by destroying every 55th row. In August after a 3-day pretreatment period, fields were baited with Avitrol® FC Corn Chops-99 for a 2-week period when corn was most vulnerable to damage. Bait was applied from baiting …


Air Force Problems With Birds In Hangars, Timothy J. Will Sep 1985

Air Force Problems With Birds In Hangars, Timothy J. Will

Eastern Wildlife Damage Control Conference: 2nd (1985)

The Air Force's Bird-Aircraft Strike Hazard (BASH) Team has been dealing with bird hazards to aircraft for over ten years, primarily through awareness programs, direct assistance to military bases, and through R&D aimed at world-wide BASH reduction. As with any problem where a biological system (in this case, birds) is involved, diversification is important in developing solutions. The BASH Team has recommended a variety of methods for working with hazards from birds. One area of particular concern is the nuisance of pest birds in hangars. These structures are extremely alluring to birds, which seek the roof-supporting I-beams and bars for …


Estimating Cost-Effectiveness Of Controlling Animal Damage To Conifer Seedlings, David S. Decalesta Sep 1985

Estimating Cost-Effectiveness Of Controlling Animal Damage To Conifer Seedlings, David S. Decalesta

Eastern Wildlife Damage Control Conference: 2nd (1985)

A model for determining the benefit-cost ratio of controlling damage by vertebrate pests to conifer seedlings requires knowledge of the amount, distribution, and duration of animal damage, reduction in damage associated with control, costs of control, methodology and value of trees at harvest. Because control costs occurring in the present must be compared with savings recovered decades later in the future, the model incorporates procedures for discounting or adjusting future monetary benefits into present net worth valuations,, The model allows forest managers to evaluate a wide range of damage costs and savings accruing from use of various control techniques. The …


Resource Law Notes Newsletter, No. 6, Sept. 1985, University Of Colorado Boulder. Natural Resources Law Center Sep 1985

Resource Law Notes Newsletter, No. 6, Sept. 1985, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.


The Behavior Of Soluble Salt In Sharkey Clay, J. T. Gilmour, J. A. Ferguson, H. D. Scott, R. E. Baser Sep 1985

The Behavior Of Soluble Salt In Sharkey Clay, J. T. Gilmour, J. A. Ferguson, H. D. Scott, R. E. Baser

Arkansas Water Resources Center Technical Reports

Soluble salt problems do exist and are significant in Arkansas. Studies have been conducted on Crowley silt loam (Typic Albaqualfs) which have established the behavior of soluble salt in that soil. The major objective of this study was to quantify the behavior of soluble salt in a second important Mississippi River Delta soil - the Sharkey (Vertic Haplaquepts). To this end, estimation of the downward redistribution of salt and the estimation of various components of the water balance for this soil served as specific objectives. Field studies were designed to monitor the movement of salt in the Sharkey soil and …


The Prairie Naturalist Volume 17, No. 3. September 1985 Sep 1985

The Prairie Naturalist Volume 17, No. 3. September 1985

The Prairie Naturalist

Paul B. Kannowski, Editor

Nikki R. Seabloom, Assistant Editor

Douglas H. Johnson, Book Review Editor

TABLE OF CONTENTS

EFFECTS OF FIRE ON NUTRIENT AND ENERGY CONCENTRATION OF FIVE PRAIRIE GRASS SPECIES ▪ K. M. Ohr and T. B. Bragg

FOOD HABITS OF JUVENILE GIZZARD SHAD IN OPEN-WATER AND NEAR-SHORE HABITATS OF MELVERN RESERVOIR, KANSAS ▪ B. L. Todd and D. W. Willis

CHANGES IN BREEDING BLACKBIRD NUMBERS IN NORTH DAKOTA FROM 1967 TO 1981–82 ▪ J. F. Besser

RARE ANIMALS AND PLANTS OF SOUTH DAKOTA ▪ W. C. Houtcooper, D. J. Ode, J. A. Pearson, and G. M. Vandel III …


Modeling Of Overland Flow By The Diffusion Wave Approach, Rao S. Govindaraju, S. E. Jones, M. L. Kavvas Aug 1985

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 …


The Probe, Issue 55 - August 1985 Aug 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


Development Of General Guidelines For The Planning Of Stormwater Management Facilities: Application To Urban Watersheds In Kentucky, Lindell E. Ormsbee, Vincent T. Reinert Aug 1985

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. …


Investigation Of Pollution In A Karst Aquifer Utilizing Optical Brightener, John Thrailkill, Ralph F. Wiseman, Bridget R. Scanlon Aug 1985

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 …


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 Jul 1985

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.


Operating Under New Laws Pertaining To Mineral Development On Indian Lands, B. Reid Haltom Jun 1985

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, …


Diligence Requirements Under The Federal Coal Leasing Amendments Act Of 1975, Gail L. Wurtzler Jun 1985

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.


The Federal Coal Leasing Program, John Latz Jun 1985

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.


Pitfalls In Federal Oil And Gas Leasing Practice, Terry N. Fiske Jun 1985

Pitfalls In Federal Oil And Gas Leasing Practice, Terry N. Fiske

Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)

13 pages.

Contains references.


Federal Royalty Management On Federal Onshore And Indian Lands: Industry Concerns, R. Carol Harvey Jun 1985

Federal Royalty Management On Federal Onshore And Indian Lands: Industry Concerns, R. Carol Harvey

Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)

68 pages.

Contains references.

Contains 8 appendices.


Current Developments In Public Lands Administration, Lawrence G. Mcbride Jun 1985

Current Developments In Public Lands Administration, Lawrence G. Mcbride

Public Lands Mineral Leasing: Issues and Directions (Summer Conference, June 10-11)

24 pages.