Digital Commons Network^™

Modeling Chlorinated Ethene Removal In Constructed Wetlands: A System Dynamics Approach, Colby D. Hoefar

Theses and Dissertations

The purpose of this study is to gain understanding of the dynamics of the processes that degrade Perchloroethene (PCE) to ethylene, or carbon dioxide (CO₂), within the confines of a constructed wetland. A system dynamics approach will be used. This model is focused on identifying and optimizing the naturally occurring processes in stratified wetland sediment that reduce mass, toxicity, mobility, volume or concentration of contaminants in groundwater. Contaminant fate and transport within a wetland system is extremely complex and the mechanisms that drive wetland behavior are dynamic. Confidence in the model was built through verification and testing. Reasonable …

Toxicity Of Tolyltriazole To Gram-Positive Coccus Microorganisms, Heather L. Mitchell

Theses and Dissertations

Maintaining safe flight operations, military and civilian, in cold weather requires the use of de-icing fluids. Glycols, the primary component of de-icers, have been extensively studied. Water and additives such as corrosion inhibitors and other performance enhancing chemicals make up the remaining portion of de-icing fluids. Little research has been conducted on the additives, but several are suspected toxins to microorganisms, therefore the EPA regulates the disposal of spent de-icing fluids. Tolyltriazole, a corrosion inhibitor found in de-icing fluids, is a suspected human carcinogen. It is also known to be moderately toxic to microorganisms based on Microtox results. The purpose …

Winter Habitat Use And Survival Of Female Ring-Necked Pheasants (Phasianus Colchicus) In Southeastern North Dakota, H. Jeffrey Homan, George M. Linz, William J. Bleier

United States Department of Agriculture Wildlife Services: Staff Publications

From 1992 to 1995 we used radiotelemetry to monitor winter habitat selection and survival of female ring-necked pheasants (Phasianus colchicus) in southeastern North Dakota. We captured 100 birds at nine sites in six study blocks centered on cattail-dominated (Typha spp.) semi-permanent wetlands. Pheasants showed nonrandom habitat use at two hierarchical scales. At the second-order scale (23-km² blocks) semi-permanent wetlands were preferred during two winters in which habitat selection could be assessed (1992–1993 and 1994–1995). An additional second-order preference for grass-covered uplands was shown during the mild 1994–1995 winter. At the third-order scale (home-range) pheasants preferred the …

Modeling Conifer Tree Crown Radius And Estimating Canopy Cover, Samantha J. Gill, Gregory S. Biging, Edward C. Murphy

Natural Resources Management and Environmental Sciences

Models of tree crown radius were developed for several conifer species of California. Typical forest inventory variables (DBH, height, height-to-crown base, crown class, basal area per hectare, and trees per hectare) were considered as independent variables in model development. Models were fitted using both ordinary and weighted least squares methods. It was found that for the species studied, an ordinary least squares linear regression with DBH as the only independent variable was appropriate. For some species studied, the addition of other independent variables provided minor improvements over the model with only DBH. These models of crown radius could be summed …

Crop Updates 2000 Cereals - Part 4, C. Tang, Z. Rengel, E. Diatloff, B. Mcgann, Mehmet Cakir, Nick Galwey, David Poulsen, M. Carter, A. Briney, R. Wilson, R. H. Potter, M. G. K. Jones, Ian Barclay, Robyn Mclean, Dean A. Diepeveen, Rob Loughman, Ross Kingwell, Michael O'Connell, Simone Blennerhasset, Benjamin Michael Tiller, Senthold Asseng, Holger Meinke, Bill Bowden, Jeff Russell, Ivan Lee, Clare Johnson, Chris Newman, Robert Emery, Romolo Tassone, Ernestos Kostas, Graeme Ralph, Robert Sudmeyer, David Hall, Harvey Jones

Crop Updates

This session covers twelve papers from different authors:

BREEDING

1.Response to subsoil acidity of wheat genotypes differing in Al-tolerance, C. Tang, Z. Rengel, E. Diatloff and B. McGann, Soil Science and Plant Nutrition/CLIMA, University of Western Australia

2. Application of molecular markers in Barley Improvement, Mehmet Cakir¹, Nick Galwey¹ and David Poulsen^{2, 1}Plant Sciences, Faculty of Agriculture, University of Western Australia, ²Queensland Department of Primary Industries, Hermitage Research Station, Queensland

3. Implementation of molecular markers for wheat improvement in the Western Region, M. Carter¹, A. Briney¹, …

Crop Updates 2000 - Cereals Part 1, Timothy G. Reeves, Sanjaya Rajaram, Maarten Van Ginkel, Richard Trethowan, Hans-Joachim Braun, Kelly Cassaday, R. A. Mcintosh, Rob Loughman, Ross Brennan, Mike Bolland, Zed Rengel, David Isbister, Paul Blackwell, Derk Bakker, Greg Hamilton, David Houlbrooke, Cliff Spann, Doug Rowe, Patrick Gethin, Stephen Loss, Frank Boetel, Tim O'Dea, Noeleen Edwards, Wayne Pluske, Ross Brennan, M. T. F. Wong, K. Wittwer, H. Zhang

Crop Updates

This session covers eleven papers from different authors:

PLENARY PAPERS

1. New Wheat for a Secure, Sustainable Future, Timothy G. Reeves, Sanjaya Rajaram, Maarten van Ginkel, Richard Trethowan, Hans-Joachim Braun, and Kelly Cassaday, International Maize and Wheat Improvement Centre (CIMMYT)

2. Managing Cereal Rusts - a National Perspective, R.A. McIntosh, University of Sydney Plant Breeding Institute, New South Wales

3. Managing Cereal Rusts in 2000 - a regional imperative, R. Loughman, Agriculture Western Australia

4. Is nutrition the answer to wheat after canola problems?Ross Brennan¹, Bill Bowden¹, Mike Bolland¹, Zed Rengel^{2 …}

The Eos Prototype Validation Exercise (Prove) At Jornada: Overview And Lessons Learned, J. L. Privette, G. P. Asner, J. Conel, K. R. Huemmrich, R. Olson, A. Rango, A. F. Rahman, K. Thome, Elizabeth A. Walter-Shea

School of Natural Resources: Faculty Publications

The Earth Observing System (EOS) instrument teams must validate the operational products they produce from the Terra spacecraft data. As a pilot for future validation activities, four EOS teams (MODIS, MISR, ASTER, and Landsat-7) and community experts conducted an 11-day field campaign in May 1997 near Las Cruces, NM. The goals of the Prototype Validation Exercise (PROVE) included (1) gaining experience in the collection and use of field data for EOS product validation; (2) developing coordination, measurement, and data-archiving protocols; and (3) compiling a synoptic land and atmospheric data set for testing algorithms. PROVE was held at the USDA-Agricultural Research …

Portable Wood Burning Field Stove: United States Patent, John B. Hall

Economics Faculty Publications and Presentations

The ornamental design for a portable wood burning field stove.

Selenium Poisoning Of Wildlife And Western Agriculture: Cause And Effect, N. E. Korte

All U.S. Government Documents (Utah Regional Depository)

This project examined the hypothesis that selenium contamination is not the principal cause of the decline of endemic fish species in the Upper Colorado Basin. Activities employed to test this hypothesis included a reconnaissance of locations altered by recent road construction, a reinterpretation of available literature regarding selenium toxicity, and the interpretation of unpublished data obtained from the Upper Colorado Basin Fish Recovery Program. The project demonstrates that most of the evidence implicating selenium is circumstantial. Specifically, this research demonstrates that neither the historical record nor the technical literature consistently supports the emphasis given selenium toxicity. For example, many locations …

Protecting And Sharing Western Australia's Coastal Fish Resources. The Path To Integrated Management., Fisheries Western Australia

Fisheries Management Papers

The fisheries management framework of the 21st Century must not only be able to manage the level of exploitation by commercial and recreational fisheries, but also provide an agreed basis and process for changes in the way fish and aquatic resources are used and shared by this community. There is a clear need to counter inevitable pressure on stocks from the impact of a growing population, increasing coastal development and the demands of various key user groups. Unless we are proactive in dealing with the growing exploitation of fisheries along our State’s vast 12,000km coastline, it will be difficult to …

Water Current, Volume 32, No. 1, February 2000

Water Current Newsletter

Research Brief: Simple Iron Treatment Inexpensive Way to Remove Pesticides from Contaminated Soil
From the Director: A Dry-Spell or Multi-Year Drought? Elliot to Arrive in June; Awards to be Presented at NWCC Conference
Research Brief: Restoring Sandpit Lake Quality Linked to Phosphorous Reduction Technique
UNL Hosting Science Day 2000 in April
Ensuring Water for the 21st Century
Water News Briefs
Groundwater Workshops
NEEA Plans June Conference
The Law of the Missouri River
Festival Volunteers Needed
Funding for Youth Water Festivals
Time Growing Short to Get Involved with Nebraska Water 2000 Conference

1999 Kentucky River Watershed Watch Data Collection Effort, L. Ormsbee, E. Caudill, G. Epp

Kentucky River Watershed Watch

No abstract provided.

Managing Our Environmental Portfolio, Robert Costanza, Herman E. Daly, Carl Folke, Paul Hawken, C. S. Holling, A. J. Mcmichael, David Pimentel, David Rapport

Institute for Sustainable Solutions Publications and Presentations

No set of issues has tended to separate economists and ecologists, especially in the mind of the public, more than those surrounding the linkages between economic growth, human carrying capacity, and the environment. The general lack of interest among the majority of economists in problems of the environment and a parallel lack of interest among the majority of ecologists in economic issues, combined with a lack of dialogue between the two groups, has allowed extreme positions to take hold in the public debate and to influence policy to an inordinate degree.

Levels Of Synthetic Musks In Municipal Wastewater For Estimating Biota Exposure In Receiving Waters, Lantis Osemwengie

UNLV Theses, Dissertations, Professional Papers, and Capstones

Natural musk (muscone) is a highly prized natural product for use in expensive consumer fragrances. Inexpensive synthetic substitutes have been commercialized over the last 40 years. Two main chemical classes are used commercially — the nitro musks (which fulfilled the original demand for inexpensive fragrance additives for personal care products such as bath soap, body lotions, perfumes, and washing detergents) and the newer polycyclic musks which have musklike smell. The commercial nitro musks include musk ketone, musk moskene, musk ambrette, musk xylene, and musk tibetene. The polycyclics include trade named compounds such as Galaxolide®, Tonalide®, Celestolide®, Traseolide®, Phantolide®, and Cashmeran®, …

Experiment, Thermodynamic Properties And Modeling On Combustion Of Methyl Tert-Butyl Ether : Isobutane And Isobutene And Thermodynamic Properties Of Chloro Alkanes And Alkenes, Chiung-Ju Chen

Dissertations

The reaction systems: methyl tert-butyl ether (MTBE) unimolecular decomposition, MTBE radicals + O₂, tert-butyl radical +O₂, isobutene + HOO. (HO₂),isobutene + OH, sobutene-OH adducts + O₂, and allylic isobutenyl radical + O₂, are important systems in the understanding the oxidation chemistry of MTBE, tertiary butyl radical (C3C.), and sobutene, are analyzed. Thermochemical parameters are determined by ah initio Møller-Plesset (MP2(full)/6-31g(d)), complete basis set model chemistry (CBS-4 and CBS-q with MP2(full)/6-31g(d) and B3LYP/6-31g(d) optimized geometries), density functional (B3LYP/631g(d)), semi-empirical MOPAC (PM3) molecular orbital calculations, and by group additivity estimation. Thermochemical …

Polymer Pyrolysis And Oxidation Studies In A Continuous Feed And Flow Reactor : Cellulose, Polystyrene, And Polyethylene, Byung-Ik Park

Dissertations

A dual zone, continuous feed tubular reactor is developed to assessthe potential for formation of products from incomplete combustion in thermal oxidation of common polymers. Solid polymer powder (cellulose,polystyrene, or polyethylene) is fed continuously into a volatilization oven where it fragments and vaporizes under continuous steady state conditions. The gas phase polymer fragments flow directly into a second, main flow reactor oven and undergo further pyrolysis and oxidation reaction. Temperatures in the main flow reactor are varied independently of the volatilization zone to observe conditions needed to convert the initial polymer fragmentsto CO₂ and H₂O. Combustion products …

To Who Or What Do We Owe Sustainable Development? A Search For An Ethical Framework For Sustainable Development, Mia Soderlund

Theses

This thesis focuses on the ethical dimension of sustainable development as described in the Bruntland report. According to this report, we do have certain moral obligations to future generations. This thesis asks whether traditional moral philosophy, such as utilitarian and contractarian theories, can justify moral obligations to future generations, and if they can serve as ethical frameworks for sustainable development.

The basic idea with sustainable development is to create a balance between society, the environment and the economy. If the environment is ascribed instrumental value, which is the case with traditional moral philosophy then there is no balance, because its …

A Study Of Platinum, Palladium, Bismuth, Copper, And Silver For The Potentiometric Determination Of Chlorine, Maria A. Gottwald

Theses

This research was undertaken to determine which metals would be suitable to be used as electrodes for the determination of the concentration of chlorine in aqueous solutions at various pH levels. Platinum, palladium, bismuth, copper and silver electrodes were constructed and tested to determine their applicability for measuring the concentration of chlorine in drinking water, waste water treatment plant effluent, and swimming pools. Buffer solutions were used which varied in pH from 7 to 8, and in cHorine concentration from 0 to 10 ppm. In addition, the potential variation over time was observed for each electrode in the solutions.

Platinum, …

A Comparison Of Field-Delineated Wetlands To The New Jersey Freshwater Wetland Maps, David P. Moskowitz

Theses

A comparison of the New Jersey Freshwater Wetland maps to field-delineated wetlands was undertaken to assess the accuracy of the Freshwater Wetland maps. The evaluation revealed substantial differences in the amount of wetland acreage on the Freshwater Wetland maps compared to field-verified wetlands. Forty study sites comprising 21,877 acres (8,854h) were evaluated. Of these, twenty-seven were overmapped (more wetland acreage than was field-verified), and thirteen were undermapped. Forty-three percent had mapping discrepancies at or above fifty percent; when modified land designations were included as wetlands, the number of sites at this threshold increased to fifty percent.

Paper copies of the …

A Qualitative Study Of Technology Transfer In Sustainable Green Manufacturing, Susan Muldowney

Theses

The Sustainable Green Manufacturing Project is an initiative of the United States Army to develop environmentally-friendly technologies for Army-designated facilities. In pursuit of this goal, the Army has sought the research capabilities and expertise of outside organizations including the New Jersey Institute of Technology and Concurrent Technologies Corporation. The groups interact and exchange knowledge and tools with each other as well as with potential end users of the green technology. This exchange of knowledge and tools is known as technology transfer.

Researchers and Subject Matter Experts who are working on the SGM Project were interviewed in order to learn about …

Integrated Management Tactics For Predicting And Alleviating Pocket Gopher (Thomomys Spp.) Damage To Conifer Reforestation Plantings, Richard M. Engeman, Gary W. Witmer

United States Department of Agriculture Wildlife Services: Staff Publications

Pocket gophers cause extensive damage to reforestation plantings in the western United States, and pose acute and chronic problems for forest managers. We examine the components of an integrated pest management strategy for reducing pocket gopher damage to conifers: the predictive factors for assessing the risk for damage, techniques for monitoring gopher populations and assessing efficacy of control methods, and damage control strategies and methods. The information in each component is reviewed and presented so that an optimal damage reduction plan can be developed in a logical, cost-effective, environmentally responsible fashion.

Overview Of A Passive Tracking Index For Monitoring Wild Canids And Associated Species, Richard M. Engeman, Lee Allen

United States Department of Agriculture Wildlife Services: Staff Publications

Population density estimates for many animal species are often difficult or expensive to obtain, and they rely on assumptions that, if violated, result in unmeasurable estimation errors. Density estimates also may be unnecessary for research or management purposes, because an index that tracks changes in a population within appropriate time and geographic constraints could provide the information necessary to make management decisions or to evaluate the impact of a control program. We review research on a passive tracking index where observations are made on a series of tracking plots placed on lightly used dirt roads. The number of sets of …

Standardizing The Evaluation Of Brown Tree Snake Trap Designs, Richard M. Engeman, Daniel S. Vice

United States Department of Agriculture Wildlife Services: Staff Publications

The introduced brown tree snake has had devastating impacts on the native vertebrate fauna of Guam. Trapping is the primary means by which brown tree snakes are removed, either in support of reintroduction of endangered species or to deter their movement from Guam in cargo. Traps used to control brown tree snake populations have been continually evolving since the 1980s. Before general operational implementation of a new design, the efficacy of new trap developments must be demonstrated. In this paper we combine the current knowledge about brown tree snake control objectives and practicalities, the information gained from a variety of …

A New High-Resolution Geomagnetic Relative Paleointensity Record For The North American Holocene: A Comparison Of Sedimentary And Absolute Intensity Data, Stefanie A. Brachfeld, Subir K. Banerjee

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

A new high-resolution paleointensity record for North America has been constructed using Holocene sediments from Lake Pepin, Minnesota. Lake Pepin sediments yield the same Holocene paleosecular variation curve as nearby Lake St. Croix and satisfy all of the criteria recommended for paleointensity studies. Absolute paleointensity data for North America recorded by Holocene volcanic and archeomagnetic samples provide an independent record of geomagnetic field paleointensity against which the relative intensity records from Lake Pepin and Lake St. Croix can be compared. Since the absolute field paleointensity is known a priori, the effects of the magnetic recording assemblage can be isolated. Anhysteretic …

Brown Tree Snake Discoveries During Detector Dog Inspections Following Supertyphoon Paka, Daniel S. Vice, Richard M. Engeman

United States Department of Agriculture Wildlife Services: Staff Publications

Detector dog inspection of outbound cargo is one of several control methods applied to deter brown tree snake dispersal from Guam. In the two and a half months following the passage of Supertyphoon Paka over Guam, an increase in brown tree snake discoveries during detector dog inspections was observed. We report here on the circumstances of those discoveries and their management implications.

Land Use Patterns In Relation To Lake Water Quality In The Lake Wesserunsett Watershed, Problems In Environmental Science Course (Biology 493), Colby College, Colby Environmental Assessment Team, Colby College

Colby College Watershed Study: Other Area Studies

The Colby Environmental Assessment Team (CEAT) engaged in an extensive data collection and analysis effort from September to December of 2000 to produce a comprehensive evaluation of the ecological health of the Lake Wesserunsett ecosystem. CEAT examined several factors related to lake water quality, including land use within the watershed, the impacts of residential and commercial development, and physical and chemical measurements of the lake itself. Lake water quality was the primary focus of the study due to its predictive value regarding overall watershed function and viability. The accumulation of nutrients in a lake due to surface runoff and erosion …

Forestry's Role In Sustainable Agriculture, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Determination Of Drag Properties Of A Shelterbelt From Measurements And A Numerical Model, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Pressure Perturbations Around Shelterbelts: Measurements And Model Results, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Windbreaks An Old System With A New Look, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.