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Articles 2641 - 2670 of 6906
Full-Text Articles in Physical Sciences and Mathematics
Using Gis To Delineate Headwater Stream Origins In The Appalachian Coal-Belt Region Of Kentucky, Jonathan A. Villines
Using Gis To Delineate Headwater Stream Origins In The Appalachian Coal-Belt Region Of Kentucky, Jonathan A. Villines
Theses and Dissertations--Biosystems and Agricultural Engineering
Human activity such as surface mining can have substantial impacts on the natural environment. Performing a Cumulative Hydrologic Impact Assessment (CHIA) of such impacts on surface water systems requires knowing the location and extent of these impacted streams. The Jurisdictional Determination (JD) of a stream’s protected status under the Clean Water Act (CWA) involves locating and classifying streams according to their flow regime: ephemeral, intermittent, or perennial. Due to their often remote locations and small size, taking a field inventory of headwater streams for surface mining permit applications or permit reviews is challenging. A means of estimating headwater stream location …
Study Of Dieldrin In Coralville Reservoir, Jeremy Smith
Study Of Dieldrin In Coralville Reservoir, Jeremy Smith
Undergraduate Journal of Mathematical Modeling: One + Two
Using existing experimental data taken over a period of roughly 12 years that documents the concentrations of dieldrin levels in the environment and fatty tissue of the fish, we construct a model of the total dieldrin concentration decline. Comparisons between the experimental data and speculative data can be made using calculus and elements of statistics in order to better understand the movement of dieldrin in the reservoir. Because of the potentially harmful exposure effects of dieldrin to humans as well as the environment, it is important to be able to predict when stability has been restored to the ecosystem.
Impact Of Climate Change On Human And Ecological Use Of Karst Groundwater Resources: A Case Study From The Southwestern Usa, George Veni
National Cave and Karst Management Symposium 2013
Climate change models for the arid southwestern USA predict increasing temperatures and declines in precipitation. These changes will have multiple adverse impacts on water and ecological resources and pose diverse challenges on their management. The San Solomon Spring system of west Texas discharges from the western edge of the karstic Edward-Trinity Plateau Aquifer. It consists of six springs in Jeff Davis and Reeves counties, is one of the largest spring groups in the state, and provides water for agricultural use and habitat to two federally listed endangered species and three species proposed for listing. It serves in this paper as …
Fate Of Polybrominated Diphenyl Ethers During Wastewater Treatment Process Producing Reclaimed Water, Kristy Siegel
Fate Of Polybrominated Diphenyl Ethers During Wastewater Treatment Process Producing Reclaimed Water, Kristy Siegel
USF Tampa Graduate Theses and Dissertations
Polybrominated diphenyl ethers (PBDEs), flame retardants, have been applied to consumer goods, such as furniture, electrical devices, textiles, and appliances for decades. Due to their physico-chemical properties, PBDEs are semi-volatile and easily leach off the consumer good during aging, stress, or normal wear and tear of the good. Once airborne, they pose an environmental health threat because they can adsorb onto dust particles, soil, or other particulates that can be inhaled, ingested, or come into contact with the dermal layer. Additionally, PBDEs have a molecular structure similar to other persistent organic pollutants, such as polychlorinated biphenyls and polychlorinated dibenzo-p-dioxins and …
Spatial Distribution Of Nitrogen Oxides, Benzene, Toluene, Ethylbenzene, And Xylenes In Hillsborough County, Florida: An Investigation Of Impacts Of Urban Forests On Ambient Concentrations Of Air Pollutants Associated With Traffic, Jill Sears
USF Tampa Graduate Theses and Dissertations
Urban air pollution is responsible for high levels of morbidity and mortality in exposed populations due to its effects on cardiovascular and respiratory function. Transportation-related air pollutants account for the majority of harmful air pollution in urban areas. Forests are known to reduce air pollution through their ability to facilitate dry deposition and atmospheric gas exchange. This work characterizes the interactions between transportation air pollutants and urban forests in Hillsborough County, Florida. A highly spatially resolved passive air sampling campaign was conducted to characterize local concentrations of nitrogen oxides, benzene, toluene, ethylbenzene, and xylenes (BTEX) in Hillsborough County, Florida. Sampling …
Investigation Of Mercury Use, Release, Deposition, And Exposures In The Tampa Bay Area, Ryan Algernon Michael
Investigation Of Mercury Use, Release, Deposition, And Exposures In The Tampa Bay Area, Ryan Algernon Michael
USF Tampa Graduate Theses and Dissertations
I investigate the links between mercury use, release, deposition, and population exposure in Tampa Bay, with the focus of identifying levers for reducing population mercury exposures. To achieve this, I investigated the trends in mercury use and release by products and processes in the Tampa Bay area using a Material Flow Analysis. Analysis of USEPA National Emissions Inventory data over time (1999 - 2008) identified relevant air source emission categories, and explored and compared state and regional trends in mercury emissions. To understand source contributions to wet deposited mercury in the Tampa Bay area, I analyzed trends in mercury deposition …
Agricultural And Domestic Waste Contamination In Chilibre Panama And Potential Low-Cost Best Managament Practices, Christopher Etienne Weekes
Agricultural And Domestic Waste Contamination In Chilibre Panama And Potential Low-Cost Best Managament Practices, Christopher Etienne Weekes
USF Tampa Graduate Theses and Dissertations
Abstract
Sanitation coverage in the Republic of Panama is 5 to 10 percent below the Millennium Development Goals targets set for the country. Population growth, urbanization, unplanned development and waste mismanagement have resulted in improvised trash sites and waste discharges into river systems that are important components of the biologically diverse natural environment of Panama. The study sought to investigate and estimate the burden of waste from domestic and agricultural sources in three regions of the Chilibre corrigimiento (district). It was hypothesized that the water quality and land cover data would reflect that the most populated region in the study …
A Modeling Investigation Of Human Exposure To Select Traffic-Related Air Pollutants In The Tampa Area: Spatiotemporal Distributions Of Concentrations, Social Distributions Of Exposures, And Impacts Of Urban Design On Both, Haofei Yu
USF Tampa Graduate Theses and Dissertations
Increasing vehicle dependence in the United States has resulted in substantial emissions of traffic-related air pollutants that contribute to the deterioration of urban air quality. Exposure to urban air pollutants trigger a number of public health concerns, including the potential of inequality of exposures and health effects among population subgroups. To better understand the impact of traffic-related pollutants on air quality, exposure, and exposure inequality, modeling methods that can appropriately characterize the spatiotemporally resolved concentration distributions of traffic-related pollutants need to be improved. These modeling methods can then be used to investigate the impacts of urban design and transportation management …
A Question Of Values: Overpopulation And Our Choice Between Procreative Rights And Security-Survival, Megan T. Latta
A Question Of Values: Overpopulation And Our Choice Between Procreative Rights And Security-Survival, Megan T. Latta
CMC Senior Theses
This thesis analyzes the beliefs of population theorist Julian L. Simon through the creation of a harm principle. It specifically analyzes his argument that we value our freedom to choose how many children we want above all other values in the context of overpopulation and environmental destruction. The developed harm principle is meant to give us a method to decide how to balance our personal freedom with our security-survival. I begin with an overview of Simon’s work, as well as an exposition of other prominent population theorists. I then propose a principle that is a utilitarian alternative to John Stuart …
Activities And Achievements: Progress Report 2011-2013, Center For Governance And Sustainability, University Of Massachusetts Boston, Maria Ivanova, Craig Murphy, James Gustave Speth, Christiana Figueres, Alice Odingo
Activities And Achievements: Progress Report 2011-2013, Center For Governance And Sustainability, University Of Massachusetts Boston, Maria Ivanova, Craig Murphy, James Gustave Speth, Christiana Figueres, Alice Odingo
Center for Governance and Sustainability Publications
We joined the University of Massachusetts Boston in the fall of 2010 to develop a new doctoral program in global governance and human security, the first of its kind in the United States. In the spring of 2011, we launched the Center for Governance and Sustainability in an effort to bring academic rigor to real-world policy challenges in environment, development, and sustainability governance.
The Center is housed at the John W. McCormack Graduate School of Policy and Global Studies, which takes pride in offering a world-class interdisciplinary education and engaging in values-driven research, demonstrating a deep commitment to making a …
Evaluating The Roles Of Visual Openness And Edge Effects On Nest-Site Selection And Reproductive Success In Grassland Birds, Alexander C. Keyel, Allan M. Strong, Noah G. Perlut, J. Michael Reed
Evaluating The Roles Of Visual Openness And Edge Effects On Nest-Site Selection And Reproductive Success In Grassland Birds, Alexander C. Keyel, Allan M. Strong, Noah G. Perlut, J. Michael Reed
Environmental Studies Faculty Publications
In some species, habitat edges (ecotones) affect nest-site selection and nesting success. Openness, or how visually open a habitat is, has recently been shown to influence grassland bird density and may affect nest-site selection, possibly by reducing the risk of predation on adults, nests, or both. Because edge and openness are correlated, it is possible that effects of openness have been overlooked or inappropriately ascribed to edge effects. We tested the roles of edges and visual openness in nest-site selection and nesting success of two grassland passerines, the Bobolink (Dolichonyx oryzivorus) and Savannah Sparrow (Passerculus sandwichensis), …
Inorganic Hydrogeochemical Responses To Fires In Wetland Sediments On The Swan Coastal Plain, Western Australia, David Blake
Inorganic Hydrogeochemical Responses To Fires In Wetland Sediments On The Swan Coastal Plain, Western Australia, David Blake
Theses: Doctorates and Masters
In the past decade the wetlands of the Swan Coastal Plain (SCP) region of Western Australia have been subject to increasing fire frequency and intensity. Whilst wetland sediment fires (also known as peat fires) on the SCP are not new phenomena, the increased frequency, duration and extent of combustion have been concomitant with an increase in urbanisation and reduction in average annual rainfall for the region. This has led to a decrease in ground- and surface-water levels which, in turn, has increased the susceptibility of the wetland sediments to ignition and combustion events. Increased wetland fire severity has resulted in …
Input–Output Analysis Of Virtual Water Transfers: Case Study Of California And Illinois, Stanley Mubako
Input–Output Analysis Of Virtual Water Transfers: Case Study Of California And Illinois, Stanley Mubako
Stanley Mubako
No abstract provided.
Recommendations For Integrating Environmental Justice Into The Epa's Research Enterprise
Recommendations For Integrating Environmental Justice Into The Epa's Research Enterprise
Earthea Nance, PhD (Stanford University, 2004)
Dealing With The Uncertainties Of Climate Engineering: Warnings From A Psychological Complex Problem Solving Perspective, Dorothee Amelung, Joachim Funke
Dealing With The Uncertainties Of Climate Engineering: Warnings From A Psychological Complex Problem Solving Perspective, Dorothee Amelung, Joachim Funke
Joachim Funke
Nevada Interagency Volunteer Program: Helping Hands Across Public Lands—Phase Ii: Final Project Report, December 31, 2012, Margaret N. Rees
Nevada Interagency Volunteer Program: Helping Hands Across Public Lands—Phase Ii: Final Project Report, December 31, 2012, Margaret N. Rees
Get Outdoors Nevada
- Maintained a central clearinghouse created for Southern Nevada public lands volunteers, including: ─ an online volunteer data-management application (Volgistics) adopted and customized for the program and populated with 8,500 active and 961 mailing list volunteer records ─ a community outreach Web site that currently averages 8,230 pages viewed per month since July 2007 and has aided in the recruitment of 11,943 volunteers ─ updated website to word press for sustainability ─ branding development and marketing and outreach tool creation
- Updated Standard Operating Procedures (SOPs) for all areas of Interagency Volunteer Program Management—recruitment, training, recognition, retention of volunteers, event planning, and …
Sndo Hector's Helpers Youth Engaging The Community Through Social Media: Annual Progress Report, Period Covering June 1, 2012 - December 31, 2012, Margaret N. Rees
Sndo Hector's Helpers Youth Engaging The Community Through Social Media: Annual Progress Report, Period Covering June 1, 2012 - December 31, 2012, Margaret N. Rees
Anti-littering Programs
The Hector’s Helpers Youth Engaging the Community through Social Media project was designed to develop civic and environmental stewardship skills as students receive training in administering social media accounts (e.g., Facebook, twitter, Youtube). The project is an extension of the Hector’s Helpers program developed through a cooperative agreement and run under the branding of Don’t Trash Nevada. Participants in the project are known as the Social Media Squad (SMS). The following activities were completed:
- Supervision of youth completing the pilot program initiated in an earlier cooperative agreement
- Recruitment of youth to apply for the Social Media Squad
- Training of Social …
Seasonal Dimorphism In The Horny Bills Of Sparrows, Russell Greenberg, Matthew Etterson, Raymond M. Danner
Seasonal Dimorphism In The Horny Bills Of Sparrows, Russell Greenberg, Matthew Etterson, Raymond M. Danner
United States Environmental Protection Agency: Publications
Bill size is often viewed as a species-specific adaptation for feeding, but it sometimes varies between sexes, suggesting that sexual selection or intersexual competition may also be important. Hypotheses to explain sexual dimorphism in avian bill size include divergence in feeding niche or thermoregulatory demands, intrasexual selection based on increased competition among males, or female preference. Birds also show seasonal changes in bill size due to shifts in the balance between growth rate and wear, which may be due to diet or endogenous rhythms in growth. Insight into the function of dimorphism can be gained using the novel approach of …
Rodent Control Problems In Developing Countries, Robert Z. Brown
Rodent Control Problems In Developing Countries, Robert Z. Brown
Dr Robert Brown
None of the so-called developing countries has an adequate rodent control program at present. In only a few of these countries is any rodent control research occurring despite the fact that rodent problems are actually quite serious in many regions and potentially so in others. Expertise, techniques and materials from the developed countries are of limited usefulness because of major differences in rodent species involved, standards for food handling and sanitation, and in the cultural contexts in which rodent control must occur. Trained personnel, both for control work and the basic research needed, are in very short supply. In addition, …
Interactions Of Zooplankton And Phytoplankton With Cyanobacteria, Rebecca Alexander
Interactions Of Zooplankton And Phytoplankton With Cyanobacteria, Rebecca Alexander
School of Natural Resources: Dissertations, Theses, and Student Research
Cyanobacteria are a major concern in Nebraska reservoirs and are capable of producing toxins that can cause skin irritations and gastrointestinal problems, as well as affect the nervous system. It is important to determine the mechanisms that can cause cyanobacteria blooms due to the effect they can have on human health. The interaction of zooplankton and other phytoplankton groups with cyanobacteria is important because there is a biological component in surface waters that should be taken into consideration along with the physical and chemical parameters that have been noted to promote cyanobacteria. For example, zooplankton have the ability to alter …
Logistic Curves, Extraction Costs And Peak Oil, Robert J. Brecha
Logistic Curves, Extraction Costs And Peak Oil, Robert J. Brecha
Physics Faculty Publications
Debates about the possibility of a near-term maximum in world oil production have become increasingly prominent over the past decade, with the focus often being on the quantification of geologically available and technologically recoverable amounts of oil in the ground. Economically, the important parameter is not a physical limit to resources in the ground, but whether market price signals and costs of extraction will indicate the efficiency of extracting conventional or nonconventional resources as opposed to making substitutions over time for other fuels and technologies. We present a hybrid approach to the peak-oil question with two models in which the …
Climate Change And The Spread Of Vector-Borne Infectious Diseases, Courtney B. Reed
Climate Change And The Spread Of Vector-Borne Infectious Diseases, Courtney B. Reed
Social Sciences
No abstract provided.
Restoration Of Biological Soil Crust On Disturbed Gypsiferous Soils In Lake Mead National Recreation Area, Eastern Mojave Desert, Lindsay P. Chiquoine
Restoration Of Biological Soil Crust On Disturbed Gypsiferous Soils In Lake Mead National Recreation Area, Eastern Mojave Desert, Lindsay P. Chiquoine
UNLV Theses, Dissertations, Professional Papers, and Capstones
Biological soil crusts (BSCs) are sensitive to anthropogenic disturbances. Natural recovery takes many years. Active restoration decreases recovery time. Native BSC inocula, which included lichens and mosses, salvaged from gypsiferous soil habitats in Lake Mead National Recreation Area (LMNRA) in the eastern Mojave Desert were stored dry for two years and applied to disturbed soil after a road reconstruction in LMNRA and also used in laboratory experiments to test inoculation technique effectiveness. After 18 months, field results revealed positive relationships between inoculation and the presence of macroscopic BSC cover, cyanobacteria abundance, soil stability, and ammonium concentrations. Chlorophyll fluorescence monitoring of …
Rickettsia Felis In Cat Fleas, Ctenocephalides Felis Parasitizing Opossums, San Bernardino County, California, Kyle F. Abramowicz, J. W. Wekesa, C. N. Nwadike, Maria L. Zambrano, Sandor E. Karpathy, D. Cecil, J. Burns, R. Hu, Marina E. Eremeeva
Rickettsia Felis In Cat Fleas, Ctenocephalides Felis Parasitizing Opossums, San Bernardino County, California, Kyle F. Abramowicz, J. W. Wekesa, C. N. Nwadike, Maria L. Zambrano, Sandor E. Karpathy, D. Cecil, J. Burns, R. Hu, Marina E. Eremeeva
Environmental Health Sciences Faculty Publications
Los Angeles and Orange Counties are known endemic areas for murine typhus in California; however, no recent reports of flea-borne rickettsioses are known from adjacent San Bernardino County. Sixty-five opossums (Didelphis virginiana) were trapped in the suburban residential and industrial zones of the southwestern part of San Bernardino County in 2007. Sixty out of 65 opossums were infested with fleas, primarily cat fleas, Ctenocephalides felis (Bouché, 1835). The flea minimum infection rate with Rickettsia felis was 13.3% in pooled samples and the prevalence was 23.7% in single fleas, with two gltA genotypes detected. In spite of historic records of murine …
Slides: Proposed Statewide Baseline Groundwater Sampling And Monitoring Rules, University Of Colorado Boulder. Natural Resources Law Center, Colorado. Oil And Gas Conservation Commission
Slides: Proposed Statewide Baseline Groundwater Sampling And Monitoring Rules, University Of Colorado Boulder. Natural Resources Law Center, Colorado. Oil And Gas Conservation Commission
Monitoring and Protecting Groundwater During Oil and Gas Development (November 26)
Presenter: Kathryn Mutz, Natural Resources Law Center, University of Colorado Law School
16 slides
Agenda: Monitoring And Protecting Groundwater During Oil And Gas Development, University Of Colorado Boulder. Natural Resources Law Center. Intermountain Oil And Gas Bmp Project, Colorado Water And Energy Research Center
Agenda: Monitoring And Protecting Groundwater During Oil And Gas Development, University Of Colorado Boulder. Natural Resources Law Center. Intermountain Oil And Gas Bmp Project, Colorado Water And Energy Research Center
Monitoring and Protecting Groundwater During Oil and Gas Development (November 26)
This workshop is cosponsored by the Intermountain Oil and Gas BMP Project and the Colorado Water and Energy Research Center, with financial support from the Environmentally Friendly Drilling Project and the CU-Boulder Outreach Committee.
The Colorado Oil and Gas Conservation Commission (COGCC) recently initiated a rule making process to develop new, statewide regulations for baseline sampling and monitoring of groundwater near new oil and gas wells. COGCC’s first rule making hearing was held November 14; the rule is expected to be finalized December 10. This workshop will discuss oil and gas development procedures that can impact groundwater, the current rules …
Slides: Survey Of State Sampling And Monitoring Rules, Kathryn Mutz, Josh Kruger
Slides: Survey Of State Sampling And Monitoring Rules, Kathryn Mutz, Josh Kruger
Monitoring and Protecting Groundwater During Oil and Gas Development (November 26)
Presenters: Kathryn Mutz and Josh Kruger, Natural Resources Law Center, University of Colorado Law School
7 slides
Slides: Routes To Sustainability: Natural Gas Development And Air And Water Resources In The Rocky Mountain Region, Mark Williams
Slides: Routes To Sustainability: Natural Gas Development And Air And Water Resources In The Rocky Mountain Region, Mark Williams
Monitoring and Protecting Groundwater During Oil and Gas Development (November 26)
Presenter: Mark Williams, University of Colorado Boulder
14 slides
Slides: Colorado Law: Protecting Water Quantity And Quality, Alan E. Curtis
Slides: Colorado Law: Protecting Water Quantity And Quality, Alan E. Curtis
Monitoring and Protecting Groundwater During Oil and Gas Development (November 26)
Presenter: Alan E. Curtis, White & Jankowski, LLP
23 slides
Further Information: Monitoring And Protecting Groundwater During Oil And Gas Development, University Of Colorado Boulder. Natural Resources Law Center. Intermountain Oil And Gas Bmp Project, Colorado Water And Energy Research Center
Further Information: Monitoring And Protecting Groundwater During Oil And Gas Development, University Of Colorado Boulder. Natural Resources Law Center. Intermountain Oil And Gas Bmp Project, Colorado Water And Energy Research Center
Monitoring and Protecting Groundwater During Oil and Gas Development (November 26)
1 page.
"For Further Information" (URLs):
COGCC
Rules and Proposed Rules from Other Jurisdictions
Sampling Protocols
Impacts