Dissertations / Theses on the topic 'Salt – Environmental aspects – Ontario'
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Paul, Morrie. "The application of remote sensing in the assessment of pipeline construction and oil spill impacts on farmland in Glengarry County, Ontario /." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65950.
Full textUeckermann, Julius. "Green initiatives in hospitals in Ontario : is there a business case." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/80784.
Full textThis study was conducted to investigate on what basis hospitals in Ontario could justify the capital and resource requirements needed to implement green initiatives. The study used two theoretical references as the basis for the literature review as well as for the interpretation of the results. The one reference used was a report released by the World Health Organization (WHO) and Health Care Without Harm (HCWH) in 2009, that addressed the responsibility of hospitals towards reducing greenhouse gas emissions. The second reference looked at a theoretical model that discussed four potential competitive environmental strategies that businesses can use to differentiate themselves based on green initiatives. The literature review more specifically discussed the seven opportunities that were identified by the WHO and HCWH that hospitals can use to reduce their carbon footprint. These were: (1) energy efficiency; (2) built environment; (3) alternative energy; (4) transportation; (5) waste; (6) water; and (7) food. Each opportunity was discussed in detail and was evaluated in both a competitive and non-competitive environment. In addition, each opportunity was evaluated in light of its ability to be used in one of the competitive environmental sustainability strategies. In order to assess what the regulatory pressures are on Ontario hospitals, the Canadian Environmental Protection Act was evaluated. No major environmental legislative pressures on hospitals could be identified. Another important part of the literature review was the evaluation of the funding model for Ontario hospitals. It was seen, that hospitals in Ontario received around 85 percent of their funding from the Ontario government and that hospitals and the ministry are both under financial pressure. This is an important indicator that funding to hospitals is very restricted. The research data for this study was obtained through a survey that was conducted among hospital representatives who have already implemented some form of green initiatives. The results from 33 questionnaires indicated that hospitals primarily implemented green initiatives to obtain cost savings. In this regard, an eco-efficiency strategy would be a logical competitive strategy for Ontario hospitals to follow. This is a clear indication that green initiatives are seen more as a cost reduction tool than a direct attempt to reduce greenhouse gas emissions. Projects that are quick to implement, require low capital and have a quick payback, are favoured. The areas on which hospitals have focused, were energy efficiency, waste management and water savings. In general, it seems that most green initiative projects were still in an immature stage. Further results also showed that hospitals had no opportunity to increase revenue by making use of the benefits of green initiative projects. The research concluded that the only basis on which Ontario hospitals could justify the capital and resource required to implement green initiatives, were on a cost savings basis. This report concludes with a discussion on the use of certain competitive strategies in a non-competitive environment before recommendations are made on how to improve the current situation. The study concludes with shortcomings of this study and recommendations on further research to be done.
Branfireun, Marnie. "The role of decomposing plant litter in methylmercury cycling in a boreal poor fen /." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33382.
Full textMass losses follow the trend: Chamaedaphne calyculata >> S. angustifolium > S. fuscum. Between species differences were far more significant than differences between locations or depths, indicating that litter quality is the major control on decomposition.
McHg concentrations generally increased during decomposition, particularly near the water table: for C. calyculata up to 13000%, for the two Sphagnum mosses up to 500%, suggesting that decomposition stimulates mercury methylation or McHg scavenging.
The discovery of a high McHg substance on C. calyculata leaf surfaces (25 ng g-1) suggests that much plant MeHg data may by skewed by the presence of a biologically active 'film'.
Sauer, Robert Eugene Jr. "Development and use of saltmarsh mesocosms in studies of sedimentary mercury transformation." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/19608.
Full textShaw, Gregory Alan. "Rehabilitation of the Orange River Mouth Salt Marsh : seed, wind and sediment characteristics." Thesis, Nelson Mandela Metropolitan University, 2007. http://hdl.handle.net/10948/603.
Full textBlackburn, Lynda G. "Quantification and estimation of nitrous oxide emissions from dairy manure applications in a western Quebec pea-forage and an eastern Ontario alfalfa-forage cropping system : by Lynda G. Blackburn." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100771.
Full textGrowing season N2O emissions averaged 0.5 to 5 mg N2 O-N m-2 d-1 with peaks following snow melt (between 5 and 8 mg N2O-N m-2 d-1) and manure applications (8 to 37 mg N2O-N m-2 d -1). Although generally small (<0.25 mg N2O-N m -2 d-1), emissions were detectable during the fall and winter, indicating the importance of including them in annual emission totals.
The measurements were used to verify the performance of the simulation model DNDC (DeNitrification-DeComposition) in estimating N2O emissions from legumes and in response to dairy manure application. Sensitivity tests were also carried out in which baseline input values were modified. Results suggest that the current model version (DNDC8.9) requires further modification prior to application for estimating greenhouse gas emissions in national accounting systems.
Patterson, Tai Zachary. "Freight shipper mode choice in the Quebec City-Windsor Corridor and its impact on carbon dioxide emissions." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102823.
Full textThis thesis provides background on the freight transportation-GHG nexus in Canada and describes the development, implementation, reasoning behind, and results of, a Stated Preference shipper carrier choice survey for the Quebec City - Windsor corridor conducted during the fall of 2005. It then describes how the resulting carrier choice models are used to estimate the potential to displace truck traffic to rail (premium-intermodal) under current conditions, as well as to test the effectiveness of different possible future policy or service offering scenarios.
The results show that premium-intermodal has the potential to capture a substantial share of traffic between the main destinations in the Quebec City - Windsor Corridor. However, its ability to contribute significantly to reducing CO2 emissions is limited. According to the analyses conducted, potential reductions are considered to be in the range of nil to 0.413 Mt---a fraction of what the federal government was hoping to be able to achieve through "further public-private collaboration to promote the use of intermodal freight opportunities and to increase the use of low-emission vehicles and modes" (Government of Canada 2002).
At the same time, these potential reductions are based on a small proportion of total truck-related emissions and a few city-pairs. Extension of the current analysis to more city-pairs separated by longer distances might arrive at different conclusions.
Sibley, Samuel D. Jr. "The Impact of Salt Marsh Hydrogeology on Dissolved Uranium." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7262.
Full textMudumbi, John-Baptist Nzukizi. "Perfluorooctane sulfonate and perfluorooctanoate contamination of riparian wetlands of the Eerste, Diep and Salt Rivers." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/2017.
Full textPerfluorinated compounds (PFCs), in particular perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) have been found in aquatic environments throughout the world. Recent studies have reported that owing to their bioaccumulative nature, PFCs may also be present in various water sources, resulting in human and wild-life exposure. Although, these PFCs usually occur at low concentration levels, their presence in the environment has nevertheless been a concern in both developed and developing countries, since water remains an important natural resource for most living species. Water and sediment from rivers are one of the matrices in which PFC contamination is studied, since rivers receive water from various sources. However, limited studies have been conducted in South Africa on PFC contamination of river water and sediments. Although PFCs are sometimes unintentionally released into the environment, the concentration and type of PFCs that contaminate water sources vary among countries and depend on the types of industry releasing them into the environment, suggesting that PFC contamination patterns can be expected to differ from country to country, with PFOA and PFOS being the predominant perfluorinated contaminants. The aim of this study was therefore to determine the concentration of PFOS and PFOA in riparian wetlands of the Western Cape, focusing on the Eerste, Diep and Salt rivers, which are the primary rivers in the largest catchment areas of the Western Cape, South Africa.
Wartena, Ryan Craig. "Generation of sodium oxide and discharge of carbon by the electrolysis of multi-component molten salt systems : a recycle process for kraft pulping chemicals." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/10281.
Full textMartin, Alicia. "The Socio-Environmental Aspects of Students’ Food Literacy: An Exploratory Case Study of Two Ontarian High Schools." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37320.
Full textCuthbert, Iain Dawson. "Predicting the riverine concentrations and catchment exports of metals in rural drainage basins of Ontario and Québec." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60672.
Full textModels such as these can be used both to estimate catchment exports of metals to lakes, and to estimate riverine metal concentrations without requiring chemical analyses. The models also serve to distinguish background levels from those indicating metal contamination, and will, therefore, be useful in design of water quality guidelines.
Raffel, Ann Eileen. "Methyl Halide Production by Calcareous Periphyton Mats from the Florida Everglades." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/1524.
Full textWettasinghe, Asoka. "Environmental behavior of Dacthal." Thesis, 1991. http://hdl.handle.net/1957/36972.
Full textGraduation date: 1992
Ko, Lih-jong. "Factors influencing the atmospheric aerosol composition at two sites in western Oregon." Thesis, 1992. http://hdl.handle.net/1957/28977.
Full textGraduation date: 1993
Bell, Justin Robert William Civil & Environmental Engineering Faculty of Engineering UNSW. "Cyclic deposition of salt-laden dusts as an explanation of salinisation in a groundwater recharge zone Coleambally irrigation area Riverine plain NSW." 2007. http://handle.unsw.edu.au/1959.4/40549.
Full textHillwalker, Wendy E. "Selenium and trace metal accumulation in detrital-benthic food webs of lotic and lentic wetlands, Utah, USA." Thesis, 2004. http://hdl.handle.net/1957/29920.
Full textGraduation date: 2005
Martin, Katherine Clare. "Interactive effects of salinity and nutrients on mangrove physiology : implications for mangrove forest structure and function." Phd thesis, 2007. http://hdl.handle.net/1885/149911.
Full text