Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"environmental tracers"”.
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Development of Environmental Tracers for Sediments and Phosphorus.
… transport processes. A large range of sediment tracers exists; however, to date there has been no combined use of tracers which represent the full particle size range of sediments transported in overland flow. This is relevant because particles of different sizes show differing transport …
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Environmental tracers in groundwater as tools to study hydrological questions in arid regions
In der vorliegenden Arbeit werden Umwelttracer wie Edelgase, stabile Isotope, Tritium und SF6 verwendet um hydrologische Fragen in ariden Regionen zu studieren. Theoretische Modelle und numerische Methoden zur Behandlung des Phänomens von Luftüberschüssen in Grundwasser werden diskutiert. Das …
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Development and application of novel tracers for environmental applications.
Novel glass tracers, organic and inorganic polymers based on narrow band atomic fluorescence, have been developed for deployment as environmental tracers. The use of discrete fluorescent species in an environmentally stable host has been investigated to replace existing toxic, broad band molecular …
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Geoforensic tracing of contaminants and emissions: Monitoring watersheds, petroleum, and helium operations
Climate change and environmental pollution is consistently ranked as one of the greatest global catastrophic risks of this generation. Not only are there an incredible number of pollutants to monitor, but this threat also exacerbates widespread issues regarding food safety, water contamination, and …
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Ground water - surface water interactions in the lower Virgin River area, Arizona and Nevada
… Nevada, using stable isotopes and major ions as environmental tracers. The study reach starts at the Virgin River Gorge in Arizona and terminates at Lake Mead in Nevada, 80 km downstream. Discharge data showed that major sources of water for the lower Virgin River were discharge from the upper …
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Insight into chemical, biological, and physical processes in coastal waters from dissolved oxygen and inert gas tracers
… access to use dissolved noble gases as environmental tracers. Second, I measured O2 and five noble gases during a cruise in Monterey Bay, California. I developed a vertical model and found that accurately parameterizing bubble-mediated gas exchange was necessary to accurately simulate …
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On the scope and assessment of pesticides in groundwater in Skåne, Sweden
… flow pathways), and groundwater turnover rates. Environmental tracers show great potential as tools for simple but effective calibration of transport models and for deciphering pollution trends and patterns. However, there are certain tracer-specific complications in need of further attention for …
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Lead isotopes as a palaeodietary tracer in southwestern South Africa
… and sulphur (S), are widely used as (palaeo) environmental tracers, but do not yield information on the geological substrates on which individuals have lived. Sr isotopes in bones and teeth are useful in distinguishing between areas of distinct bedrock geology, however, the efficiency of Sr is …
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Insight into chemical, biological, and physical processes in coastal waters from dissolved oxygen and inert gas tracers
… access to use dissolved noble gases as environmental tracers. Second, I measured O₂ and five noble gases during a cruise in Monterey Bay, California. I developed a vertical model and found that accurately parameterizing bubble-mediated gas exchange was necessary to accurately simulate …
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Investigating the role of groundwater - surface water connectivity in supporting non-perennial river systems, Sandveld, Western Cape, South Africa
… review and in-field sampling of water for environmental tracers, a water presence, groundwater level, and geophysical survey was conducted in order to develop a conceptual understanding of the multi-scale interaction occurring within the Verlorenvlei basin. Results of the isotopic and …