Browsing Earth and Environmental Sciences by Issue Date
Now showing items 81-100 of 434
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An Integrated Approach to Paleo-Ice Stream Determination in Mid Continental Prairies, Saskatchewan, Canada
(University of Waterloo, 2009-10-02)Ice stream research has gained momentum in the last decade due to the increased need to understand ice sheet dynamics and instability and, by extension, the role ice streams have on climate change and sea level rise. ... -
Impacts of Ethanol in Gasoline on Subsurface Contamination
(University of Waterloo, 2009-10-09)The increasing use of ethanol as a gasoline additive has raised concerns over the potential impacts ethanol might have on groundwater contamination. In North America, 10% ethanol is commonly being added to gasoline (termed ... -
Passive In Situ Treatment of Acidic and Neutral Mine Drainage: Field and Laboratory Investigations
(University of Waterloo, 2009-12-16)Water quality degradation is the foremost environmental issue faced by the mining industry. Negative impacts on water quality are commonly associated with unmitigated drainage emanating from sulfide-bearing mine waste ... -
A Multi-Scale Approach in Mapping the Sedimentological and Hydrostratigraphical Features of Complex Aquifers
(University of Waterloo, 2009-12-22)Accessibility to consistent subsurface hydrostratigraphic information is crucial for the development of robust groundwater flow and contaminant transport models. However, full three-dimensional understanding of the ... -
The use of stable carbon and oxygen isotopes to examine the fate of dissolved organic matter in two small, oligotrophic Canadian Shield lakes.
(University of Waterloo, 2010-02-12)Allochthonous carbon can be a large proportion of the carbon budget in northern temperate and boreal lakes. This thesis uses stable carbon and oxygen isotopes to examine the fate of allochthonous dissolved organic matter ... -
Stimulating In Situ Denitrification in an Aerobic, Highly Conductive Municipal Drinking Water Aquifer
(University of Waterloo, 2010-04-14)Best or beneficial management practices (BMPs) are often relied upon as a mitigation strategy for nitrate contamination throughout Canada. At a regional scale, reducing the quantity of nutrients applied to agricultural ... -
Development of a New Technique to Study the Kinetics of Hydroxyl Radical Uptake on Micron-Sized Organic Aerosols
(University of Waterloo, 2010-04-28)The importance of the hydroxyl radical (OH) to tropospheric chemistry is well known. The radicals’ ability to react with most atmospheric trace gases allows it to act as the main removal mechanism for these gases. Due to ... -
Quantification of Oxygen Dynamics in the Grand River Using a Stable Isotope Approach
(University of Waterloo, 2010-04-30)The current study monitored DO, stable isotopes of O2 (δ18O-O2 and δ18O-H2O) along with water quality parameters on both a diel and day-time only basis in the Grand River over several seasons and locations. A dynamic dual ... -
Modelling the Effects of Climate Change on the Surface and Subsurface Hydrology of the Grand River Watershed
(University of Waterloo, 2010-05-06)A numerical modelling analysis of climate change’s precipitation effects on the long-term, averaged surface and subsurface hydrology of the Grand River Watershed (GRW) was undertaken in order to assess possible areas of ... -
A Geochemical Study of the Mineralization at the Hopper Property, Yukon: A Case Study of an Atypical Copper Occurrence
(University of Waterloo, 2010-07-19)The Hopper property is located in the Yukon Tanana terrane in the southwestern Yukon. It is characterized by granodiorite-hosted copper and molybdenum mineralization that is related to propylitic alteration and shearing. ... -
Isotope hydrology and paleohydrology of the Slave River Delta, NWT
(University of Waterloo, 2010-08-30)Water isotope tracers and multi-proxy paleolimnological approaches are used to characterize the present and past hydrology of the Slave River Delta (SRD), NWT. This research addresses crucial gaps in knowledge about the ... -
Structural Geology and Geochronology of the Bernic Lake Area in the Bird River Greenstone Belt, Manitoba: Evidence for Syn-Deformational Emplacement of the Bernic Lake Pegmatite Group
(University of Waterloo, 2010-08-31)The Bernic Lake Formation in the Bird River greenstone belt consists dominantly of mafic to felsic arc volcanic and volcaniclastic rocks, with varying amounts of mafic to felsic intrusive rocks, including the Bernic Lake ... -
Site Investigation and Modelling of DNAPL Migration in a Fractured-Porous Media
(University of Waterloo, 2010-09-01)The present work is in the area of site and computational investigations dealing with migration of a dense non-aqueous phase liquid (DNAPL) within a discrete fractures network embedded in a porous rock media at field scale ... -
The Effect of Volatiles (H2O, Cl and CO2) on the Solubility and Partitioning of Platinum and Iridium in Fluid-Melt Systems
(University of Waterloo, 2010-09-01)Volatiles are a fundamental component of the Magmatic-Hydrothermal model of platinum group element (PGE) ore deposition for PGE deposits in layered mafic intrusions such as Bushveld and Stillwater. Volatiles have the ... -
The Developmental History of a Cupriferous Swamp in Southeastern New Brunswick, Canada
(University of Waterloo, 2010-09-30)Cupriferous swamps are characterized by high concentrations of copper in the soil and water. The Aboushagan swamp, situated 8km northwest of Sackville, New Brunswick is a unique metalliferous wetland where copper is ... -
Performance of Treatment Media for the Stabilization of Mercury under Variable Geochemical Conditions
(University of Waterloo, 2010-10-01)Mercury-contaminated sediments are found in many locations throughout North America and the world. Release of Hg from such sediments and subsequent biological uptake can result in biomagnification in associated ecosystems. ... -
Use of N2O and its Isotopic Composition to Investigate Nitrogen Processes in Groundwater
(University of Waterloo, 2010-10-01)This study explores the use of N2O and its isotopic composition to investigate nitrogen processes in groundwater aquifers. Groundwater sampling was undertaken in 2008-2009 at two septic system sites (Long Point site and ... -
Characterizing low-sulfide instrumented waste-rock piles: image grain-size analysis and wind-induced gas transport
(University of Waterloo, 2011-01-18)This study is part of the Diavik Waste-Rock Pile Project taking place at the Diavik Diamond Mine in the Northwest Territories, Canada. The project involves the construction of three 15m-scale low sulfide test waste-rock ... -
Meso – and Neoarchean tectonic evolution of the northwestern Superior Province: Insights from a U-Pb geochronology, Nd isotope, and geochemistry study of the Island Lake greenstone belt, Northeastern Manitoba
(University of Waterloo, 2011-01-21)What tectonic processes were operating in the Archean, and whether they were similar to the “modern-style” plate tectonics seen operating today, is a fundamental question about Archean geology. The Superior Province is the ... -
Application of Stable Isotope Geochemistry to Assess TCE Biodegradation and Natural Attenuation in a Fractured Dolostone Bedrock
(University of Waterloo, 2011-01-24)Isotopic methods have been developed over the last 10 years as a method for determining chemical interactions of chlorinated solvents. These methods are especially promising for. This study attempts to employ and develop ...