Browsing Earth and Environmental Sciences by Title
Now showing items 214-233 of 434
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An Investigation into Water Consumption Data Using Parametric Probability Density Functions
(University of Waterloo, 2018-08-07)Many datasets can be expressed through the usage of frequency-based histograms that provide compact visualizations of large volumes of data. A motivating hypothesis of this work is that the relative frequency of measurements ... -
Investigation of Gas Transport Rates Through a Covered Waste Rock Pile and Synchrotron Studies on the Sulfide Oxidation Reaction
(University of Waterloo, 2017-01-19)This thesis presents a field based investigation into gas transport mechanisms and rates through a waste-rock pile with a low permeable cover, and a synchrotron based study into intermediate sulfidic species that are ... -
An Investigation of Heterogeneity and the Impact of Acidic Regions on Bulk Effluent from a Deconstructed Low Sulfide Waste-Rock Pile
(University of Waterloo, 2017-05-15)Waste rock is a potential source of low quality drainage resulting from oxidation of naturally occurring sulfide minerals. Sulfide oxidation may result in the generation of effluent with elevated concentrations of SO4 and ... -
Investigation of Pharmaceutical Compounds in Landfill and Septic System Plumes
(University of Waterloo, 2008-11-21)Two municipal landfills and one public septic system in Southern Ontario were studied as potential sources of the pharmaceuticals ibuprofen, carbamazepine, gemfibrozil, caffeine, sulfamethoxazole, and naproxen to groundwater. ... -
Investigation of the Efficacy of in situ Degradation Methods for Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonic Acid (PFOS) in Groundwater
(University of Waterloo, 2018-01-17)Per- and polyfluoroalkyl substances (PFASs) are a group of emerging contaminants that include perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS). PFASs can be released into groundwater through the ... -
Investigations into Cellulolysis in Carbon Amended Tailings
(University of Waterloo, 2011-05-24)Modified cellulase enzyme assay methods were developed to determine the potential of using enzyme activities to evaluate the decomposition of organic matter in carbon amended mine tailings systems. Cellulase assays are ... -
Iron isotope fractionation in sediments of an oligotrophic freshwater lake
(University of Waterloo, 2015-10-06)In situ iron (Fe) isotope compositions of pore water and solid-bound Fe phases were measured in sediments of an oligotrophic, sulfate-poor freshwater lake (Lake Tantaré, Québec, Canada). Previous work has shown that ... -
Iron Isotope Fractionations Reveal a Finite Bioavailable Fe Pool for Structural Fe(III) Reduction in Nontronite
(American Chemical Society, 2017-08-16)We report on stable Fe isotope fractionation during microbial and chemical reduction of structural Fe(III) in nontronite NAu-1. Fe-56/Fe-54 fractionation factors between aqueous Fe(II) and structural Fe(III) ranged from ... -
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 ... -
Isotope-Inferred Water Balance of Slave River Delta Lakes, NWT, Canada.
(University of Waterloo, 2007-09-27)The use of the stable isotopes, 18O and 2H, has proven to be a valuable tool in determining the importance of various hydrological controls on the modern water balances of Slave River Delta lakes, NWT, Canada. Samples ... -
Land use changes and salinization: Impacts on lake phosphorus cycling and water quality
(University of Waterloo, 2023-09-05)Over the past few decades, there has been a rapid global increase in urbanization accompanied by the conversion of natural or agricultural land into more impervious land cover. This ongoing acceleration of global urbanization ... -
Landslide damming in Western Sichuan Province, China, with special reference to the 1786 Dadu River and 1933 Diexi events
(University of Waterloo, 2015-08-04)Landslides and landslide damming events can be triggered by various processes, and they can also cause catastrophic damage. With the help of historical documents and Geographic Information System (GIS), historical landslide ... -
Landslide Hazard and Climate Change in the Mountain Glacial Environment of Northwest North America
(University of Waterloo, 2017-09-21)The aim of this thesis was to improve the understanding of the complex interactions between climate change and landslide behavior in the periglacial mountain environment of northwest North America. In particular, this ... -
Landslides triggered by the 1946 Ancash Earthquake (Peru) and geologic controls on the mechanisms of initial rock slope failure
(University of Waterloo, 2009-01-22)The 1946 M7.3 Ancash earthquake triggered a large number of landslides in an epicentral area along the continental divide in the Andes of Peru. Reconnaissance reports by Silgado (1947, 1951), Heim (1949) and Rüegg (1950) ... -
LASS-ICP-MS collection of trace element and 87Sr/86Sr isotope data using a novel uneven distribution of sample material for otolith microchemistry
(University of Waterloo, 2022-01-26)Understanding the behaviour and movement of fish populations is crucial to developing plans to properly manage fisheries, and to predict effects of ongoing environmental change. In northern regions, physically tracking ... -
The Late Proterozoic to Palaeozoic Tectonic Evolution of the Long Range Mountains in Southwestern Newfoundland
(University of Waterloo, 2007-04-04)Ever since the first plate-tectonic model for the Appalachians was proposed, the Laurentian margin has been interpreted as having experienced a collision-related dynamo-thermal event during the Middle Ordovician Taconic ... -
Laurentide Ice Sheet dynamics evolution in the inner-ice sheet region of northeastern Quebec, Canada
(University of Waterloo, 2020-05-06)The study of past ice sheets, such as the Laurentide Ice Sheet (LIS), which covered most of northern North America during the last glaciation (last ~100-kyr), provides critical knowledge about the long-term behaviour of ... -
Learning about Ontario's Paleozoic Geology with Virtual Reality Google Expedition Tours
(2020-02)How well can you interpret or place into context the different geological features or rock types that are exposed along roadways, rivers, coastlines or construction sites? Here in the Department of Earth and Environmental ... -
A Least-Cost Strategy for Evaluating a Brownfields Redevelopment Project Subject to Indoor Air Exposure Regulations
(University of Waterloo, 2012-08-31)Over the course of the past several decades the benefits of redeveloping brownfields have been widely recognized. Actions have been taken to foster sustainable redevelopment of brownfields by government, policy makers and ... -
Linking soil moisture content and carbon dioxide fluxes: From batch experiments to process-based modelling
(University of Waterloo, 2020-02-19)The emissions of carbon dioxide (CO2) from soil to the atmosphere represent a major flux within the global carbon cycle. Soil CO2 fluxes depend on environmental factors including soil moisture and oxygen, and on intrinsic ...