Browsing Earth and Environmental Sciences by Issue Date
Now showing items 21-40 of 434
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The Silurian Amabel and Guelph formations of the Bruce Peninsula: insights into stratigraphy and diagenesis from petrography and ground-penetrating radar
(University of Waterloo, 2006)Regional study of the Silurian Amabel and Guelph (including the Eramosa Member) formations in the subsurface on the Bruce Peninsula provides petrographic details of these pervasively dolomitized rocks, defines lithofacies ... -
Evaluation of Geochemical and Reactivity Changes of Different Iron Materials
(University of Waterloo, 2006)Previous studies have suggested that iron PRBs, receiving high concentrations of inorganic constituents in groundwater, may experience passivation because of the accumulation of inorganic precipitates. In an iron PRB ... -
Seismic Coupling and Hydrological Responses
(University of Waterloo, 2006)In seismology, the capability of an earthquake to induce other seismic events has been widely accepted for decades. For example, the term aftershock involves a strong relation of such a seismic event with the incidence ... -
Integrated Solid Phase, Aqueous Phase and Numerical Investigation of Plume Geochemistry at an Oil Sand Mining Facility
(University of Waterloo, 2006)A plume of process-affected groundwater was identified in a shallow sand aquifer adjacent to a tailings impoundment at Syncrude Canada Ltd. Quantitative and qualitative Naphthenic Acid (NA) analyses were performed on ... -
Impact of the Wisconsinian Glaciation on Canadian Continental Groundwater Flow
(University of Waterloo, 2007-01-19)During the Quaternary period, cyclic glaciations have occurred over a global scale as the result of a climatic variability that affected the Earth's atmospheric, oceanic and glacial systems. Quaternary glaciations and their ... -
Field-Scale Evaluation of Enhanced Agricultural Management Practices Using a Novel Unsaturated Zone Nitrate Mass Load Approach
(University of Waterloo, 2007-01-23)The monitoring of nitrate mass load through the unsaturated zone below agricultural land was proposed as a novel technique to assess the effect of agricultural best management practices (BMPs). The objectives of the study ... -
Behaviour of Oxygenates and Aromatic Hydrocarbons in Groundwater from Gasoline Residuals
(University of Waterloo, 2007-01-23)ABSTRACT This study focuses on the dissolution and near-source attenuation of oxygenated gasoline hydrocarbons in groundwater from two gasoline residual sources: one containing gasoline with 9.8% methyl tert butyl alcohol ... -
Reservoir Geomechanics and Casing Stability, X1-3Area, Daqing Oilfield
(University of Waterloo, 2007-01-24)It is widely understood that injection and production activities can induce additional stress fields that will couple with the in situ stress field. An increased shear stress may cause serious casing stability issue, and ... -
Field Trial of Residual LNAPL Recovery Using CO2-Supersaturated Water Injection in the Borden Aquifer
(University of Waterloo, 2007-01-24)The ability of supersaturated water injection (SWI) to recover non-aqueous phase liquids (NAPLs) was studied at the field scale as part of an ongoing program to evaluate its applicability to groundwater remediation. SWI ... -
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 ... -
Potential and Limitations of MCM-41 in Dechlorination Reactions
(University of Waterloo, 2007-04-27)The purpose of this thesis was to conduct preliminary research into the feasibility of using MCM-41 as a catalyst support material in the treatment of organochloride contaminated water. Specifically, the stability of MCM-41 ... -
A Device for Measuring Groundwater Velocity in the Capillary Fringe
(University of Waterloo, 2007-05-22)Groundwater flow in the capillary fringe is rarely measured during hydrogeological studies because of the difficulties associated with investigating this region. Previous research using a point velocity probe (PVP) to ... -
Influence of Sulphide on the Degradation Pathways for Chlorinated Ethenes
(University of Waterloo, 2007-05-22)Although iron-based permeable reactive barriers are gaining importance in the treatment of groundwater contaminants, there have been field observations indicating that sulphide may affect the degradation rates of certain ... -
Assessing hydrological processes controlling the water balance of lakes in the Peace-Athabasca Delta, Alberta, Canada using water isotope tracers
(University of Waterloo, 2007-05-22)One of the world’s largest freshwater deltas (~4000 km2), the Peace-Athabasca Delta (PAD), is located at the convergence of the Peace and Athabasca rivers and Lake Athabasca in northern Alberta, Canada. Since the early ... -
Degradation of Chlorinated Butenes and Butadienes by Granular Iron
(University of Waterloo, 2007-09-18)Sites where 2-chlorobutadiene-1,3 (chloroprene) and 2,3-dichlorobutadiene-1,3 (DCBD) are synthesized for use in chlorobutyl rubber have the potential to release a mixture of at least five chlorinated butenes and butadienes ... -
Behaviour and Treatment of Nitroaromatics in Groundwater
(University of Waterloo, 2007-09-25)The purpose of this study was to determine the chemical and/or biological factors that cause 2,4-dinitrotoluene (2,4-DNT), 2,6-dinitrotoluene (2,6-DNT) and nitrobenzene (NB) to transform to their respective aromatic amines ... -
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 ... -
Use of Drains for Passive Control of Flow Through a Permeable Reactive Barrier
(University of Waterloo, 2007-09-28)Abstract Permeable reactive barrier technology is a cost effective means of treating near surface groundwater contaminant plumes. However, current reactive barrier technology lacks the capacity to manipulate flow rates ... -
Long-Term Fate of an Emplaced Coal Tar Creosote Source
(University of Waterloo, 2007-10-09)An emplaced source of coal tar creosote within the sandy Borden research aquifer has provided an opportunity to document the long term (5140 days) natural attenuation for this complex mixture. Plumes of dissolved chemicals ... -
Remediation of Pentaerythritol Tetranitrate (PETN) Contaminated Water and Soil
(University of Waterloo, 2007-11-28)Pentaerythritol tetranitrate (PETN), a nitrate ester, is widely used as a powerful explosive and is classified as a munitions constituent of great concern by DoD in U.S.A. It is an environmental concern and poses a threat ...