Browsing Earth and Environmental Sciences by Subject "groundwater"
Now showing items 1-20 of 24
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An approach to improve direct runoff estimates and reduce uncertainty in the calculated groundwater component in water balances of large lakes
(Journal of Hydrology, 2015-10-30)Groundwater is important in the overall water budget of a lake because it affects the quantity and quality of surface water and the ecological health of the lake. The water balance equation is frequently used to estimate ... -
Assessing Sensitivity of Subsurface Mine-Dewatering Activities to Climate Change
(University of Waterloo, 2023-09-01)Underground mining activities require constant removal of groundwater from their void spaces to maintain dry and safely accessible excavations for ore extraction in a process known as dewatering. The nature and degree ... -
Characterizing Aspects of Groundwater Flow in Discontinuous Permafrost Terrain, Within the Central Mackenzie Valley, NWT
(University of Waterloo, 2021-05-26)With recent developments in oil and gas exploration technologies that have opened regions of Canada’s northern territories and the threat of climate change, uncertainties around how these factors may impact the environment ... -
Chlorine and Bromine Isotopic Analyses of Groundwaters and Porewaters from the Bruce Nuclear Site
(University of Waterloo, 2017-10-23)This study reports chlorine (δ37Cl) and bromine (δ81Br) isotopic values for groundwaters and pore fluids from early Paleozoic (Cambrian to Devonian) sedimentary rocks at the Bruce Nuclear Site near Kincardine, Ontario, ... -
Developing the Hydrologic Model of the Laurel Creek Watershed Including the Water Infrastructure
(University of Waterloo, 2016-01-22)Continued growth of the Canadian economy has led to an increased population, which resulted in the progressive urbanization of Canada’s watersheds. Additionally, as infrastructure ages, an increasing percentage of drinking ... -
Evaluation of the Removal of Perfluoroalkyl Substances from Aqueous Matrices in the Presence of Zerovalent Iron
(University of Waterloo, 2018-01-17)Per- and polyfluoroalkyl substances (PFASs) are a class of persistent organic pollutants present in the environment that pose a threat to human health. PFASs primarily reside within aqueous phases and are present in ... -
Evidence for Participation of Anammox in Nitrogen Attenuation Observed in Groundwater Impacted by a Manure Lagoon
(University of Waterloo, 2012-01-23)Decades of agricultural use of fertilizer and manure has resulted in nitrogen being the most common groundwater contaminant. Of the known processes for nitrogen attenuation, both denitrification and anammox produce a ... -
Evolution of Canadian Shield Groundwaters and Gases: Influence of Deep Permafrost
(University of Waterloo, 2008-09-24)Numerous glacial advances over the past 2 million years have covered the entire Canadian and Fennoscandian Shield outcrop. During glacial advance and retreat, permafrost is expected to form in front of the glacier. The ... -
Geophysical response to simulated methane migration in groundwater based on a controlled injection experiment in a sandy unconfined aquifer
(Elsevier, 2019-09)Geophysical methods have the capacity to detect and characterize gas-phase dynamics in groundwater. Suitable methods can be deployed at surface or within boreholes depending on the required depth of investigation, ... -
Hydrogeochemical, Mineralogical and Microbial Processes Occurring in Old Sulfide-Rich Tailings
(University of Waterloo, 2015-09-30)The former Sherritt-Gordon Mine, located in Sherridon Manitoba, processed approximately 7.7 Mt of sulfide ore between 1931 and 1951. The Zn-Cu volcanic massive-sulfide ore body yielded Zn and Cu concentrates with minor ... -
Impact of Climate Change on Canadian Water Resources: A Continental-Scale Hydrologic Modelling Study Using Multiple RCM Projections
(University of Waterloo, 2015-05-20)Evidence of climate change is mounting and there is nowadays an increasing international scientific consensus that current climate change is, in part, induced by anthropogenic emissions of greenhouse gases. Climate change ... -
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 ... -
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 ... -
Investigating new approaches for mapping groundwater systems in karstic carbonate bedrock: A case study in the Early Silurian formations of the Niagara Escarpment cuesta, southern Ontario, Canada
(University of Waterloo, 2019-03-20)The Ontario Geological Survey conducts geoscience mapping that is designed to support groundwater resource investigations across the province. Recent geological mapping in the Early Silurian carbonate bedrock in southern ... -
Macropore flow and transport dynamics in partially saturated low permeability soils
(University of Waterloo, 2007-12-11)Near-surface sediments play an important role in governing the movement of water and contaminants from the land surface through the vadose zone to groundwater. Generally, low permeability surficial soils restrict water ... -
Mercury Transformation and Release from Contaminated Soil Following Perturbations in Solution Chemistry and Application of Polysulfide
(University of Waterloo, 2018-04-09)Mercury (Hg) is a contaminant of concern due to the very high toxicity and bioaccumulating nature of organic Hg and the persistent leaching of Hg to water bodies from contaminated soils and sediments. The deleterious ... -
Metal Isotope Fractionation Associated with Cu and Zn Attenuation by Zero-Valent Iron in Anaerobic Flow-Through Cell Experiments
(University of Waterloo, 2018-01-12)Metal stable isotope fractionation is an emerging tool in the environmental sciences for studying biogeochemical pathways for cycling of metals in the environment. Copper and zinc are essential elements for many biological ... -
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 ... -
Multi-decade comparison of groundwater nitrate in the southern Nottawasaga River Watershed
(University of Waterloo, 2016-08-25)The Nottawasaga River Watershed is host to the Lake Algonquin Sand Aquifer (LASA), an unconfined aquifer that consists of glaciolacustrine sands and provides water supply to rural residents, for household use, and for ... -
Numerical Simulation of Road Salt Impact at the Greenbrook Well Field, Kitchener, Ontario
(University of Waterloo, 2002)Chloride concentrations at the Greenbrook well field in Kitchener, Ontario, have been steadily increasing over the past several decades and may soon pose a threat to drinking water quality. Drinking water limits at some ...