Browsing Civil and Environmental Engineering by Title
Now showing items 838-857 of 881
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Treatment of Arsenic Contaminated Groundwater using Oxidation and Membrane Filtration
(University of Waterloo, 2005)Arsenic is a known carcinogen, causing cancers of the skin, lungs, bladder and kidney. Current research suggests that drinking water is the most common pathway for long-term low dose exposure. Arsenic contaminated ... -
The Treatment of High Hardness Waters by Electrocoagulation: Factors Affecting Contaminant Removal, Electrode Fouling, and Precipitate Separation
(University of Waterloo, 2021-12-15)Electrocoagulation (EC) is an emerging electrochemical technology for the treatment of contaminated waters and wastewaters. EC involves the application of electric current to metal electrodes to release metal ions into the ... -
Treatment of the Cyanotoxin Anatoxin-a via Activated Carbon Adsorption
(University of Waterloo, 2015-05-22)Cyanobacteria are bloom-forming aquatic microorganisms that impact many drinking water sources and can produce a variety of toxins, eponymously termed cyanotoxins. Three cyanotoxins are of particular concern in a North ... -
Treatment of the Cyanotoxins Cylindrospermopsin, Microcystin-LR, and Anatoxin-a by Activated Carbon in Drinking Water
(University of Waterloo, 2017-08-23)Cyanotoxins are known to cause human and animal illness, in some cases resulting in death, and their presence in drinking water is a potential risk to public health. Cylindrospermopsin (CYL), microcystin-LR (MC-LR), and ... -
Turbulence structures in isolated pool-riffle units
(University of Waterloo, 2019-01-28)The macroscale morphology of a river has significant effects on sediment transport, flow pattern, bed stability, and ecosystem function. Pools and riffles, which are respectively the deeper and shallower parts of the bed, ... -
A Two-Phase Maintenance and Rehabilitation Framework for Pavement Assets under Performance Based Contracts
(University of Waterloo, 2012-08-30)Traditional Canadian pavement construction contracts provide detailed specifications for the work that needs to be carried out. This is the case for both maintenance and rehabilitation contracts. However, for many road ... -
Typologies of Nitrogen Surplus Across Continental US: Shifting Hotspots and Dominant Controls
(University of Waterloo, 2019-12-17)Flows of reactive nitrogen (N) have significantly increased over the last century, corresponding to increases in the global population. The pressures on the N cycle include human waste, fossil fuel combustion as well as ... -
Uncertainty Analysis and the Identification of the Contaminant Transport and Source Parameters for a Computationally Intensive Groundwater Simulation
(University of Waterloo, 2009-05-15)Transport parameter estimation and contaminant source identification are critical steps in the development of a physically based groundwater contaminant transport model. Due to the irreversibility of the dispersion process, ... -
Understanding the fundamentals and application of electrically conductive biofilm in dry digestion
(University of Waterloo, 2023-07-27)The application of microbial electrolysis cell assisted anaerobic digestion (MEC-AD) system for dry digestion to recover methane from food waste (FW) is promising. Understanding the extracellular electron transfer (EET) ... -
Unsupervised Methods for Condition-Based Maintenance in Non-Stationary Operating Conditions
(University of Waterloo, 2022-04-28)Maintenance and operation of modern dynamic engineering systems requires the use of robust maintenance strategies that are reliable under uncertainty. One such strategy is condition-based maintenance (CBM), in which ... -
Up-Scaling Distinct Element Method Simulations of Discontinua
(University of Waterloo, 2017-01-20)Pre-existing fractures significantly influence the geomechanical response of the rock mass at the reservoir scale. For geomechanical applications, these natural fractures need to be considered in the mechanical response ... -
Updating the Canadian Reference Hydrometric Basin Network to detect climate-related trends in streamflow
(University of Waterloo, 2019-04-26)This thesis developed a new set of selection criteria to renew the Canadian Reference Hydrometric Basin Network (RHBN) and improve its coverage of non-atmospheric factors affecting streamflow such as geographic location, ... -
Upflow anaerobic-microaerobic fixed biofilm reactor integrating methanogenesis with partial nitrification
(Elsevier, 2018-09-15)An anaerobic-microaerobic fixed biofilm (AMFB) reactor, that integrates methanogenesis with partial nitrification within a single unit was investigated to achieve carbon removal simultaneously with ammonium oxidation in ... -
Upscaling Fill-and-Spill Hydrologic Processes
(University of Waterloo, 2023-04-25)Low-gradient landscapes found in parts of the Taiga Plains and the North American Prairies can be dominated by many depressional wetlands with variable storage capacity. Runoff from these regions is influenced by the local ... -
Upscaling of Coupled Models with Topography-Driven Surface-Water/Groundwater Interactions
(University of Waterloo, 2016-05-16)Since the 1950s, groundwater and surface water models have evolved to better represent complex hydrological and hydrogeological systems. Part of this evolution has been the coupling of surface and subsurface models to ... -
Upscaling of lateral groundwater flow processes in watershed models
(University of Waterloo, 2021-12-14)Hydrologic models are essential tools for hydrologists and water resources engineers. However, there is a critical gap between our knowledge of the appropriate model representation of physical processes at the point scale ... -
Upstream River Responses to Low Head Dam Removal
(University of Waterloo, 2008-01-21)Field and modelling investigations of eight failed or removed dams have been undertaken to examine the upstream effects of low head dam decommissioning on channel morphology. Failed or decommissioned sites were selected ... -
The Urban Metabolism of the Greater Toronto Area: A Study of Nitrogen and Phosphorus Fluxes across the Urban, Suburban, and Rural Continuum
(University of Waterloo, 2019-05-21)It has been predicted that approximately 65% of the developing world and 85% of the developed world will be living in cities by 2050. Toronto, the largest city in Canada and the fourth largest in North America, is expected ... -
Usage of Interface Management System in Adaptive Reuse of Buildings
(MDPI, 2019-05)Adaptive reuse of buildings is considered a superior alternative for new construction in terms of sustainability and a disruptive practice in the current capital project delivery model for the renewal of today’s built ... -
The Use of Coagulation as a Pre-treatment to Ultra-filtration Membranes
(University of Waterloo, 2007-09-17)ABSTRACT With an increasing population density throughout the world and the current drive to provide fresh water to as many people as possible, innovative methods of providing safe drinking water are in very high demand. ...