Browsing Civil and Environmental Engineering by Title
Now showing items 804-823 of 839
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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, ... -
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 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. ... -
The Use of Risk Analysis Techniques to Determine the Probability of Producing Non-Compliant Drinking Water: Focusing on Dual Media Rapid Gravity Filtration
(University of Waterloo, 2006)The main goal of a drinking water treatment plant is to provide safe drinking water for its consumers. Historically, this was accomplished through monitoring the influent and effluent water quality to ensure that the ... -
Using AASHTOWare Pavement ME Design Tools to Evaluate Flood Impact on Concrete Pavement Performance
(University of Waterloo, 2019-08-21)The resilience of concrete pavement to flood impact has remained positive based on previous experimental investigations and overtime recommended as a pre-flood adaptation strategy in countries such as Australia and the ... -
Using Finite Element Modeling to Gain Insights into the Mechanics of Wound Healing in Drosophila
(University of Waterloo, 2013-01-25)Although it is not difficult to observe the healing of induced wounds in animal embryos, mapping the forces that drive lesion closure has proved challenging. Laser microsurgery, Atomic Force Microscopy (AFM) and other ... -
Using Microsimulation to Estimate the Impact of Transportation Improvements and Operational Policy Changes on Travel Time Reliability
(University of Waterloo, 2017-01-16)Traditionally, traffic engineers have designed roadway networks and operational strategies to manage congestion and minimize delays during the peak demand period for some “average” or “typical” day. However, increasingly, ... -
Using Road Weather Information Systems (RWIS) to optimize the Scheduling of Load Restrictions on Northern Ontario's Low-Volume Highways
(University of Waterloo, 2007-09-18)Covering the Northern part of the Province, Ontario’s low-volume roads provide a link from remote resource areas to markets. Thus, preserving this transportation asset from the two main sources of pavement deterioration, ... -
Using Transit AVL/APC System Data to Monitor and Improve Schedule Adherence
(University of Waterloo, 2010-04-29)The implementation of automatic transit data collection via Automatic Vehicle Location (AVL) and Automatic Passenger Counting (APC) systems provides an opportunity to create large, detailed datasets of transit operations. ...