Browsing Civil and Environmental Engineering by Type "Doctoral Thesis"
Now showing items 41-60 of 332
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Carbon Sequestration: Uncertainty and Parameter Estimation
(University of Waterloo, 2015-05-21)Carbon Capture and Sequestration (CCS) appears to be a practical technology for large-scale storage of CO2 to reduce anthropogenic CO2 emissions. Risk is an inevitable component of any geological project with the aim of ... -
The changing influence of permafrost on peatlands hydrology
(University of Waterloo, 2021-01-20)Hydrology and hydrological modelling in the far north is understudied, and many gaps exist in the current understanding and representation of northern thermal and hydrological systems. A combination of fieldwork and modelling ... -
Chaotic Advection for Enhanced Reagent Mixing
(University of Waterloo, 2019-04-17)In situ remediation techniques commonly involve the injection of a reagent into the subsurface to create a zone in which biological and/or chemical reactions lead to mass destruction of contaminants. In these injection-driven ... -
Characterization of Anaerobic Membrane Bioreactors (AnMBR) Treating Municipal Wastewater
(University of Waterloo, 2015-02-18)The study investigated the impact of solids retention time (SRT), hydraulic retention time (HRT) and the addition of FeCl3 on bioprocess and membrane performance of anaerobic membrane bioreactor (AnMBR) treating authentic ... -
Characterization of anaerobic membrane digesters for stabilization of waste activated sludge
(University of Waterloo, 2010-10-12)Anaerobic membrane bioreactors may provide a sustainable technological solution for digestion of waste activated sludge due to their capacity to achieve substantial volatile solids (VS) destruction and positive energy ... -
Characterization of Pretreatment Impacts on Properties of Waste Activated Sludge and Digestibility
(University of Waterloo, 2010-02-17)Technologies for pretreatment of waste activated sludges (WAS) prior to digestion are of increasing interest to wastewater treatment utilities because of their promise for improving sludge digestibility and reducing the ... -
Characterization of Tertiary Membrane Fouling in Cold Climates
(University of Waterloo, 2022-01-13)Cold climates have limited the application of membrane technologies in tertiary treatment by affecting both secondary biological and tertiary membrane processes. There is a need to develop a fundamental understanding of ... -
Climate Change Projection and Time-varying Multi-dimensional Risk Analysis
(University of Waterloo, 2016-09-20)In recent decades, population growth and global warming consequent to greenhouse gas emissions because of human activities, has changed the atmospheric composition leading to intensifying extreme climate phenomena and ... -
Closed Loop Geothermal System Design
(University of Waterloo, 2022-06-17)In contrast to other renewable sources (e.g., wind and solar) that may only be intermittently available throughout a day or year, geothermal resources provide a carbon-free and sustainable source of energy for base-load ... -
Combined Strategic-Tactical Planning for Facility Rehabilitation Using System Dynamics and Optimization
(University of Waterloo, 2016-01-25)Rehabilitation programs are essential for efficiently managing large networks of infrastructure assets and sustaining their safety and operability. While numerous studies in the literature have focused on various aspects ... -
Comprehensive CP Optimization for Dynamic Scheduling in Construction
(University of Waterloo, 2018-05-11)Delays and cost overruns are common facts in construction projects due to its increasing complexity, the day-to-day dynamic changes, the stricter execution constraints, and the general lack of efficient scheduling tools ... -
Comprehensive Simulation Assessment of Nitrate Mass Loading to Groundwater from Agricultural Landscapes
(University of Waterloo, 2013-09-03)The goal of this research was to evaluate the ability of two agricultural system models, the Root Zone Water Quality Model (RZWQM) and the Coupled Model (CoupModel), to simulate temporal nitrate mass loading below the root ... -
Computationally Efficient Extended and Stabilized Finite Element Methods for Multiphase Carbon Sequestration Modelling
(University of Waterloo, 2016-09-01)Carbon sequestration in deep saline aquifers has been proposed for long term storage of CO2 as an alternative to the release of CO2 into the atmosphere. In this thesis a computationally efficient numerical model that ... -
Conceptual Model Uncertainty in the Management of the Chi River Basin, Thailand
(University of Waterloo, 2012-05-04)With increasing demand and pressures on groundwater resources, accurate and reliable groundwater prediction models are essential for sustainable groundwater management. Groundwater models are merely approximations of ... -
Condition Assessment of Cemented Materials Using Ultrasonic Surface Waves
(University of Waterloo, 2013-08-09)Mechanical waves provide information about the stiffness and the condition of a medium; thus, changes in medium conditions can be inferred from changes in wave velocity and attenuation. Non-destructive testing (NDT) methods ... -
Condition Assessment of Concrete Elements through Two Nondestructive Ultrasonic Techniques
(University of Waterloo, 2017-07-13)Reinforced concrete is one of the materials most used in civil infrastructure, and the expected service life is generally for several decades. However, as any other material, concrete performance is affected by environmental ... -
Condition Assessment of In-Service Pendulum Tuned Mass Dampers
(University of Waterloo, 2012-09-28)Tuned mass dampers (TMDs) are auxiliary damping devices installed within tall structures to reduce undesirable wind-induced vibrations and to enhance the overall system damping and hence, the dissipative capacity. The ... -
Construction Scheduling using Critical Path Analysis with Separate Time Segments
(University of Waterloo, 2010-08-06)Project managers today rely on scheduling tools based on the Critical Path Method (CPM) to determine the overall project duration and the activities’ float times. Such data provide important information about the degree ... -
Construction Site-Layout Optimization Considering Workers' Behaviors Around Site Obstacles, Using Agent-Based Simulation
(University of Waterloo, 2019-01-24)The majority of construction projects, especially large ones, experience time delays, cost overruns, productivity loss, and/or accidents. This is particularly so in case of congested and disorganized sites that contain ... -
Construction Workflow and Document Diagnostics
(University of Waterloo, 2014-10-06)This research aims to determine if there is sufficient information encoded within construction workflow histories and document meta-data that may be exploited for the development of knowledge constructs such as diagnosis, ...