Browsing Civil and Environmental Engineering by Issue Date
Now showing items 21-40 of 839
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Interaction of Chemical Oxidants with Aquifer Materials
(University of Waterloo, 2006)In situ chemical oxidation (ISCO) is a leading-edge technology for soil and groundwater remediation, and involves injecting a chemical oxidant (e. g. , permanganate, hydrogen peroxide, or persulfate) into the subsurface ... -
Temporal Disaggregation of Daily Precipitation Data in a Changing Climate
(University of Waterloo, 2006)Models for spatially interpolating hourly precipitation data and temporally disaggregating daily precipitation to hourly data are developed for application to multisite scenarios at the watershed scale. The intent is ... -
A Bench-scale Evaluation of the Removal of Selected Pharmaceuticals and Personal Care Products by UV and UV/H₂O₂ in Drinking Water Treatment
(University of Waterloo, 2006-12-22)A bench-scale study of the degradation of four selected pharmaceuticals and personal care products (PPCPs) was carried out using UV and UV/H₂O₂ treatment employing low pressure (LP) and medium pressure (MP) lamps. The ... -
Hydrologic Validation of Real-Time Weather Radar VPR Correction Methods
(University of Waterloo, 2007-01-05)Weather radar has long been recognized as a potentially powerful tool for hydrological modelling. A single radar station is able to provide detailed precipitation information over entire watersheds. The operational use of ... -
A Numerical Interpretation Model for the Dipole Flow and Reactive Tracer Test
(University of Waterloo, 2007-01-12)In order to protect public health and the natural environment, regulatory agencies such as the U.S. Environmental Protection Agency (USEPA) and the Ontario Ministry of the Environment (MOE) have developed a variety of ... -
Material Modelling for Structural Analysis of Polyethylene
(University of Waterloo, 2007-01-17)The purpose of this work was to develop a practical method for constitutive modelling of polyethylene, based on a phenomenological approach, which can be applied for structural analysis. Polyethylene (PE) is increasingly ... -
An Integrated Design Approach for Improving Drinking Water Ozone Disinfection Treatment Based on Computational Fluid Dynamics
(University of Waterloo, 2007-01-22)Ozonation is currently considered as one of the most effective microbial disinfection technologies due to its powerful disinfection capacity and reduction in levels of chlorinated disinfection by-products (DBP). However, ... -
Renewal of Potable Water Systems Using Cement Mortar Lining; an Investigation into Corrosion Reduction and Water-loss Prevention
(University of Waterloo, 2007-01-23)Many Canadian cities are faced with the problem of an aging and deteriorating iron water distribution network - pipe breaks, leakage, and/or aesthetic water quality problems. Public confidence in municipalities’ ability ... -
Parameter Estimation and Uncertainty Analysis of Contaminant First Arrival Times at Household Drinking Water Wells
(University of Waterloo, 2007-01-25)Exposure assessment, which is an investigation of the extent of human exposure to a specific contaminant, must include estimates of the duration and frequency of exposure. For a groundwater system, the duration of exposure ... -
Construction Delay Analysis under Multiple Baseline Updates
(University of Waterloo, 2007-02-26)Due to the inherent risks and increasing complexity of modern construction projects, delays and cost overruns have become common facts in the industry. Researchers and practitioners have used many techniques to assess ... -
The Development of Asphalt Mix Creep Parameters and Finite Element Modeling of Asphalt Rutting
(University of Waterloo, 2007-03-12)Asphalt pavement rutting is one of the most commonly observed pavement distresses and is a major safety concern to transportation agencies. Millions of dollars are reportedly spent annually to repair rutted asphalt ... -
Estimating Effectiveness of Countermeasures Based on Multiple Sources: Application to Highway-Railway Grade Crossings
(University of Waterloo, 2007-03-13)To provide an adequate level of safety at grade crossings, Transport Canada has allocated several millions annually to prevent collisions at grade crossings through the implementation of countermeasures, such as train-actuated ... -
Stochastic Modeling of Deterioration in Nuclear Power Plant Components
(University of Waterloo, 2007-04-13)The risk-based life-cycle management of engineering systems in a nuclear power plant is intended to ensure safe and economically efficient operation of energy generation infrastructure over its entire service life. An ... -
Progressive-Failure Analysis of Steel Building Structures under Abnormal Loads
(University of Waterloo, 2007-04-18)Engineered structures are designed to resist all expected loadings without failure. However, structural failures do occasionally occur due to inadequate design and construction, especially for extreme and abnormal loads. ... -
Monotonic and Fatigue Performance of RC Beams Strengthened with Externally Post-Tensioned CFRP Tendons
(University of Waterloo, 2007-05-04)External post-tensioning is an attractive technique for strengthening reinforced concrete structures because of its ability to actively control stresses and deflections, speed of installation, minimum interruption for the ... -
Monotonic and Fatigue Flexural Behaviour of RC Beams Strengthened with Prestressed NSM CFRP Rods
(University of Waterloo, 2007-05-11)The use of near surface mounted (NSM) carbon fibre reinforced polymer (CFRP) reinforcement is a recent and a promising technique for increasing the flexural capacity and the fatigue life of reinforced concrete (RC) flexural ... -
Bridge Management System with Integrated Life Cycle Cost Optimization
(University of Waterloo, 2007-05-15)In recent years, infrastructure renewal has been a focus of attention in North America and around the world. Municipal and federal authorities are increasingly recognizing the need for life cycle cost analysis of infrastructure ... -
Removal of MS2 Bacteriophage, Cryptosporidium, Giardia and Turbidity by Pilot-Scale Multistage Slow Sand Filtration
(University of Waterloo, 2007-05-16)This research aimed to address the knowledge gaps in the literature regarding the removal of waterborne pathogens (viruses and protozoa) by modified multistage slow sand filtration. In the current study, two pilot-scale ... -
The Impact of NOD Reaction Kinetics on Treatment Efficiency
(University of Waterloo, 2007-05-18)In situ chemical oxidation (ISCO) with permanganate is a remedial technology that has been prevalent over the last decade. Permanganate is injected into the subsurface to oxidized reduced organic contaminants with the ... -
Volume Changes during Fracture Injection of Biosolids
(University of Waterloo, 2007-05-22)The term biosolids refers to the nutrient-rich organic materials resulting from the treatment of domestic sewage at a wastewater treatment facility. It is a widely acceptable term for sewage sludge that has been treated ...