Browsing Civil and Environmental Engineering by Title
Now showing items 671-690 of 865
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Quality Assessment of Composite Materials using Ultrasonic Non-Destructive Testing Methods
(University of Waterloo, 2020-09-17)Non-destructive ultrasonic evaluation (NDE) is commonly used for assessment of civil infrastructure and characterization of construction materials. It is an efficient technique that could save millions of dollars with ... -
Quantification of PFAS Fate in Sludge Handling Systems
(University of Waterloo, 2023-08-14)Per- and polyfluoroalkyl substances (PFAS) have been detected in biosolids, raising concerns regarding their potential leaching into soils, groundwater, and plants when biosolids are land applied. In this study, the fate ... -
Quantifying Greenhouse Gas Mitigation Measures during Provincial Highway Design, Construction, and Maintenance Activities
(University of Waterloo, 2020-12-18)In response to the increasing need to address global climate change, departments of transportation have adopted and promoted diverse mitigation measures to reduce source and enhance sinks of the greenhouse gas (GHG) emissions ... -
Quantifying Pavement Sustainability For Ontario Highways
(University of Waterloo, 2010-08-26)With the emerging trend of sustainability, sustainable infrastructure is highly regarded by the general public. Sustainable pavement is also a concept that has driven many research motivations today. These motivations ... -
Quantifying the Effects of Winter Weather and Road Maintenance on Emissions and Fuel Consumptions
(University of Waterloo, 2015-09-24)Winter road maintenance (WRM) has significant benefits including improving road safety and reducing traffic delay caused by adverse weather conditions. It has also been suggested that WRM is beneficial in terms of reducing ... -
Quantifying the Impact of Transit Reliability on Users Cost - A Simulation Based Approach
(University of Waterloo, 2009-08-27)The role of public transportation increases as travel demand increases due to the growth in population and economics. The importance of providing a balanced public transportation has increased. In Ontario, Canada, the ... -
Quantifying the Impact of Transit Rider Perception and Satisfaction on User Cost: An Experiential Sampling Approach Using Smartphones
(University of Waterloo, 2018-03-15)The aim of travel demand modelling is to accurately estimate trips in future time periods by understanding current travel behaviours. Accurate generalized cost modelling for determining transit mode share has proven elusive. ... -
Quantifying the Mobility Benefits of Winter Road Maintenance – A Simulation Based Approach
(University of Waterloo, 2009-04-30)A good understanding of the relationship between highway performance, such as crash rates and travel delays, and winter road maintenance activities under different winter weather and traffic conditions is essential to ... -
Quantifying the Technical Efficiency of Canadian Paratransit Systems Using Data Envelopment Analysis Method
(University of Waterloo, 2005)Paratransit service operators in Canada are under increasing pressure to improve the operational productivity of their services due to increased demand and tightening financial constraints. To achieve this, Paratransit ... -
Quantitative Structure-Property Relationships Modeling of Rate Constants of Selected Micropollutants in Drinking Water Treatment Using Ozonation and UV/H2O2
(University of Waterloo, 2012-05-23)Concern over the occurrence of micropollutants in drinking water and their health effects is increasing. Therefore, there is a growing interest in understanding micropollutant removal during drinking water treatment. ... -
A Random Forest in the Great Lakes: Exploring Nutrient Water Quality in the Laurentian Great Lakes Watersheds
(University of Waterloo, 2020-09-22)A data driven approach was used in this study to investigate the drivers of nutrient water quality across the Laurentian Great Lakes drainage basin. Monitored time series of nutrient water quality and discharge were modelled ... -
A Rapid Field Method to Estimate the Concentration of Sorbing Particulate Amendments in Soil Samples
(University of Waterloo, 2023-04-11)The immobilization of plumes of contaminants in groundwater via in-situ adsorption is an emerging remediation technology. This technology involves injecting adsorbent particles into the subsurface to form a stationary ... -
Real Time Data Acquisition and Prediction Model Comparison using Maxi Directional Drills
(University of Waterloo, 2013-09-26)Horizontal Directional Drilling (HDD) is used around the world when traditional open cut methods are not practical or impossible for installing pipelines. Maxi-sized drill rigs are the largest and most powerful directional ... -
Real Time Prediction of Traffic Speed and Travel Time Characteristics on Freeways
(University of Waterloo, 2017-01-20)Travel time is one of the important transportation performance measures, and represents the quality of service for most of the facilities. In other words, one of the essential goals of any traffic treatment is to reduce ... -
Real-time Control and Optimization of Water Supply and Distribution infrastructure
(University of Waterloo, 2017-04-28)Across North America, water supply and distribution systems (WSDs) are controlled manually by operational staff - who place a heavy reliance on their experience and judgement when rendering operational decisions. These ... -
Real-Time Vehicle Emission Estimation Using Traffic Data
(University of Waterloo, 2019-05-23)The current state of climate change should be addressed by all sectors that contribute to it. One of the major contributors is the transportation sector, which generates a quarter of greenhouse gas emissions in North ... -
Realistic expectations for the treatment of FMGP residuals by chemical oxidants
(Elsevier, 2018-12-01)Methods to remediate soil and groundwater contamination at former manufactured gas plant (FMGP) sites are scarce. The objective of this study was to investigate the ability of two chemical oxidants (persulfate and permanganate) ... -
Recent changes in patterns of western Canadian river flow and association with climatic drivers: A CROCWR component
(University of Waterloo, 2013-12-10)Climatic variability and change can have profound impacts on the hydrologic regime of a watershed, especially in regions that are particularly sensitive to changes in climate, such as the northern latitudes and alpine-fed ... -
Recognizing Structural Nonidentifiability: When Experiments Do Not Provide Information About Important Parameters and Misleading Models Can Still Have Great Fit
(Wiley, 2020-02)In the quest to model various phenomena, the foundational importance of parameter identifiability to sound statistical modeling may be less well appreciated than goodness of fit. Identifiability concerns the quality of ... -
Recoupling the Livestock Nutrient Economy: A Path forward for Water Quality Improvement
(University of Waterloo, 2019-09-23)Intensification of farming operations and increased nutrient application rates have led to higher crop yields and greater food security. At the same time, widespread use of commercial nitrogen (N) and phosphorus (P) ...