Browsing Civil and Environmental Engineering by Title
Now showing items 647-666 of 881
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Phosphorus Removal and Recovery from Wastewater using Sorbent Technologies
(University of Waterloo, 2018-08-03)Phosphorus (P) is an essential nutrient in fertilizers that are necessary for food production. Wastewater may represent a renewable source of nutrients if methods for recovering P from dilute wastewater streams can be ... -
Phosphorus Sequestration for Control of Cyanobacterial Growth in Drinking Water Reservoirs
(University of Waterloo, 2016-10-05)Engineered drinking water reservoirs are designed to facilitate particle settling for reduction of turbidity prior to conveyance to a drinking water treatment plant (DWTP). Fine cohesive sediment particles can carry ... -
The pie sharing problem: Unbiased sampling of N+1 summative weights
(Elsevier, 2022-02)A simple algorithm is provided for randomly sampling a set of N+1 weights such that their sum is constrained to be equal to one, analogous to randomly subdividing a pie into N+1 slices where the probability distribution ... -
A Pilot Study Regarding the Use of Food Waste Grinders in a Multi-Unit Residential Building
(University of Waterloo, 2022-07-25)This study evaluated the impact of food waste grinders (FWGs) in multi-unit residential buildings (MURBs) that also had access to green bins (GBs) on solid waste and wastewater generation. A 15-month technical sampling ... -
Pipe and Ductwork Progress Tracking using 3D Sensing Technologies
(University of Waterloo, 2012-04-30)Automated construction progress tracking is becoming critical to efficient and effective construction management. More and more construction companies are putting aside the old way of tracking progress, which was mainly ... -
A Planning Model for Optimizing Locations of Changeable Message Signs
(University of Waterloo, 2004)Changeable Message Signs (CMS) are commonly utilized by transportation agencies to inform motorists of traffic, roadway, and environmental conditions. They may be used to provide information, such as delay and alternate ... -
Porous Asphalt Pavement Designs: Proactive Design for Cold Climate Use
(University of Waterloo, 2007-08-14)Porous asphalt pavements offer an alternative technology for stormwater management. A porous asphalt pavement differs from traditional asphalt pavement designs in that the structure permits fluids to pass freely through ... -
Practical Performance Criteria and Durability Prediction Modeling of Glass Fiber Reinforced Polymer (GFRP) Bars
(University of Waterloo, 2017-05-15)Glass fiber reinforced polymer (GFRP) bars are becoming a reasonable alternative to steel bars in reinforced concrete members as a method to address issues of corrosion and electromagnetic interference. This growing interest ... -
Pragmatic Groundwater-Surface Water Model Coupling with Unstructured Grids
(University of Waterloo, 2021-07-29)Faced with an array of water issues exacerbated by a rapidly changing climate, hydrologists and hydrogeologists have increasingly found themselves needing to simultaneously model the groundwater and surface water domains ... -
Pre-Treatment Evaluation Prior to Ultrafiltration in Secondary Effluent Treatment for Water Reuse
(University of Waterloo, 2015-12-17)Reusing wastewater can assist in solving water shortage problems, reduce the amount of wastewater discharged to surface water bodies and, by extension, alleviate its adverse effects on humans and the environment. Organics ... -
Precast Concrete Inlay Panels: Rehabilitation Strategy for High-Volume Highways in Ontario
(University of Waterloo, 2018-08-03)The Ministry of Transportation of Ontario (MTO) has responsibility for many high-volume highways throughout the province of Ontario, including the 400-series highways. Several of these highways have exhibited a premature ... -
Predicting and Prolonging the Service Life of Weathering Steel Highway Structures
(University of Waterloo, 2009-08-25)Weathering steel is a high-strength, low-alloy steel which has been proven to provide a significantly higher corrosion resistance than regular carbon steel. This corrosion resistance is a product of the small amounts of ... -
Predicting Pervious Concrete Pavement Performance for Usage in Cold Climates
(University of Waterloo, 2010-01-18)Pervious Concrete Pavement (PCP) has the potential to provide significant benefits. To better understand the technical, economical, and environmental impacts of PCP, the performance must be comprehensively evaluated and ... -
Predicting Subsidence Resulting from Tunnel Excavation
(University of Waterloo, 2010-11-22)As a result of tunnel construction, the ground level surface above will tend to collapse downward as the soil seeks to refill the missing tubular cavity. Many infrastructures that were originally built on that surface may ... -
Predicting the Effectiveness of Post-Weld Treatments Applied under Load
(University of Waterloo, 2010-08-26)Existing steel bridges are subjected to both increasing traffic loads and natural aging, both are capable of causing severe durability problems. Dependable rehabilitation methods are attracting attention as the promising ... -
Predicting the Removal of Micropollutants in Lake Ontario and Grand River using Ozonation
(University of Waterloo, 2019-01-15)Micropollutants occur at low concentrations (µg/L to ng/L), can have a range of environmental and health effects, and can enter surface water through run-off from fields and wastewater discharge. Surface water is used for ... -
Prediction of the static modulus of elasticity in concrete cylinders using resonant tests
(University of Waterloo, 2019-10-15)Concrete is widely used in construction nowadays, and it is crucial that its behaviour conforms to the original design. In every construction site, standard concrete cylinders are cast for quality control. Concrete cylinders ... -
Predictions of Flexural Behaviour of Built-Up Cold-Formed Steel Sections
(University of Waterloo, 2007-09-13)In recent years, light gauge cold-formed steel members have been used extensively in low and mid- rise residential building construction. In cold-formed steel design there are several applications where built-up box girders ... -
Pressure Sensor Placement for Leak Diagnosis under Demand Uncertainty in Water Distribution Systems
(University of Waterloo, 2019-01-24)Leakages in concealed pipes in urban water distribution systems (WDS) can cause losses of up to 25% of potable water supply in municipalities. These losses are not only a tremendous waste of water but also the energy spent ... -
Principal Component and Independent Component Regression for Predicting the Responses of Nonlinear Base Isolated Structures
(University of Waterloo, 2009-01-23)Peak base displacement is one of the most important quantities in the design of base-isolated buildings. During the preliminary stages of design, a nonlinear time-history analysis is often not possible or too expensive, ...