Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Flooding (2)
- Water quality (2)
- Adaptive control (1)
- Agriculture (1)
- Attenuation (1)
-
- Base isolation (1)
- Catchment modelling (1)
- Chlorophyll (1)
- Civil structures (1)
- Climate change (1)
- Community (1)
- Compaction (1)
- Compresión (1)
- Compressibility (1)
- Deleznable (1)
- Dissolved oxygen (1)
- Domestic (1)
- Ems River Estuary (Germany and Netherlands) (1)
- Estuaries (1)
- Estuaries -- Turbidity -- Mathematical models (1)
- Estuaries -- Water quality (1)
- Estuarine sediments (1)
- Green infrastructure (1)
- Health (1)
- Hydraulic conductivity (1)
- Hydraulic engineering (1)
- Hydrology (1)
- Infrared imaging (1)
- Intelligent control (1)
- Low impact development (1)
- Publication
- Publication Type
Articles 1 - 11 of 11
Full-Text Articles in Civil Engineering
Intelligent Controller For Smart Base Isolation Of Masonry Structures, Simon Laflamme, T.Y. Yu, Jerome J. Connor
Intelligent Controller For Smart Base Isolation Of Masonry Structures, Simon Laflamme, T.Y. Yu, Jerome J. Connor
Simon Laflamme
In this paper, an intelligent controller to control a smart base-isolated masonry structure is proposed. The smart base isolation consists of rubber bearings and a magnetorheological damper. This semi-active scheme takes advantage of the low power requirement of magnetorheological devices to achieve structural control. The controller is capable of mapping the behaviour of the controlled structure sequentially, using a self-organizing neural network which has time-varying learning rates. This neurocontroller is augmented by a sliding mode controller to account for the uncertainty on the semi-active damping forces. Wavelets are used as functions in the single hidden layer for their capability of …
Investigation Of The Geotechnical Properties Of Municipal Solid Waste As A Function Of Placement Conditions, Wilson W. Wong
Investigation Of The Geotechnical Properties Of Municipal Solid Waste As A Function Of Placement Conditions, Wilson W. Wong
Master's Theses
An investigation of the variability of engineering properties of municipal solid waste as a function of placement conditions was conducted. Limited data have been reported for the engineering properties of municipal solid waste (MSW) as a function of placement conditions. Wastes have high variability of engineering properties due to heterogeneity in composition and component size; influence from time based effects; and presence of compressible solids. Control of moisture content of MSW at the time of waste placement provides opportunity for increased capacity at a given landfill site due to higher compacted unit weight as well as for control of other …
Estabilización Físico-Química De Un Suelo, Una Metodología De Laboratorio Para Su Evaluación, Caso Cd. Hermosillo, Sonora, México, Israel Miranda Pasos, Salvador Aguayo-Salinas, Jesús Leobardo Valenzuela García, Jorge Ramírez Hernández, Juan Arcadio Saíz Hernández
Estabilización Físico-Química De Un Suelo, Una Metodología De Laboratorio Para Su Evaluación, Caso Cd. Hermosillo, Sonora, México, Israel Miranda Pasos, Salvador Aguayo-Salinas, Jesús Leobardo Valenzuela García, Jorge Ramírez Hernández, Juan Arcadio Saíz Hernández
Épsilon
En la actualidad, en las ciudades en desarrollo, la contaminación debida al polvo por falta de pavimento vial es un problema. Existen productos de tecnología avanzada encaminados a mitigar este problema; sin embargo, la adquisición de ellos, en la mayoría de los casos, no es factible económicamente. La presente investigación propone una metodología con el fin de evaluar productos regionales comunes para su aplicación como estabilizadores de suelo: cal hidratada, zeolita natural, lignosulfonato de calcio y cal viva. La evaluación se realiza mediante los parámetros de resistencia a carga directa y prueba de saturación-inmersión; esta última con el fin de …
Rainwater Harvesting Pilot Project Report, Liam Mccarton, Sean O'Hogain, Anna Reid, Niamh Mcintyre, Jenny Pender
Rainwater Harvesting Pilot Project Report, Liam Mccarton, Sean O'Hogain, Anna Reid, Niamh Mcintyre, Jenny Pender
Reports
The rainwater harvesting pilot project was commissioned by the National Rural Water Monitoring Committee in 2005 to assess the feasibility of supplementing treated mains water used for non-potable purposes. The project involved the design, installation, commissioning and monitoring of rainwater harvesting facilities in a rural housing development in County Carlow and in a 250-acre livestock farm in County Meath. Construction was carried out between 2005-2007.
Vertical Boil Propagation From A Submerged Estuarine Sill, C. Chris Chickadel, Alexander R. Horner-Devine, Stefan A. Talke, Andrew T. Jessup
Vertical Boil Propagation From A Submerged Estuarine Sill, C. Chris Chickadel, Alexander R. Horner-Devine, Stefan A. Talke, Andrew T. Jessup
Civil and Environmental Engineering Faculty Publications and Presentations
Surface disruptions by boils during strong tidal flows over a rocky sill were observed in thermal infrared imagery collected at the Snohomish River estuary in Washington State. Locations of boil disruptions and boil diameters at the surface were quantified and are used to test an idealized model of vertical boil propagation. The model is developed as a two-dimensional approximation of a three-dimensional vortex loop, and boil vorticity is derived from the flow shear over the sill. Predictions of boil disruption locations were determined from the modeled vertical velocity, the sill depth, and the over-sill velocity. Predictions by the vertical velocity …
Sustainable Portland: Implementation Series 2, New England Environmental Finance Center
Sustainable Portland: Implementation Series 2, New England Environmental Finance Center
Climate Change
The Portland Municipal Climate Change Working Group prepared a report in March 2008 that outlined several recommendations as a commitment by the City to address greenhouse gas emissions (GHG) produced during daily municipal operations. The Municipal Climate Action Plan was written in partnership with Clean Air – Cool Planet and Portland officials, and acknowledges under Recommendation #2 that an employee energy efficiency program would provide significant positive impact on the City’s reduction of greenhouse gas emissions. Best practices from three cities show that focus on the greening of City Hall is critical in developing a program that promotes partnerships, community …
Spatiotemporal Estuarine Water Quality Parameterization Using Remote Sensing And In-Situ Characteristics, Kwisun Park Yu
Spatiotemporal Estuarine Water Quality Parameterization Using Remote Sensing And In-Situ Characteristics, Kwisun Park Yu
Civil & Environmental Engineering Theses & Dissertations
This dissertation develops a new paradigm in a water quality monitoring approach to parameterize spatiotemporal estuarine water quality with sustainable reliability, less cost and less time. A key underpinning of this paradigm of the spatiotemporal estuarine water quality parameterization is various water quality parameters' interrelationship with ambient water temperature as a common factor, their time dependent characteristics, and spatiotemporal characteristics of remote sensing. It has two core models to provide input data of water quality parameterization model in a system; the transfer function models of the physical system and an analytical temperature time series model. The objective of this dissertation …
Flood Attenuation Studies, Michael Bruen, John O'Sullivan, Sangaralingam Ahilan, Zeinab Bedri
Flood Attenuation Studies, Michael Bruen, John O'Sullivan, Sangaralingam Ahilan, Zeinab Bedri
Reports
No abstract provided.
Catchment Modelling Tools And Pathways Review, Zeinab Bedri, Michael Bruen
Catchment Modelling Tools And Pathways Review, Zeinab Bedri, Michael Bruen
Reports
No abstract provided.
Feedback Between Residual Circulations And Sediment Distribution In Highly Turbid Estuaries: An Analytical Model, Stefan A. Talke, Huib E. De Swart, H. M. Schuttelaars
Feedback Between Residual Circulations And Sediment Distribution In Highly Turbid Estuaries: An Analytical Model, Stefan A. Talke, Huib E. De Swart, H. M. Schuttelaars
Civil and Environmental Engineering Faculty Publications and Presentations
Motivated by field studies of the Ems estuary which show longitudinal gradients in bottom sediment concentration as high as O(0.01 kg/m4), we develop an analytical model for estuarine residual circulation based on currents from salinity gradients, turbidity gradients, and freshwater discharge. Salinity is assumed to be vertically well mixed, while the vertical concentration profile is assumed to result from a balance between a constant settling velocity and turbulent diffusive flux. Width and depth of the model estuary are held constant. Model results show that turbidity gradients enhance tidally averaged circulation upstream of the estuarine turbidity maximum (ETM), …
An Idealized Model And Systematic Process Study Of Oxygen Depletion In Highly Turbid Estuaries, Stefan A. Talke, Huib E. De Swart, Victor De Jonge
An Idealized Model And Systematic Process Study Of Oxygen Depletion In Highly Turbid Estuaries, Stefan A. Talke, Huib E. De Swart, Victor De Jonge
Civil and Environmental Engineering Faculty Publications and Presentations
The sensitivity of oxygen depletion in turbid estuaries to parameters like freshwater discharge, depth, and sediment availability is investigated using an idealized model. The model describes tidally averaged circulation and suspended sediment concentration (SSC), which are input into an advection–diffusion sink module of dissolved oxygen (DO). Based on the analysis of field data collected in the Ems estuary, the modeled oxygen depletion rates are proportional to SSC. The model is calibrated to the observed variation of DO with SSC and temperature. Modeled DO closely tracks changes to the estuarine turbidity zone (ETZ): increased channel depth, decreased freshwater discharge, and decreased …