A Review Of Pesticide Fate And Transport Simulation At Watershed Level Using Swat: Current Status And Research Concerns, 2019 University of California, Davis
A Review Of Pesticide Fate And Transport Simulation At Watershed Level Using Swat: Current Status And Research Concerns, Ruoyu Wang
Environmental Fate And Impact Assessment Of Thiobencarb Application In California Rice Fields Using Ricewq, 2019 University of California, Davis
Environmental Fate And Impact Assessment Of Thiobencarb Application In California Rice Fields Using Ricewq, Ruoyu Wang
Pressure Loss Coefficients For Large Mitered Elbows With Diameters Ranging From 36-Inches To 144-Inches, 2019 Utah State University
Pressure Loss Coefficients For Large Mitered Elbows With Diameters Ranging From 36-Inches To 144-Inches, Hayden J. Coombs
All Graduate Theses and Dissertations
When designing a pipeline system, it is important to understand the pressure losses that will occur within the system. One common source of pressure loss is from elbow pipe fittings. There is extensive research available for pressure loss coefficients of elbow pipe fittings, but the research is derived from elbows with relatively smaller pipe diameters. The purpose of this research is to investigate pressure losses associated with larger diameter mitered elbows (36-inches to 144-inches). The dimensions for all mitered elbows considered in this research follow ANSI/AWWA C208-17 recommendations (AWWA 2017).
Due to the large size of the mitered elbows ...
Measuring Nitrogen Transformation In Wastewater Impacted Streams Using In-Situ Benthic Chambers, 2019 Utah State University
Measuring Nitrogen Transformation In Wastewater Impacted Streams Using In-Situ Benthic Chambers, Makenzi Beltran
All Graduate Theses and Dissertations
Acrylic chambers and metal frames were installed at the sediment-water interface of streams impacted by the effluent from wastewater reclamation facilities in order to determine nitrogen rates for nitrification, denitrification, assimilation, ANAMMOX, and DNRA. Each chamber was dosed with an isotopic form of nitrate (15NO3 - ), and both isotopic (15N) and non-isotopic (14N) samples were collected. The project locations included East Canyon Creek near the East Canyon Wastewater Reclamation Facility in Park City, Utah and Box Elder Creek near the Brigham City Wastewater Treatment Plant in Brigham City, Utah. Separate chamber measurements were conducted upstream and downstream ...
Side Shear Strength Of Preformed Socket Connections Suitable For Vertical Precast Members, 2019 Iowa State University
Side Shear Strength Of Preformed Socket Connections Suitable For Vertical Precast Members, Zhao Cheng, Sri Sritharan
Civil, Construction and Environmental Engineering Publications
Use of precast substructure in accelerated bridge construction (ABC) has been gaining popularity due to its advantages over traditional cast-in-place (CIP) construction. When using vertical precast members (e.g., columns and piles) in bridge substructure construction, they must be connected to the adjoining members (e.g., bent cap, pile cap, and abutment) reliably. To accomplish this goal and promote ease of construction, the preformed socket connection has been suggested. This connection is established by inserting the vertical precast member inside a preformed socket in the precast adjoining member and filling the socket with non-shrink, high-strength grout. Using specimens that modeled ...
Estimating Suspended Solids And Phosphorus Loading In Urban Stormwater Systems Using High-Frequency, Continuous Data, Anthony A. Melcher
All Graduate Theses and Dissertations
The introduction of pavement, buildings, and other impervious surfaces to urban landscapes greatly influences the quantity and quality of urban stormwater runoff. In this study, we designed and implemented modern stormwater monitoring technologies to establish a “smart” stormwater sensor network within the Northwest Field Canal (NWFC), an urban water conveyance located in Logan, Utah, USA. This network was designed to collect flow and water quality data at high frequencies and simultaneously at multiple locations. The observatory’s innovative method of inter-site communication and changing sampling frequencies during storm events was able to capture short duration events at the upstream and ...
Synopsis Of Engineers Without Borders (Ewb) Trip, Guatemala January 5 To January 12, 2019, Willis Weight
Engineers Without Borders
The Carroll Guatemala Engineers Without Borders (EWB) team assembled at a variety of locations from around the western USA before traveling together as a group into Guatemala City from a flight from Los Angeles. The flight from Los Angeles on Saturday morning departed about 11:00 AM local time. Two of us departed about 6:00 am from the Missoula airport (Willis Weight and Kennedy Bahm) and the following students: Ian Kirby, Josiah Groux, Amelia Schuver, Ericka Seehafer, Mary Van Dyke (health and safety officer), and Amber Pickering (project leader) came in from Portland, Seattle, and SLC). Professional mentor Ryan ...
Hyperspectral Image Analysis For Mechanical And Chemical Properties Of Concrete And Steel Surfaces, 2019 Missouri University of Science and Technology
Hyperspectral Image Analysis For Mechanical And Chemical Properties Of Concrete And Steel Surfaces, Liang Fan, Paul Manley, Huaishuai Shang, Abdullah Alhaj, Hongyan Ma, Genda Chen
According to the 2017 ASCE Report Card, 39% and 15% of 614,387 bridges in the U.S. are more than 50 years and 40 to 49 years, respectively. The number of deficient bridges is increasing. One of the most common causes of reinforced concrete deterioration is corrosion of steel reinforcing bars. Currently, most bridges are visually inspected every two years using boom/snooper trucks to get access to various areas to be inspected. The subjective visual inspection often leads to inconsistent results that are less useful in bridge management. Hyperspectral camera, installed on an unmanned aerial vehicle, can potentially ...
Review Of Fiber Optic Sensors For Structural Fire Engineering, 2019 Missouri University of Science and Technology
Review Of Fiber Optic Sensors For Structural Fire Engineering, Yi Bao, Ying Huang, Matthew S. Hoehler, Genda Chen
Reliable and accurate measurements of temperature and strain in structures subjected to fire can be difficult to obtain using traditional sensing technologies based on electrical signals. Fiber optic sensors, which are based on light signals, solve many of the problems of monitoring structures in high temperature environments; however, they present their own challenges. This paper, which is intended for structural engineers new to fiber optic sensors, reviews various fiber optic sensors that have been used to make measurements in structure fires, including the sensing principles, fabrication, key characteristics, and recently-reported applications. Three categories of fiber optic sensors are reviewed: Grating-based ...
Examining The Effect Of Multiple Route Choice Criteria On Hurricane Evacuation Traffic Through External Validation Of Simulations, 2019 Louisiana State University and Agricultural and Mechanical College
Examining The Effect Of Multiple Route Choice Criteria On Hurricane Evacuation Traffic Through External Validation Of Simulations, Haggai D. Davis Iii
No abstract provided.
Dynamics Of Bed Bug Infestations And Control Under Disclosure Policies, 2019 University of Pennsylvania
Dynamics Of Bed Bug Infestations And Control Under Disclosure Policies, Sherrie Xie, Alison L. Hill, Chris R. Rehmann, Michael Z. Levy
Chris R. Rehmann
Bed bugs have reemerged in the United States and worldwide over recent decades, presenting a major challenge to both public health practitioners and housing authorities. A number of municipalities have proposed or initiated policies to stem the bed bug epidemic, but little guidance is available to evaluate them. One contentious policy is disclosure, whereby landlords are obligated to notify potential tenants of current or prior bed bug infestations. Aimed to protect tenants from leasing an infested rental unit, disclosure also creates a kind of quarantine, partially and temporarily removing infested units from the market. Here, we develop a mathematical model ...
Battery-Free Wireless Strain Measurement Using An Antenna Sensor, 2019 Georgia Institute of Technology
Battery-Free Wireless Strain Measurement Using An Antenna Sensor, Yang Wang
A battery-free antenna sensor can wirelessly measure strain on a structure. Bonded to the surface of a base structure, the antenna sensor deforms when the structure is under strain, causing the antenna’s electromagnetic resonance frequency to change. This resonance frequency change can be wirelessly interrogated and recorded by a reader through electromagnetic backscattering. A radio frequency identification (RFID) chip on the sensor harnesses a small amount of energy from the interrogation signal and responds to the reader. The resonance frequency change identified by the reader is then used to determine the strain applied on the structure. The latest antenna ...
Microwave Self-Healing Technology As Airfield Porous Asphalt Friction Course Repair And Maintenance System, 2019 Technological University Dublin
Microwave Self-Healing Technology As Airfield Porous Asphalt Friction Course Repair And Maintenance System, Amir Tabakovic, Declan O'Prey, Drew Mckenna, David Woodward
A problem increasingly faced by airport authorities is the maintenance of runways. Due to their large aircraft loadings associated with take-off and landing operations, runways experience surface deterioration. Poor quality runway surfaces cannot be tolerated in such an environment. Maintenance issues must be carried out to maximise safety and minimise the risk of aircraft damage. A recent development has been the introduction of self-healing technologies such as rejuvenator encapsulation, induction and microwave heating to address these issues. This paper summarises a laboratory investigation to determine the effectiveness of microwave self-healing for crack repair of Porous Friction Course (PFC) used for ...
Concrete Grinding Residue: Its Effect On Roadside Vegetation And Soil Properties, 2019 Iowa State University
Concrete Grinding Residue: Its Effect On Roadside Vegetation And Soil Properties, Halil Ceylan, Yang Zhang, Bora Cetin, Sunghwan Kim, Bo Yang, Chenyi Luo, Robert Horton, Kasthurirangan Gopalakrishnan
Concrete grinding residue (CGR) is a slurry waste consisting of water and concrete fines generated from diamond grinding operations that is used to smooth a concrete pavement surface. During this process, CGRs are mostly disposed along the roadside, which can influence soils and plant communities along the roadways. To understand the effects of CGR on soil physical and chemical properties and plant growth, a controlled field site at the Kelly Farm in Iowa was used with CGR application rates of 0, 10, 20, and 40 dry ton/acre to test properties of soils and plants before the application and one ...
Large-Scale Performance Testing Of Temporary Sediment Basin Treatments And High-Rate Lamella Settlers, 2019 Iowa State University
Large-Scale Performance Testing Of Temporary Sediment Basin Treatments And High-Rate Lamella Settlers, Michael A. Perez, Wesley C. Zech, Jose C. Vasconcelos, Xing Fang
Sediment basins are temporary practices commonly used to detain stormwater runoff and capture suspended sediment on construction sites. A 79.0 m3 (2790 ft3) sediment basin testing apparatus at the Auburn University—Erosion and Sediment Control Testing Facility was used to provide a series of controlled and repeatable, large-scale tests to understand the performance of sediment basins and provide improvements. This research evaluated five sediment basin configurations over the course of 27 individual tests, including: (1) a standard configuration, (2) the addition of an excavated sump upstream of a ditch check, (3) the modification of the first baffle, (4) a ...
Performance Evaluations Of Three Silt Fence Practices Using A Full-Scale Testing Apparatus, 2019 Auburn University
Performance Evaluations Of Three Silt Fence Practices Using A Full-Scale Testing Apparatus, R. Alan Bugg, Wesley Donald, Wesley Zech, Michael A. Perez
Erosion and sediment controls on construction sites minimize environmental impacts from sediment-laden stormwater runoff. Silt fence, a widely specified perimeter control practice on construction projects used to retain sediment on-site, has limited performance-based testing data. Silt fence failures and resultant sediment losses are often the result of structural failure. To better understand silt fence performance, researchers at the Auburn University-Erosion and Sediment Control Testing Facility (AU-ESCTF) have evaluated three silt fence options to determine possible shortcomings using standardized full-scale testing methods. These methods subject silt fence practices to simulated, in-field conditions typically experienced on-site without the variability of field testing ...
Improving Access To Clean Water Through Service Learning, 2019 Purdue University
Improving Access To Clean Water Through Service Learning, Rachel E. Gehr, Tolu Odimayomi, Carolina Tornesi Mackinnon
Engagement & Service-Learning Summit: Connecting Through Listening & Scholarship
No abstract provided.
A Correlation Network Model For Managing Safety And Performance Issues In Bridges And Civil Infrastructures, 2019 University of Nebraska at Omaha
A Correlation Network Model For Managing Safety And Performance Issues In Bridges And Civil Infrastructures, Prasad Chetti
Student Research and Creative Activity Fair
Many recent studies have shown that a large percentage of bridges in many parts of the world have low safety rating. National Bridge Inventory (NBI) database contains the information of more than 600,000 bridges, where each bridge has 116 parameters. Current safety inspections require bridge inspectors to manually inspect each bridge every few years. Manpower and budget constraints limit such approach from inspecting the bridges more frequently. Clearly, more efficient approaches need to be developed to improve the process of bridge inspection and increase the overall safety of bridges and civil infrastructures. In this study, we propose a Correlation ...
Process Analysis For Disposal Of Surplus Property, 2019 University of Kentucky
Process Analysis For Disposal Of Surplus Property, Bryan Gibson, Christopher Van Dyke, Candice Y. Wallace, Jeff Jasper, Steven Douglas Kreis
Kentucky Transportation Center Research Report
The Kentucky Transportation Cabinet (KYTC) frequently acquires property to secure the right of way for transportation projects. Some property may eventually be declared excess and deemed surplus, enabling the Cabinet to dispose of it. Excess property can be declared surplus by an official order of the Secretary or Commissioner of the Department of Highways. Current law and policy require that KYTC undertake a 21-step process to dispose of surplus property, including reviews by the Governor, Finance and Administration Cabinet, and several KYTC personnel. The Cabinet lacks the personnel required to undertake the lengthy disposal process. This report provides background on ...
Webinar: Rethinking Streets For Bikes: An Evidence Based Guide Of Bike-Friendly Street Retrofits, 2019 University of Oregon
Webinar: Rethinking Streets For Bikes: An Evidence Based Guide Of Bike-Friendly Street Retrofits, Marc Schlossberg, Roger Lindgren
TREC Webinar Series
There is a growing demand for better infrastructure and fewer barriers to biking and other forms of space-efficient micromobility. Tackling daily trips by bike is easier on the environment, healthier for users and non-users alike, uses precious urbanized public and private land more efficiently, costs taxpayers less to build and maintain infrastructure, and when routes are safe and comfortable, moving by bike is also fun! Complete Streets policies are being adopted across the country, and there is an active conversation around the safety imperative of a Complete Streets approach. Yet, local officials often need both design guidance and the confidence ...