Hydraulic Engineering Commons^™

Modeling Target Disinfection By-Product Dynamics In Indoor Swimming Pools, Barnard S. Mondal, Cary Troy, Mehrnaz Afifi, Shih-Chi Weng, Ernest R. Blatchley Iii

The Summer Undergraduate Research Fellowship (SURF) Symposium

Chlorination is the primary disinfection method for swimming pools in the United States; however, chlorine also reacts with pollutants (e.g., sweat, urine and anthropogenic compounds) to form disinfection by-products (DBPs). Some DBPs are asthma causing (e.g. nitrogen-trichloride) and even carcinogens (e.g., trihalomethanes and nitrosamines). Consequently, exposure to DBPs poses health risks to patrons and staff in pool environments. Furthermore, volatilization of DBPs is enhanced by bather activity, but the relationship between activity and volatilization has yet been quantified such that the dynamic behavior of DBPs can be predicted. Therefore, the objective of this research is to …

Deep-Water Near-Bottom Turbulence In Lake Michigan: An Underwater Investigation, David J. Cannon, Cary Troy

The Summer Undergraduate Research Fellowship (SURF) Symposium

Motivated by a need to characterize near-bottom deep-water turbulence for an understanding of the filtration capabilities of invasive quagga mussels, an instrument tripod was deployed in Lake Michigan for six months in 60m of water to measure current velocities, with specific interest being paid to near-bottom (0.10 to 0.95 meters above bottom) velocities during the deployment. The deployment period (September 2012-April 2013) was characterized by very little stratification and a median temperature of about throughout the water column. A mean horizontal velocity of 3.6 cm/s with a standard deviation of 2 cm/s was also measured at 1 meter above the …

Operation And Modification Of A B-Stage For Efficient Nitrogen Removal In An A/B Process Pilot Study, Ryder Bunce

Civil & Environmental Engineering Theses & Dissertations

Hampton Roads Sanitation District's Chesapeake-Elizabeth Wastewater Treatment Plant is a High-Rate Activated Sludge (HRAS) plant with no primary clarifiers. The plant operates at an SRT of 1.5 - 2 days and does not perform biological nitrogen removal (BNR). By 2021 HRSD anticipates the plant will be included in a bubble permit, resulting in a total nitrogen (TN) effluent target of approximately 5-8 mg/L. Converting the plant to a conventional BNR process would require a significant increase in reactor volume. Capital costs for the upgrade are estimated at 125 -150 million dollars, with a dramatic increase in operating costs as well. …

Optimization Of Demon® Sidestream Treatment And Potential For Anammox Mainstream Bioaugmentation, Andrea Lauren Nifong

Civil & Environmental Engineering Theses & Dissertations

Anaerobically digested sludge dewatering liquors (e.g. centrate) can represent 15-25% of the total kjeldahl nitrogen (TKN) load on a typical municipal waste water treatment plant (WWTP). Sidestream nitrogen removal has been demonstrated to be an effective tool for improving nitrogen removal performance and reliability with a savings in aeration energy, chemicals (supplemental alkalinity and carbon), and sludge production.

Deammonification, partial nitritation by ammonia oxidizing bacteria (AOB) combined with anaerobic ammonium oxidation (AMX or anammox), provides near complete nitrogen removal with a 65% reduction in energy and 100% reduction in supplemental carbon and alkalinity requirements as compared to traditional nitrification-denitrification. The …

Identification Of Pipelines From The Secondary Reflect Wave Travel Time Of Ground-Penetrating Radar Waves, Kun-Fa Lee, Tan-K Wang1, Yu-Ming Kang, Cheng-Sung Wang, Kuo-An Lin

Journal of Marine Science and Technology–Taiwan

When using ground-penetrating radar to identify underground pipelines of similar dielectric constants (i.e. PE and PVC), misidentification is quite common. In this study, we apply reflected travel time of radar waves into the PE- and PVC- dielectric constants and the differentiation becomes possible. We have conducted the experiments using the nonmetal PE- and PVC- pipelines as well as the heavy metal (iron) pipelines in a water environment. Based on a travel- time calculation, the dielectric constants of non-metal pipelines with similar composition (PE ＝ 2.3 and PVC ＝ 3.0) were quite close. The error between the experimental and theoretical values …

Functional Ontologies And Their Application To Hydrologic Modeling: Development Of An Integrated Semantic And Procedural Knowledge Model And Reasoning Engine, Aaron Range Byrd

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In hydrology we straddle the domains of science and engineering. As hydrologists our goal is to predict the movement and volume of water. As scientists we seek to improve our understanding of water-related processes and how to model them. As engineers we seek to be able answer specific water-related questions to provide protection and an essential resource for the people we serve. Underlying all of our work is a body of knowledge that we have developed and continue to develop. This knowledge involves many aspects, such as the role of various hydrologic processes, how to obtain data, computational models that …

Risk Assessment Model For Pipe Rehabilitation And Replacement In A Water Distribution System, Jan C. Devera

Master's Theses

The efficient delivery of potable water for a community through its distribution system has historically been the backbone of nearly all metropolitan developments. Much of these systems are comprised of pipe networks made of various materials including concrete, iron, PVC, and even steel. As these communities expand and urbanize, water demand and population density simultaneously increase. This develops higher strains and stresses in the community‟s water distribution network causing pipes to corrode, crack, or rupture prematurely while in service. As a result, the deterioration of water distribution systems in growing cities is increasingly becoming a major concern for our nation. …

Agenda: Changing Regulatory Frameworks For Shale Development And "Social License To Operate", University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment

Changing Regulatory Frameworks for Shale Development and "Social License to Operate" (July 24)

Rapid development of unconventional shale resources in recent years has raised a series of regulatory issues both here and abroad. Because of the "distributed" nature of shale development and the significant increase in wells in key basins, local land-use conflicts have also erupted in certain areas of the country, leading to restrictions and moratoria on drilling by state, county, and municipal governments and raising questions about the industry's continued social license to operate in key jurisdictions. This moderated panel discussion will assess the current regulatory framework governing shale gas development and the changing dynamics among federal, state, and local regulation …

Velocity Measurements Of The Flow Over A Gate-Controlled Weir Structure, Mohamed M. Jalloh

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

The South Florida Water Management District (SFWMD) uses G304 control structures to manage flow into and out of a large storm-water treatment area (STA). These structures consist of a lateral unsuppressed weir, a sluice gate and a corrugated culvert for flow control and transfer through an embankment. For better flow control in the STAs, it is imperative to accurately measure the discharge through the G304 control structures and to determine the approach velocity over the weir for different field scenarios.

Flow behavior of the G304 structure was examined in a prototype during two days of testing for two canal headwater …

Numerical Investigation On The Effects Of Wave Grouping On The Motion Of Moored Ddms Platform, Xing-Gang Wang, Zhao-Chen Sun, Shu-Xiu Liang, Si Liu, Shu-Xue Liu, Jun-Bin Luo

Journal of Marine Science and Technology–Taiwan

The random wave groups with the same wave parameters, such as significant wave height, period and overshoot parameter, but with different wave groupiness are simulated by an empirical wave envelope spectrum involved the group height factor GFH and group length factor GLF based on field measured sea waves. A geometrically nonlinear finite element method based on the total Lagrangian formulation is developed to calculate the mooring-line dynamics. Coupled dynamic analysis of DDMS (Deep Draft Multi-Spar) platform and the attached mooring lines under the action of wave groups with different groupiness in deep water is executed in time domain. The effects …

Agenda: Water, Oil And Gas: Recycling And Reuse Of Water, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment. Intermountain Oil And Gas Bmp Project, Rocky Mountain Land Use Institute, Sturm College Of Law, University Of Denver, Colorado Bar Association, Natural Resources & Energy Section

Water, Oil and Gas: Recycling and Reuse of Water (June 11)

Program co-chairs: Sarah Klahn, Matthew Sura; planning committee: Susan Daggett, Kathryn Mutz.

Co-sponsored by: Getches-Wilkinson Center for Natural Resources, Energy and the Environment, University of Colorado Law School, Rocky Mountain Land Use Institute, Sturm College of Law, University of Denver, Natural Resources & Energy Section of the Colorado Bar Association.

This program is the second in a 3-part series focusing on critical water, oil and gas issues in Colorado. This second program focuses on the technology behind the recycling of produced water and hydraulic back fracturing flowback fluid and the issue of mandatory recycling. It also addresses the legal implications …

Residential Fire Sprinkler Design For The Phi Kappa Psi Fraternity House, Nolan Frost

BioResource and Agricultural Engineering

This senior project discusses the design of a residential fire sprinkler system for a local fraternity house. The design follows NFPA 13D code, and contains design calculations, design drawings, material specifications, and cost analysis. The design was completed with the intention of being used for the installation of a fire sprinkler system in the house.

Design, Construction, And Evaluation Of A Hydraulic Oil Filtration Cart, Eric Steiger

BioResource and Agricultural Engineering

This report discusses the design, construction, and evaluation of a hydraulic oil filtration car sponsored by Papich Construction Inc. This company developed the need for a filter cart system to service equipment by flushing and cleaning the oil in hydraulic reservoirs and systems. The opportunity of reviewing an existing product from Caterpillar was taken to obtain basic design parameters. This car however, did not meet all the needs preferred by the service technicians of Papich; thus leading to the idea of a custom filter cart.

The filter cart is composed of a square tube frame sitting on pneumatic no-flat castor …

Army Corps Of Engineers, U.S., Bert Chapman

Libraries Faculty and Staff Scholarship and Research

Provides an overview of how the U.S. Army Corps of Engineers has influenced historical and contemporary economic, environmental, and political developments in the American West.

Aridity, Bert Chapman

Libraries Faculty and Staff Scholarship and Research

Provides an overview of how aridity in the American West has influenced that region's economic, environmental, and political development and U.S. Government policies in this region.

Colorado River Compact (1922), Bert Chapman

Libraries Faculty and Staff Scholarship and Research

Provides an overview of the 1922 Colorado River Compact seeking to fairly distribute Colorado River water to Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming and their increasing populations.

Hydroelectric Power, Bert Chapman

Libraries Faculty and Staff Scholarship and Research

Provides a historical overview and contemporary analysis of the advantages and disadvantages of federal government support for hydroelectric power in the American West.

Flow And Geometry Measurements At An Active Knickpoint, Clark W. Kephart

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

Channel degradation is an area of growing concern in areas of the Midwestern United States where there are large deposits of loess soils. Channel degradation occurs as a result of disturbances to the sediment load, bed soil configuration, and hydraulic characteristics of the stream (i.e. discharge, channel slope and geometry). These changes may occur suddenly or slowly over time. A given disturbance may be due to a large rain event, channel adjustments (i.e. dredging and straightening), and changes in land use around the stream (Chen et al. 1999).

A knickpoint is an abrupt drop in stream bed elevation over which …

A Model Of Return Flow Recovery System In Paddy Field Base On Gis, Yu-Chuan Chang, Shih-Yi Fan, Jen-Yan Chen, Chun-E Kan

Journal of Marine Science and Technology–Taiwan

In this study, return flow in a paddy field was simulated in order to supply reuse water to industries. Field experiment and historical data were obtained for a two-tank model parameter estimation and verification. The selected boundary of paddy fields was identified based on GIS. The simulation results showed that the reasonable reuse flow rate corresponding to the area of 6,036 ha in the first crop season and 1,994 ha in the second crop season. The volumes of the return flow and reuse water are 18.74 × 106 and 15.52 × 106 t, respectively. However, the pattern of rainfall, active …

Agenda: Water, Oil And Gas 101, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment. Intermountain Oil And Gas Bmp Project, Rocky Mountain Land Use Institute, Sturm College Of Law, University Of Denver, Colorado Bar Association Cle, White & Jankowski, Llp

Water, Oil and Gas 101 (April 10)

Program co-chairs: Sarah Klahn, Matthew Sura; planning committee: Susan Daggett, Kathryn Mutz.

This full-day program, cosponsored by the Rocky Mountain Land Use Institute (Sturm College of Law, University of Denver), the Colorado Bar Association CLE, and White & Jankowski, LLP, was the first of a 3-part series focusing on water, oil and gas issues of critical interest in Colorado.

The first program provided an overview of the pertinent law and issues generated when the water, oil and gas industries interact; and addressed water quality concerns and the purchasing of water from municipalities for hydraulic fracturing and drilling. Program #2 is …

El Agua En Granada / Water In Granada, Spencer Lacy

Spain: Language, Community, and Social Change

I am a junior in college studying civil engineering with a focus in water resources at the University of Colorado at Boulder. My entire life I have been surrounded with water and rivers. I began kayaking as a toddler in the Colorado rivers and have spent a large part of my life living, playing, exercising, and working in rivers. My grandfather is a civil engineer who owns a water resource company, my father is a civil engineer who designs whitewater kayak courses all over the world, and my older brother recently graduated from CU after studying civil engineering and is …

Building Upon Common-Pool Resource Theory To Explore Success In Transitioning Water Management Institutions, Christina M. Hoffman

School of Natural Resources: Dissertations, Theses, and Student Research

Nebraska, like many regions around the world, is faced with the challenge of adapting to a new era in water management. Increasing demands for water resources, mounting concerns over threatened and endangered species, and obligations to abide by interstate water allocation agreements have motivated Nebraska to revisit traditional water management approaches. However, although Nebraska’s water management institutions have undergone much change, little research exists on the influence these changes have had on the ability of water institutions to successfully manage water allocations. This research (1) qualitatively explores the perspectives and experiences of stakeholders in the overappropriated region of the Platte …

Agenda: What The Frack? How Your Investments Can Impact The Fracking Industry, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment. Intermountain Oil And Gas Bmp Project, Sustainable Impact Investment Advisors

What the Frack? How Your Investments Can Impact the Fracking Industry (March 13)

Sustainable Impact Investment Advisors, a professional association of investment advisors whose practices focus on sustainable and socially responsible investing, sponsored a panel conversation on hydraulic fracking. A panel of experts, including industry representatives and grass roots opponents, discussed the pros and cons of fracking. The panel provided an overview of fracking, and food for thought about whether you choose to include this industry in your investments, or influence companies to use this technology with only the utmost care.

Preparing Nebraska Future Water Leaders: Nwla Academy Class Iii (2013), Connie I. Reimers-Hild

Nebraska Water Leaders Academy: Publications and Materials

Group communications, Phyllis Schoenholz, UNL

Communication and transformational leadership. Dr. Mark Burbach and Dr. Connie Reimers-Hild, UNL

Nebraska's instream flow laws and applications, Ann Bleed, board member, Lower Platte Natural Resources District

River Basin Compacts; Nebraska's obligations, Michael Jess, water resources engineer; consultant.

Conservation along the Central Platte, Mark Peyton, senior biologist, Central Nebraska Public Power and Irrigation District

Central Platte River water issues in regard to habitat for endangered species, Jason Farnsworth, natural resources specialist, Headwaters Corporation & Jerry Kenny, executive director of the Platte River Recovery Implementation Program

Rowe Sanctuary; discussion and viewing …

Modeling Flood Reduction Scenarios For A Small Coastal Community, Evan J. Perez

Master's Theses

The Arroyo Grande Creek Watershed, an approximately 170 mi² watershed located on the central coast of California, drains to the Pacific Ocean via the Arroyo Grande Creek that passes through several coastal cities including the community of Oceano. At the mouth of the Creek is the Arroyo Grande Lagoon, which is connected to another lagoon known as the Oceano Lagoon, by a tidal flap-gate whose hydraulics is a function of water levels in the two lagoons. Historically the Oceano Lagoon has played a part in floods that have occurred in the community of Oceano. The most recent flooding occurred …

Hydrologic Modeling Of The San Joaquin Valley Watershed For Purposes Of Nitrate Analysis, Stephen Carl Clayton

Master's Theses

The San Joaquin Valley is regarded as one of the most productive agricultural regions in the world. This extensive agriculture has, however, caused extensive pollution of both ground water and surface water. This thesis develops a hydrologic model of the surface and ground waters of the San Joaquin Valley. Such modeling is useful in the development and implementation of water quality regulations such as Total Maximum Daily Loads (TMDLs). A properly validated watershed simulation model can supplement data collection and can account for watershed characteristics including topography, soils, climate, land cover, anthropogenic activities, as well as simulate watershed responses including …

2013 Nebraska Water Monitoring Programs Report, Marty Link, Joe Kenning

Nebraska Department of Environmental Quality: Reports

The Nebraska Department of Environmental Quality (NDEQ) is charged with monitoring, assessing, and to the extent possible, managing the state’s water resources. The purpose of this work is to protect and maintain good quality water and encourage or execute activities to improve poor water quality. Monitoring is done on the over 16,000 miles of flowing rivers and streams, our greater than 148,000 acres of surface water in lakes and reservoirs, and the vast storage of groundwater in Nebraska’s aquifers.

Tackling Change: Future-Proofing Water, Agriculture, And Food Security In An Era Of Climate Uncertainty, Peter G. Mccornick, Vladimir Smakhtin, Luna Bharati, Robyn Johnston, Matthew Mccartney, Fraser Sugden, Floriane Clement, Beverly Mcintyre

Daugherty Water for Food Global Institute: Faculty Publications

In 1950 the global population was just over 2.5 billion. Now, in 2013, it is around 7 billion. Although population growth is slowing, the world is projected to have around 9.6 billion inhabitants by 2050. Most of the population increase will be in developing countries where food is often scarce, and land and water are under pressure. To feed the global population in 2050 the world will have to produce more food without significantly expanding the area of cultivated land and, because of competition between a greater number of water users, with less freshwater. On top of land and water …

Occurrence Of Antimicrobials And Antimicrobial Resistance Genes In Beef Cattle Storage Ponds And Swine Treatment Lagoons, Yuping Zhang, Chiqian Zhang, David B. Parker, Daniel D. Snow, Zhi Zhou, Xu Li

Nebraska Water Center: Faculty Publications

Livestock manure treatment and storage structures are potential environmental sources of antimicrobials and antimicrobial resistance genes (ARGs). In this study, the occurrence of antimicrobials and ARGs was investigated in the water and the sludge compartments of beef cattle storage ponds and swine lagoons. Analysis was focused on two families of antimicrobials (sulfonamide and tetracycline) and the corresponding ARGs (sul1, sul2, tetO, tetQ and tetX). Results showed that the pseudo-partitioning coefficients of tetracyclines were higher than those of sulfonamides, suggesting different distributions of these two classes of antimicrobials between water and sludge. The ARGs tested were …

Investigation Of Usage Of Velocity And Pressure Data Within A Water Distribution Lab Model For Calibrating Hydraulic Models, Robert Craig Ashby

Theses and Dissertations--Civil Engineering

Water distribution modeling for hydraulics and water quality is an important tool for managing system performance of water utilities. An important component of a water distribution model is the calibration of a network model with field data in the real world system. The calibration effort requires a protocol or selection criteria for the location of field measurements that best support the calibration effort. A water distribution model was constructed at the University of Kentucky hydraulics lab for the purpose of investigating the performance of water distribution models. The lab model contains numerous hydraulic (pressure, flows) and water quality (concentrations) sensors …