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Predicting Riverbed Deformation During Floods For A Sustainable Design Of Headworks Structures, I. Joshi, U. Singh, M. B. Bishwakarma, Y. Kitamura, L. Lia

International Symposium on Hydraulic Structures

Understanding and predicting riverbed deformation during floods is important for the proper and sustainable design of headworks structures. Field-scale study of floods is challenging, and existing literature shows that mainly qualitative data (Photographic and Videographic) have been used in riverbed deformation studies. On the other hand, laboratory experiments allow studying floods in more detail and under a controlled environment. In this research, bed deformation of river channel during floods was investigated by conducting experiments in a curved flume. Parameters of the experiments were chosen with respect to gravel-cobbled River in Nepal. Four different floods with different magnitudes and durations were …

Introduction And Investigation Of A Large-Scale Piano Key Weir Fabricated Via Rapid Prototyping, M. Oertel, B. Belay, X. Shen, H. Willems

International Symposium on Hydraulic Structures

Piano key weirs (PKW) are novel hydraulic structures, characterized by an increased discharge capacity, compared to regular weirs. Through the last decades, experimental studies have mainly focused on efficiency aspects and design regulations. Therefore, often small scaled experiments were conducted in hydraulics laboratories in which model geometries were produced with materials like acrylic glass. But also in recent practices, 3D printing techniques are being used to plot small-scaled piano key weir configurations up to 30 or 40 cm width. The present investigation focuses on a large-scale 3D printed PKW with a total width of 1 m featuring quarter round crest …

Bed Load Computation For Gravel Particles In Gravel-Silt Mixture, U. K. Singh, S. Kumar, Z. Ahmad

International Symposium on Hydraulic Structures

Fluvial hydraulics deals with the process of erosion, transportation, and deposition of sediment in channels by the action of flowing water. This paper presents experimental results on bed load transport rate of gravel particles transported from mobile channel bed made of gravel-silt mixture. Gravel and sand particles were observed transported as bed load due to their coarser size while silt transported as suspended load. Bed load was collected at regular time interval of like 15 minutes, 30 minutes, 60 minutes, etc. Bed surface profile and water surface profile were measured spatially at an interval of 50 cm at the center …

A Numerical Investigation On Residual Energy Of Labyrinth Weirs, P. Langohr, B. M. Crookston, D. B. Bung

International Symposium on Hydraulic Structures

The replacement of existing classical weirs with labyrinth weirs is a proven techno-economical solution and a means to increase the discharge capacity when rehabilitating existing structures. However, flows exiting a labyrinth weir are complex, three-dimensional, and aerated; additional information is needed regarding energy dissipated by such weirs. In this study, three labyrinth weirs with different crest lengths were simulated with FLOW-3D HYDRO. Reynolds-averaged Navier-Stokes (RANS) modeling with the use of finite-volume method and Re-Normalisation Group (RNG) k-ε turbulence closure were employed. An attempt was made to more precisely account for the flow field in the downstream region. Consequently, the velocity …

Cfd-Based Modeling For Computing Discharge Coefficient Of An Ogee Spillway, Hariom Gautam, Zulfequar Ahmad, Pramod Kumar Sharma

International Symposium on Hydraulic Structures

The basic functionality of the spillway is to control the flow and safely convey the excess flow while keeping the structure stable. An ogee spillway is commonly used due to its high discharging capacity. The discharge coefficient of an ogee spillway is greatly affected by the ratio of an operating head and design head. Since physical models are expensive and have limitations in terms of scale effect, a comprehensive numerical simulation was performed in this study to estimate the discharge coefficient for an ogee spillway under various head ratios using CFD-based numerical modeling. The numerical simulations were done using FLOW-3D. …

Experimental Evaluation Of Drag Force On Different Shapes Of Pontoons At Different Water Stream Velocities At Specified Loads And Submergence, R. B. Deogade, H. R. Khandagale, M. Someshwara

International Symposium on Hydraulic Structures

The ability to cross both natural and man-made obstacles have always been crucial for good mobility and is vitally important for various operations. The series of Pontoons are used as floating bridge to allow the transport vehicles and personnel over water and marshy grounds. Floating bridges are cost-effective solutions for crossing large bodies of water with unusual depth. Friction drag is observed when relative motion exists between pontoon and fluid. In view of this drag force is required to be evaluated correctly so that arrangement to fix the pontoon can be accurately designed considering the load and safety factors. For …

Investigation On Near Bed Flow Features Over A Water-Worked Gravel Bed, Ellora Padhi, Nishank Agrawal

International Symposium on Hydraulic Structures

One of the key problems in the research on fluvial hydraulics is to correctly reproduce the flow dynamics over a riverbed in laboratory experiments. Generally, while performing experiments, attention is paid to specific hydraulic conditions related to the flow regime, sediment transport, and bed erosion. In this context, the sediment size of the riverbed to be analysed plays an important role. It is a common practice to create the bed manually using a screeded mixture of sediments with random orientation that could be very different from that observed in natural riverbeds. To overcome this issue, a manually created gravel bed …

Reynolds Stress Modelling Of Supercritical Flow In A Narrow Channel, S. Kadia, N. Rüther, E. Pummer

International Symposium on Hydraulic Structures

One of the most effective techniques to combat reservoir sedimentation, especially for small to medium-sized reservoirs, is the installation of Sediment Bypass Tunnels (SBTs). SBTs are designed for supercritical narrow open channel flow conditions. In such narrow channels, the walls and the free surface boundaries can influence the flow characteristics and form secondary currents. These vortex structures can alter the longitudinal velocity distribution and form velocity dip. Besides, they can also alter the bed shear stress distribution and influence the sediment transport. Such complex phenomenon can be modelled using Reynolds Stress Models (RSMs). In this study, the full Launder Reece …

Angle Effects Of Lidar Measurements On A Flat Surface And In High-Velocity Spillway Flows, R. Li, M. Kramer, S. Felder

International Symposium on Hydraulic Structures

Measurements in aerated high-velocity spillway flows have been traditionally conducted with point-source instruments. LIDAR is a promising remote sensing technology that may be able to provide more detailed insights into the free-surface properties. So far only one laboratory study has investigated the use of LIDAR technology in air-water flows on a spillway model showing that free-surface data in the aerated part of the flow can be recorded with high spatial and temporal resolution. However, the spillway model, as well as the aerated flow region, were quite short and further research is needed to test the performance of LIDAR technology on …

A Novel Dual Inlet Tangential Vortex Drop Shaft: An Analytical And Numerical Study, S. Mulligan, S. Pope

International Symposium on Hydraulic Structures

Urban drainage systems are undergoing substantial upgrades to enhance resilience to increased urbanisation, population growth and more intense rainfall events. Typically, in these hydraulic structures, the challenge of dropping water flows over significant elevation differences is overcome using vortex drop shaft structures. Many options are available for transferring flows from a single upstream channel to a lower level using independent vortex drop shafts. However, there are many cases where a manhole is to convey discharge from multiple flow inlets. In this work, a novel dual inlet tangential vortex drop shaft was developed during a full-scale commercial project proposal. The paper …

Recent Challenges In Design Of Spillway – An Indian Scenario, R. R. Bhate

International Symposium on Hydraulic Structures

There are about 5264 completed large dams in India. These dams are invariably equipped with some or other kind of spillway. As this dam building activity has been going on for many years, all easy sites have already been tapped and are left with sites where designers have to face challenges from nature. Recently, while harnessing the hydropower potential of Himalayan rivers, designers are facing issues like high sedimentation concentration flows, narrow valleys with a high magnitude of the flood, leading to the provision of an additional spillway or multi-tier spillways. Melting of glaciers resulting in increased rates of Glacial …

Faculty Senate Meeting, Agenda, October 31, 2022, Utah State University

Faculty Senate & Faculty Senate Executive Committee

• Call to Order
• Approval of Minutes - October 3 2022
• University Business
• Information
• USU Strategic Plan
• Educational Policies Committee - October 6, 2022
• Reports
• Academic Freedom and Tenure Committee Annual Report
• Athletic Council Annual Report
• Libraries Advisory Council Annual Report
• Old Business
• New Business
• Adjourn

Full Proceedings: Hydraulic Structures, International Association For Hydro-Environment Engineering And Research

International Symposium on Hydraulic Structures

No abstract provided.

Study Into The Sensitity Of The G-H Method To Blending Distance, Cory Goates, Doug Hunsaker

Browse all Datasets

A numerical lifting-line method (implemented in an open-source software package) is presented which can accurately estimate the aerodynamics of wings with arbitrary sweep, dihedral, and twist. Previous numerical lifting-line methods have suffered from grid convergence challenges and limitations in accurately modeling the effects of sweep, or have relied on empirical relations for swept-wing parameters and have been limited in their application to typical wing geometries. This work presents novel improvements in accuracy, flexibility, and speed for complex geometries over previous methods. In the current work, thin-airfoil theory is used to correct section lift coefficients for sweep, providing a more general …

Pausing While Programming: Insights From Keystroke Analysis, Raj Shrestha, Juho Leinonen, Albina Zavgorodniaia, Arto Hellas, John M. Edwards

Computer Science Student Research

Pauses in typing are generally considered to indicate cognitive processing and so are of interest in educational contexts. While much prior work has looked at typing behavior of Computer Science students, this paper presents results of a study specifically on the pausing behavior of students in Introductory Computer Programming. We investigate the frequency of pauses of different lengths, what last actions students take before pausing, and whether there is a correlation between pause length and performance in the course. We find evidence that frequency of pauses of all lengths is negatively correlated with performance, and that, while some keystrokes initiate …

Multiple Discharges Before Leader Inception In Long Air Gaps Under Positive Switching Impulses, Xiangen Zhao, Juhyeong Lee, Gang Liu, Lei Jia, Yang Liu, Junjia He, Yaping Du

Mechanical and Aerospace Engineering Faculty Publications

There are multiple corona bursts before leader inception when the rising rate of the applied voltage or electric field is not sufficiently high enough in long positive sparks. In existing studies, no attention has been paid to whether these corona bursts occur in the same location, and they are mostly considered directly as belonging to the same discharge. However, this paper presents that in a typical rod-plate long air gap, the multiple corona bursts before leader inception are distributed in at least two different locations, and the highest probability of three discharges occurs. Also, the discharge occurs with the highest …

Sustaining Water Conservation: A Synthesis Of Research On Motivators, Message Construction, And Tactics, Mahmudur R. Aveek, David E. Rosenberg

Civil and Environmental Engineering Student Research

Urban water managers face the challenge of sustaining conservation behavior. A review of 77 papers across water, energy, and environmental conservation was conducted to understand how programs encourage reduced water use. Motivators were external or internal. Theories of behavior change targeted different social-psychological factors. No single model addressed all aspects. Different message contents (water use, self-comparison, social comparison, leak information) and tactics (communication medium, frequency, program duration) reduced use by 0.5% to 25%. Reductions typically lasted less than a year. Quantifying the effects of specific motivators, message contents, and tactics was difficult due to varied contexts. Effective conservation messages included …

Faculty Senate Executive Committee Meeting, Agenda, October 17, 2022, Utah State University

Faculty Senate & Faculty Senate Executive Committee

AGENDA

3:30 Call to Order John Ferguson

Approval of Minutes – September 19, 2022

3:35 University Business Noelle Cockett, President | Larry Smith, Provost

3:50 Information

1. USU Strategic Plan . Noelle Cockett | Larry Smith | Robert Wagner
2. Educational Policies Committee – October 6, 2022 . Paul Barr

4:10 Reports

1. Academic Freedom and Tenure Committee Annual Report . Doug Ramsey
2. Athletic Council Annual Report . Ed Heath
3. Libraries Advisory Council Annual Report . Heloisa Rutigliano

4:25 Old Business

4:30 New Business

Adjourn:

Faculty Senate, Minutes, October 3, 2022, Utah State University

Faculty Senate & Faculty Senate Executive Committee

• Call to Order - John Ferguson
• Approval of Minutes - September 6, 2022
• University Business - Robert Wagner, Executive Vice President
• Information
• Educational Policies Committee - September 1, 2022 - Paul Barr
• General Education Subcommittee
• Academic Standards Subcommittee
• Curriculum Subcommittee
• Reports
• Educational Policies Committee Annual Report - Paul Barr
• Empower Teaching Excellence Annual Report - Travis Thurston | Neal Legler
• Old Business
• Code 401 Track Changes - Scott Hunsaker
• New Business
• Brief Overview of Senate Responsibilities | Orientation - John Ferguson
• Adjourn: 4:25 pm

The Utah Statesman, October 10, 2022, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

A Review Of Acceptance And Commitment Therapy For Adolescents: Developmental And Contextual Considerations, Julie M. Petersen, Patricia Zurita Ona, Michael P. Twohig

Psychology Faculty Publications

Acceptance and commitment therapy (ACT) offers a promising, transdiagnostic treatment approach for a wide range of mental health concerns in adolescents. Although research on ACT for adolescents is still developing, there is encouraging theoretical and empirical support in this area. The ability of ACT to adjust and account for developmental considerations and contexts in adolescence is discussed, alongside the theoretical support for using ACT with adolescents. A broad review of 34 studies on ACT with adolescents is then presented—ACT with adolescents has some preliminary support for anxiety, depression, disordered eating, chronic pain, and more. Detailed examples of how to implement …

Interaction Between Age And Fatigue On Antagonist Muscle Coactivation During An Acute Post-Fatigue Recovery Phase, Sara A. Harper, Brennan J. Thompson

Kinesiology and Health Science Faculty Publications

This study investigated the age-related changes in antagonist muscle coactivation of the biceps femoris (BF) during an acute recovery period following a leg extensor fatiguing protocol. Twenty-three young (mean ± SD: age = 25.1 ± 3.0 years) and twenty-three old men (age = 71.5 ± 3.9 years) participated. Surface electromyography (sEMG) was recorded from the BF muscles for antagonist muscle coactivation. Testing invovled participants performing leg extension isometric maximal voluntary contractions (MVCs) and isokinetic MVCs at 240°•s^-1 at baseline (Pre) and again after the fatigue protocol at 0 (Post0), 7 (Post7), 15 (Post15), and 30 (Post30) minutes post fatigue. …

Pace Oci Short-Wave Infrared Detection Assembly Frequency-Dependent Linearity Characterization And Uncertainty Analysis, Kenneth J. Squire, Jacob Hedelius, David K. Moser, James Q. Peterson, Eric T. Gorman, Emily Kan, D. Brent Mott, Ulrik B. Gliese, Gerhard Meister

Space Dynamics Laboratory Publications

The Ocean Color Instrument (OCI), the primary payload of the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) observatory, will collect data to monitor the health of Earth’s oceans and atmosphere. The Short-Wave Infrared (SWIR) Detection Assembly (SDA) was built and characterized by the Utah State University Space Dynamics Laboratory (SDL) and is a subsystem of OCI. The SDA measures seven bands centered at 940, 1038, 1250, 1378, 1615, 2130, and 2260 nm, with standard- and high-gain varieties for the 1250 and 1615 nm bands, resulting in nine total detection configurations in the SWIR. The delivery of high-quality science data is critically …

Infrared Spectral Responses Of The Ocean Color Instrument (Oci) Pre-Assembly And Integration, Jacob K. Hedelius, Kenneth J. Squire, James Q. Peterson, Branimir Blagojević, Ulrik B. Gliese, Eric T. Gorman, David K. Moser, Zakk Rhodes, Pedro Sevilla, Gerhard Meister

Space Dynamics Laboratory Publications

Spectral characterizations were made of the Ocean Color Instrument (OCI) short-wave infrared (SWIR) Detection Subassembly (SDS) responses (940–2260 nm) prior to their integration. Using modulated output light from a Fourier transform spectrometer, the in-band relative spectral responses of the nine different configurations of SDSs were found along with out-of-band (OOB) sensitivity. From these spectral responses, the center wavelengths (λ₀), full widths at half of the maximum, full widths at 1% of the maximum, and OOB rejection ratios were determined. All spectral parameters are within requirements. There are 2–8 repeats of each configuration, and the 1 σ spread among …

Educational Policies Committee, Agenda, October 6, 2022, Utah State University

Educational Policies Committee

• Approval of Minutes - September 1, 2022
• Subcommittee Reports
• Curriculum Subcommittee (Chad Simon)
• Course Approvals - 128
• Academic Standards Subcommittee (Renee Galliher)
• General Education Subcommittee (Matt Sanders)
• Minutes - September 20, 2022
• Other Business
• Curriculum Deadlines - Toni Gibbons
• Adjourn: 4:00 pm

Curriculum Committee, Agenda, October 6, 2022, Utah State University

Educational Policies Committee

• Approval of Minutes - September 1, 2022
• Program Proposals
• Semester Course Approval Reviews
• Other Business
• Curriculum Deadlines - Toni Gibbons
• Adjourn: 3:00 pm

Faculty Senate Agenda, October 3, 2022, Utah State University

Faculty Senate & Faculty Senate Executive Committee

• Call to Order
• University Business
• Information
• Educational Policies Committee - September 1, 2022
• Reports
• Educational Policies Committee Annual Report
• Empower Teaching Excellence Annual Report
• Old Business
• Code 401 Track Changes | Clean Version
• New Business
• Brief Overview of Senate Responsibilities | Orientation
• Adjourn: 4:30

Applying Expansive Framing To An Integrated Mathematics-Computer Science Unit, Kimberly Evagelatos Beck, Jessica F. Shumway

Publications

In this research report for the National Council of Teachers of Mathematics 2022 Research Conference, we discuss the theory of Expansive Framing and its application to an interdisciplinary mathematics-computer science curricular unit.

The Utah Statesman, September 26, 2022, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Faculty Senate Executive Committee, Minutes, September 19, 2022, Utah State University

Faculty Senate & Faculty Senate Executive Committee

• Individual Faculty Meetings
• Student Enrollment
• Educational Policies Committee Annual Report
• Empower Teaching Excellence Annual Report