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Effect Of Deficient Tailwater On The Performance Of Slotted Roller Bucket Of Indira Sagar Dam, Madhya Pradesh, Vankayalapati S. Ramarao, Amit Kulhare

International Symposium on Hydraulic Structures

Slotted roller bucket type energy dissipators are provided for spillways when the tailwater depth is 1.2 times the sequent depth required for the formation of a hydraulic jump. In slotted roller buckets, the dissipation of energy occurs by the lateral spreading of jet passing through bucket slots in addition to the formation of two complementary rollers as in the solid bucket. These are provided for spillways where the downstream river bed is of sound rock. However, when the tailwater levels are not realised during the release of floods over the spillway and surface and ground rollers are not formed, it …

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 …

Preliminary Evaluation And Design Of A New Energy Dissipation Stilling Basin Via Numerical And Experimental Modeling, F. Zabaleta, F. A. Bombardelli, S. A. Valbuena

International Symposium on Hydraulic Structures

Design of stilling basins for the dissipation of energy has been established by the seminal tests developed by the U.S. Bureau of Reclamation and the Saint Anthony Falls Laboratory, by mid XX century. Such designs basically include blocks and end sills, dentated or complete. However, those designs need variations in desertic zones, where the end sill is not allowed due to self-cleaning purposes, and no “drop” is possible for the same reason. In the case of the outlet structure for Perris Dam, located in the Riverside County, California, the design of the stilling basin was optimized using a Computational-Fluid-Dynamics (CFD) …

Physical And Numerical Model Studies For Hydraulic Design Of Stilling Basin As An Energy Dissipator Of A Spillway - A Case Study, B. S. Sundarlal, Vaishali Gadhe, S. R. Patnaik, Amol H. Gaikwad

International Symposium on Hydraulic Structures

The design of the stilling basin for a dam spillway is site specific and hydraulic model studies are required to be carried out for evolving the best possible design. A properly designed hydraulic jump stilling basin can ensure 60-70% dissipation of energy in the basin itself. Supported by hydraulic model studies and prototype experience, a suitable stilling basin caters to a variety of conditions covering discharge intensity, head, tail water variation, and topographical conditions. The most serious problem with hydraulic jump type dissipator is more structural strength rather than hydraulic efficiency. Experience in recent years gives many examples of stilling …

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 …

Submerged Flow Regimes Downstream Of A Weir At Multiple Slopes, K. S. Vikas, A. Sarkar

International Symposium on Hydraulic Structures

The higher water levels unanticipated at the time of floods are not generally considered in the design of hydraulic structures. The present study emphasizes the experimental investigation for the characterization of submerged flow regimes downstream of a rectangular sharp-crested weir at three different slopes (0, 0.004, and 0.008) that are possible with a laboratory flume. The classical flow patterns of submerged regimes, namely impinging jet, surface wave, surface jump, and surface jet regime, were analyzed. The experiments were conducted to examine the water profiles and the variations of different parameters, representing surface jumps and surface waves, with a gradual rise …

Perceptions Of Higher Education: Gender Differences In Utah Secondary School Students, Carlee Dynes, Emily S. Darowski, Susan R. Madsen

Marketing and Strategy Faculty Publications

According to 2020 US Census data, 20.6% of females 25 years or older have earned a bachelor’s degree, compared to 19.8% of men.¹ Within the same age group in Utah, females show the same pattern: 23.4% have earned a bachelor’s compared to 22.6% of males. Although statistics show gains in female educational attainment, females in Utah are more likely to have participated in some college with no degree (26.2%) or have an associate degree (11.1%), compared to males in Utah (24.9% and 8.8%, respectively). Additionally, although national rates show more females (13.0%) than males (12.4%) have earned graduate or …

Surface Velocities And Free-Surface Aeration In A Converging Smooth Chute During A Major Flood Event, H. Chanson, C. J. Apelt

International Symposium on Hydraulic Structures

In a free-surface spillway, the upstream flow is non-aerated and the flow becomes a strong air-water mix downstream of the onset location of air entrapment. Field observations were conducted over a large dam's spillway during a major flood event. The wastewaterway system was a smooth converging chute with a longitudinal slope of 11.3°: the Chinchilla Minimum Energy Loss weir on the Condamine River (Australia). Detailed quantitative measurements were undertaken in the high-speed chute flows with strong turbulence and high Reynolds numbers at the early part and later part of a major flood event. During this exceptional flood, the spillway passed …

Experimental And Numerical Investigation On Critical Submergence For Square Water Intakes, B. Das, Z. Ahmad, P. K. Sharma

International Symposium on Hydraulic Structures

Critical submergence for square water intakes in an open channel flow has been investigated experimentally and numerically in this paper. The depth of water at which the tail of a free surface vortex core just reaches the tip of an intake causing air entrainment is referred to as critical submergence. The formation of an air-entraining vortex in the vicinity of an intake is considered to be a severe problem for pumps. Experiments were conducted in a concrete flume of 9.47 m length, 0.5 m wide, and 0.6 m deep with an intake of size 0.04 m×0.04 m under uniform flow …

Hydraulic Behavior Of Spill Channel Of Polavaram Dam Spillway Without Left Embankment, Vankayalapati S. Ramarao, Yogendra Nath Srivastava

International Symposium on Hydraulic Structures

Spill channel is a flood disposing channel excavated on the downstream of spillway which joins the main river course. The purpose of spill channel is to divert the spillway released flood safely to the downstream river course. The alignment of the spill channel may be straight of curved or partially straight and partially curved. It may be in steep gradient or in flat gradient and subjected to supercritical flows or subcritical flows. While disposing of the flood, the flow conditions in the spill channel would be straight without cross waves. Water surface profiles in the convex and concave banks of …

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 …

Non-Intrusive Measurements Of Air-Water Flow Properties In Supercritical Flows Down Grass-Lined Spillways, H. Cui, S. Felder, M. Kramer

International Symposium on Hydraulic Structures

Grass-lined spillways constitute an environmentally friendly alternative to conventional concrete structures with flat slope and therefore may contribute to water-sensitive urban design. Research into supercritical self-aerated flows down grass-lined spillways has commenced recently, but important knowledge gaps related to air entrainment, flow resistance and bubble-canopy interaction are yet to be filled. This study presents first results of an experimental investigation into flows over a rough grass-lined channel bed with embankment slope. The deployed measurement instruments included acoustic displacement meters (ADMs) and a conventional intrusive phase-detection probe. A transformation of measured free-surface elevations into multiple time series of instantaneous air concentrations …

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.

The Utah Statesman, October 24, 2022, Utah State University

The Utah Statesman

Weekly student newspaper of Utah State University in Logan.

Certificate For Life Insurance, Bringing War Home

Bringing War Home Collection

Paper certificate for life insurance in good functional condition. Mass-produced by the U.S. government in the 1940s. Participant ID 00035, Object ID 00073

Canteen, Bringing War Home

Bringing War Home Collection

Metal canteen in good condition with some missing components. Mass produced in 1944 by the U.S. government. Participant ID 00036 , Object ID 00074

40th Infantry Division Year Book And Reunion Flag, Bringing War Home

Bringing War Home Collection

Paper and textile 40th infantry division yearbook in fair functional condition. The yearbook was mass produced by the Army and Navy Publishing Company in 1947. The division flag was handmade by a reunion group in 1982. Both were produced in the United States. Participant ID 00036, Object ID 00107

Mia Letter From The War Department, Bringing War Home

Bringing War Home Collection

Paper MIA letter from the War Department in good functional condition. Handmade by the U.S. government in 1942. Participant ID 00035, Object ID 00071

Letter From War Department, Bringing War Home

Bringing War Home Collection

Paper letter from the War Department in good functional condition. Handmade by the U.S. government in 1949. Participant ID 00035, Object ID 00072

Photographs While Stationed In Germany, Bringing War Home

Bringing War Home Collection

Photographs of the participant, his friends, and family. Taken while he was stationed in Germany in the 1970's. Made of paper in good, functional condition. Taken by the participant in 1976. Participant ID_00037, Object ID_00078

Photographs 101st Airborne Division, Bringing War Home

Bringing War Home Collection

Copies made of paper in good, functional condition. Handmade by the participant in 1968 in Vietnam. Participant ID_00042, Object ID_00092

Program From Congressional Medal Of Honor Celebration, Bringing War Home

Bringing War Home Collection

Celebration of life and honoring the participant's late father at the White House. Made of paper and textile in good, functional condition. Professionally produced by an unknown maker, time, and location. Participant ID_00039, Object ID_00084

Framed Photograph Of Jesus Arreola, Bringing War Home

Bringing War Home Collection

Framed photograph in good functoinal condition. The item was produced in 1945. Participant ID 00036, Object ID 00106

Tidwell Photo Album, Bringing War Home

Bringing War Home Collection

Paper photo album in good functional condition. Handmade by Ira Tidwell from 1944-1945. Participant ID 00036, Object ID 00108

Polish Uniform Hat, Bringing War Home

Bringing War Home Collection

Mass-produced hat made of textile, metal, and leather in good condition. It was purchased by the participant in October or November of 1992 in Germany, but produced in Poland between 1986-1992. Participant ID_00045, Object ID_00099.

Letters And Postcards From Sam Taylor, Bringing War Home

Bringing War Home Collection

Handwritten letters from Participant's father to his wife from 1954-1956. There was no active conflict at the time. Written in Okinawa, Japan on paper, in good condition. Participant ID_00043, Object ID_00093

Bulgarian Uniform Hat, Bringing War Home

Bringing War Home Collection

Hat made of textile and metal in good condition. Mass-produced in Bugaria between 1986-1992, and gifted to the participant around 1992 while in Germany. Participant ID_00045, Object ID_00100.

Effects Of Multisensory Input On Numerical Representations Of Diverse-Ses Preschoolers, Kerry Jordan

Funded Research Records

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 …