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Fish Passage Behavior Behavior Through Baffled And Nonbaffled Culvert, M. A. Khodier, Blake P. Tullis 2016 Utah State University

Fish Passage Behavior Behavior Through Baffled And Nonbaffled Culvert, M. A. Khodier, Blake P. Tullis

6ᵗʰ International Symposium on Hydraulic Structures

Culverts can have a negative impact on fish passage. Installing baffles inside culverts can potentially improve culvert fish passage by decreasing the flow velocity and increasing the flow depth. Fish passage behaviors of wild brown trout through a small prototype-scale (0.6 m diameter), 18.3 m in length, baffled, and non-baffled culverts were observed in the laboratory for a variety of discharges and pipe slopes (up to 6%). The baffle height and spacing was 0.15 and 0.9 times the culvert diameter, respectively. The correlation between successful fish passage, sample fish population, and the fish length was evaluated ...


The Role Of Physical And Numerical Modeling In Design Development Of The Priest Rapids Fish Bypass, T. C. Lyons, M. Politano, C. Dotson, L. J. Weber, D. Hay 2016 IIHR-Hydroscience & Engineering, University of Iowa

The Role Of Physical And Numerical Modeling In Design Development Of The Priest Rapids Fish Bypass, T. C. Lyons, M. Politano, C. Dotson, L. J. Weber, D. Hay

6ᵗʰ International Symposium on Hydraulic Structures

This paper describes a number of years of physical and numerical modelling that were instrumental in the development of the final fish bypass design at Priest Rapids Dam. Three physical models and multiple numerical models were used to guide the design of the fish bypass including its location on the dam, impact on forebay and tailrace flow patterns, intake configuration, design flow rates, flow control scheme, tailrace egress, potential for scour near the dam, potential impacts on total dissolved gas (TDG), impacts on spillway and powerhouse operation, and overall fish friendliness of the bypass.

Throughout those years of design work ...


Technical Developments In Fish Exclusion, Guidance, And Collection Materials, A. L. Peters 2016 Pacific Netting Products

Technical Developments In Fish Exclusion, Guidance, And Collection Materials, A. L. Peters

6ᵗʰ International Symposium on Hydraulic Structures

Construction of mills, dams and other structures in rivers and streams, and the withdrawal of water for irrigation or cooling industrial facilities vital to social and economic progress, have impacted the survival of marine life. Barriers and guidance or collection nets can protect fish and aquatic species while allowing water to flow unimpeded for commercial and industrial use. However, nets can attract aquatic growth, fill with debris, degrade with environmental stress, and be expensive to operate and maintain.

A closer look at the technical developments of materials and net designs in diverse settings can offer guidance that will be of ...


Study On The Proceeding Of Hydraulic Problem Of Simulating Natural Fish Passage, Zhijuan Wang, Qingyuan Yang, Minghai Huang, Yong He 2016 Yangtze Rizer Scientific Research Institute

Study On The Proceeding Of Hydraulic Problem Of Simulating Natural Fish Passage, Zhijuan Wang, Qingyuan Yang, Minghai Huang, Yong He

6ᵗʰ International Symposium on Hydraulic Structures

Fish passage in water conservancy projects is an important means of improving river connectivity, and reducing the impact on the ecological environment. Simulating natural fish passage, which aims at the purpose of the river ecological corridor by the means of ecological optimization on the structure and section type based on the traditional fish passage, is promoted and applied in recent years gradually. At the same time, the hydraulic research related to the simulating natural fish passage has made great progress. In this paper, we firstly collected and summarized the research experience of the domestic and foreign typical fish passage, analyzed ...


Application Of The Optical Flow Method To Velocity Determination In Hydraulic Structure Models, D. B. Bung, Daniel Valero 2016 University of Applied Sciences FH Aachen

Application Of The Optical Flow Method To Velocity Determination In Hydraulic Structure Models, D. B. Bung, Daniel Valero

6ᵗʰ International Symposium on Hydraulic Structures

Optical flow estimation is used in Computer Vision for detection of moving obstacles in a sequence of images. The optical flow (OF) is defined as the displacement of brightness patterns between two sequent images. In this paper,this method is applied to high-speed images taken in hydraulic structure models for determination of velocity fields.Water is seeded with tracer particles in two cases and is self-aerated in a third case. It will be shown that the OF method gives valuable results which compare well to other velocity measurements, e.g. by Particle ImageVelocimetry. The OF method is generally more time-consuming ...


Repair Of Failing Spirit Lake Outlet Tunnel At Mount St. Helens, J. P. Britton, S. K. Askelson, C. M. Budai, D. H. Scofield 2016 U.S. Army Corps of Engineers

Repair Of Failing Spirit Lake Outlet Tunnel At Mount St. Helens, J. P. Britton, S. K. Askelson, C. M. Budai, D. H. Scofield

6ᵗʰ International Symposium on Hydraulic Structures

The 18 May 1980 eruption of Mount St. Helens resulted in one of the largest debris avalanches recorded in history. The debris avalanche blocked the natural outlet of Spirit Lake. To prevent an uncontrolled and catastrophic lake break-out, the U.S. Army Corps of Engineers (USACE) constructed the Spirit Lake Outlet Tunnel from 1984 to 1985. Because Spirit Lake is located in the Mount St. Helens National Volcanic Monument, the project was transferred to the U.S. Forest Service (USFS) for ownership and management. During original tunnel construction, the most difficulty occurred within the 90-m-wide Julie and Kathy L. shear ...


South Channel Dam Rehabilitation Project - Successfully Addressing Dam Rehabilitation Challenges, M. D. Graeser, M. C. Jensen 2016 Alden Research Laboratory, Inc.

South Channel Dam Rehabilitation Project - Successfully Addressing Dam Rehabilitation Challenges, M. D. Graeser, M. C. Jensen

6ᵗʰ International Symposium on Hydraulic Structures

The Post Falls South Channel Dam is located on the Spokane River in Post Falls, Idaho. The concrete gravity dam was constructed in 1906 and was recently rehabilitated. The rehabilitation project included several design elements; the primary objectives were the replacement of the six spillway gates and hoists and significant rehabilitation of the concrete. The South Channel Dam rehabilitation encountered several challenges due to the age and condition of the existing structure, the large scale of the rehabilitation, and the location of the project. The concrete rehabilitation addressed several challenges which are presented in detail. The existing concrete consisted of ...


St. Mary Diversion Dam – Case Study Of A 100 Year Old Diversion, B. J. Heiner, J. Wagner 2016 U.S. Bureau of Reclamation

St. Mary Diversion Dam – Case Study Of A 100 Year Old Diversion, B. J. Heiner, J. Wagner

6ᵗʰ International Symposium on Hydraulic Structures

After 100 years of service, the St. Mary Diversion Dam is being replaced with a new design that will provide more effective fish passage and protection. The diversion is located in northern Montana, adjacent to the east side of Glacier National Park. It diverts water from the St. Mary River 1.21 km (0.75 mile) downstream of Lower St. Mary Lake. The existing 60.35-meter-long and 1.83-meter-high (198-foot-long and 6-foot-high) concrete weir diverts up to 24 cubic meters per second (850 cubic feet per second) design flow from the St. Mary River into the North Fork of the ...


Optimization Of Air Entrained Grout Enriched Roller Compacted Concrete For Improving Freeze-Thaw Resistance Of Hydraulic Structures, E. S. Musselman, R. J. Flynn, G. J. Zimmer, J. R. Young PE 2016 Villanova University

Optimization Of Air Entrained Grout Enriched Roller Compacted Concrete For Improving Freeze-Thaw Resistance Of Hydraulic Structures, E. S. Musselman, R. J. Flynn, G. J. Zimmer, J. R. Young Pe

6ᵗʰ International Symposium on Hydraulic Structures

Roller compacted concrete (RCC) is frequently used to construct gravity dams, stepped spillways, and to armor earthen embankments for passing extreme floods. Early experience on RCC dam applications in the 1980s showed a tendency for seepage to develop along the lift lines. Therefore, RCC dam designers started including an upstream facing system as a watertight barrier. An alternative facing material that has been used extensively overseas and is starting to gain more widespread acceptance in the United States is Grout Enriched RCC (GERCC). The grout enriched method of face construction has been shown to be less expensive than other facing ...


Evaluation Of Flexible Barrier And Sabo Dam To Control Effects Of Debris Flow In Santo Domingo Ravine, J. W. Cabrera Cabrera, L. F. Castillo Navarro 2016 Universidad Nacional de Ingenieria - Peru

Evaluation Of Flexible Barrier And Sabo Dam To Control Effects Of Debris Flow In Santo Domingo Ravine, J. W. Cabrera Cabrera, L. F. Castillo Navarro

6ᵗʰ International Symposium on Hydraulic Structures

Coast of Peru is characterized for the presence of ephemeral creeks which drain water only on wet season. The extremely dry soil and pebble combined with precipitation produce debris flow in a seasonal geodynamic. This is the case of Santo Domingo ravine which is located at eastern Lima, and drains their water to Rimac River. In this article the vulnerability of villages near to Santo Domingo ravine by debris flow and use of flexible barrier and sabo dams are analyzed. In a first stage, the liquid hydrograph to a 100 years return period was built and a solid hydrograph, a ...


Optimizing A New Flow Diversion Structure For The Planned Expanding Of The Spillway For The Malter Dam In Germany Using A Physical Hydraulic Model, J. Schmidt, J. Wieland, J. Jensen 2016 University of Siegen

Optimizing A New Flow Diversion Structure For The Planned Expanding Of The Spillway For The Malter Dam In Germany Using A Physical Hydraulic Model, J. Schmidt, J. Wieland, J. Jensen

6ᵗʰ International Symposium on Hydraulic Structures

The State Reservoir Administration of Saxony is planning to expand the spillway discharge capacity of the 102-year-old Malter Dam. After a catastrophic flood in 2002, updated hydrologic modeling indicated that the design discharges for the dam had increased significantly. As a result, the original spillway discharge capacity was insufficient to pass the revised design flows. A design concept was developed to add a second spillway and stilling basin to the dam, and to pass flow into this spillway using a novel vertical flow separator. The design and performance of this system was evaluated using a 1:25-scale physical model. The ...


Minimum Pressure Calculation Of Vortex For Stilling Basin With Step-Down Floor, Xia Quing-fu, Liu Zhi-ping, Guo Xin-lei 2016 China Institute of Water Resources and Hydropower Research

Minimum Pressure Calculation Of Vortex For Stilling Basin With Step-Down Floor, Xia Quing-Fu, Liu Zhi-Ping, Guo Xin-Lei

6ᵗʰ International Symposium on Hydraulic Structures

The horizontal vortex flow in the stilling basin with step-down floor is the special problem of hydraulics. In the horizontal vortex, the vortex flow streamline is assumed to be elliptical. According to the hydrodynamics of continuous and motion differential equations, the vortex pressure, vorticity, and other hydraulic characteristics are deduced in the vortex. The concept of velocity attenuation coefficient is proposed in this work, and a movement connection condition is established. The relationship between the minimum pressure of the vortex flow and the downstream water depth is studied, and a formula to calculate the minimum pressure is given. Compared with ...


Evaluation Of Spillway Stilling Basin Performance And Reservoir Sediment Flushing In A Physical Model Case Study: Due Hydroelectric Project In Ecuador, Ali Habibzadeh, Brian Hughes, Hernan Barahona 2016 Northwest Hydraulic Consultants Ltd.

Evaluation Of Spillway Stilling Basin Performance And Reservoir Sediment Flushing In A Physical Model Case Study: Due Hydroelectric Project In Ecuador, Ali Habibzadeh, Brian Hughes, Hernan Barahona

6ᵗʰ International Symposium on Hydraulic Structures

The Due Hydroelectric Project is a proposed 50 MW run-of-river hydroelectric project being developed by Hidroalto SA. The project will be located on the Rio Due in Ecuador. The civil works of the intake facility will be comprised of a 133.45 m wide diversion weir, with two overflow spillways and six gated sluice channels; a four bay intake structure with sediment excluder; and, a fish bypass facility. Northwest Hydraulic Consultants (NHC) evaluated the initial design of the Due intake and spillway facilities using a 1:35 Froude-scaled physical model for river discharges ranging from the intake design discharge of ...


Impacts Of Tailwater On The Design Of Several Stilling Basins In The Usa, L. E. Shearin-Feimster 2016 Schnabel Engineering

Impacts Of Tailwater On The Design Of Several Stilling Basins In The Usa, L. E. Shearin-Feimster

6ᵗʰ International Symposium on Hydraulic Structures

The dissipation of excess energy from flows exiting a spillway is often needed to prevent or reduce to acceptable levels conceivable negative impacts to the downstream channel, spillway, and dam (e.g., erosion, undermining). The optimization of a hydraulic jump type stilling basin using general purpose published design methodologies (i.e., USBR, SAF, etc.) for a project can be challenging, as these methodologies may not account for all site specific conditions and structure formulations by designers. Also, it is not often clear to a designer as to which flow rates (and corresponding flood events) will have the greatest influence on ...


Junction Chamber At Vortex Drop Shaft: Case Study Of Cossonay, G. Crispino, D. Dorthe, T. Fuchsmann, C. Gisonni, M. Pfister 2016 Seconda Universita Degli Studi Di Napoli

Junction Chamber At Vortex Drop Shaft: Case Study Of Cossonay, G. Crispino, D. Dorthe, T. Fuchsmann, C. Gisonni, M. Pfister

6ᵗʰ International Symposium on Hydraulic Structures

The drainage network of the city of Cossonay (Switzerland) is currently being adapted for future needs. In particular, it is required to drain increased storm discharges due to a population augmentation, and to provide an adequate concept to overcome unfavorable geotechnical conditions.

Vortex drop shafts are sewer manholes commonly applied in steep urbanized topographies to connect conduits across large elevation differences. In Cossonay, the existing 48 m high vortex drop shaft, with a diameter of 1.5 m, allowed the storm discharge to flow from the city to a watercourse issued at half of the valley height. The discharge capacity ...


Experimental Study Of Head Loss Over Laser Scanned Rock Tunnel, L. R. Andersson, I. A.S. Larsson, J. G.I. Hellstrom, P. Andreasson, A. G. Andersson 2016 Lulea University of Technology

Experimental Study Of Head Loss Over Laser Scanned Rock Tunnel, L. R. Andersson, I. A.S. Larsson, J. G.I. Hellstrom, P. Andreasson, A. G. Andersson

6ᵗʰ International Symposium on Hydraulic Structures

Flow in hydropower tunnels is characterized by high Reynolds number and often very rough rock walls. Due to the roughness of the walls, the flow in the tunnel is highly disturbed, resulting in large fluctuations of velocity and pressure in both time and space. Erosion problems and even partial collapse of tunnel walls are in some cases believed to be caused by hydraulic jacking from large flow induced pressure fluctuations. The objective of this work is to investigate the effects of the rough walls on the pressure variations in time and space over the rock surfaces. Pressure measurement experiments were ...


Numerical Investigation Of The Flow Field Inside A Manhole-Pipe Drainage System, Md Nazmul Azim Beg, Rita Carvalho, Pedro Lopes, Jorge Leandro, Nuno Melo 2016 University of Coimbra

Numerical Investigation Of The Flow Field Inside A Manhole-Pipe Drainage System, Md Nazmul Azim Beg, Rita Carvalho, Pedro Lopes, Jorge Leandro, Nuno Melo

6ᵗʰ International Symposium on Hydraulic Structures

Urban drainage networks contain a large number of structures. Manhole is the most common and the most important as it connects pieces of sewer pipes to form sewer networks. Understanding the hydraulics of a manhole-pipe drainage system is either important as this may sometimes become the bottlenecks of the sewer systems. In this study, the flow structure and flow hydraulics of a specific manhole-pipe sewer system was analysed numerically in view of further research to investigate sediment/ suspended solid transport in the system. The numerical model was compared with discharge and water pressure/depth data from experimental model. Different discharges ...


Effects Of Hydraulic Jump Motion On Air Entrainment In Closed Conduits, J. D. Mortensen, J P. Kubitschek 2016 United States Bureau of Reclamation

Effects Of Hydraulic Jump Motion On Air Entrainment In Closed Conduits, J. D. Mortensen, J P. Kubitschek

6ᵗʰ International Symposium on Hydraulic Structures

Air vent systems are designed to protect hydropower penstocks and reservoir outlets under various operating conditions. During an emergency closure of an upstream gate the hydraulic jump that forms downstream of the gate is not stationary and may advance downstream potentially increasing the total air demand. A lab-scale physical model of a general outlet works piping configuration was constructed at Reclamation’s Hydraulics Laboratory in Denver, CO to observe hydraulic jump behavior during emergency gate closures. Parameters including gate discharge, gate closure rate, air vent size, and downstream pipe pressure were tested at two different pipe slopes. Results indicate that ...


Determining Optimal Discharge And Optimal Penstock Diameter In Water Turbines, Arturo S. Leon 2016 Oregon State University

Determining Optimal Discharge And Optimal Penstock Diameter In Water Turbines, Arturo S. Leon

6ᵗʰ International Symposium on Hydraulic Structures

Minimizing water consumption for producing hydropower is critical given that overuse of flows for energy production may result in a shortage of flows for other purposes such as irrigation and navigation. This paper presents a dimensional analysis for finding optimal flow discharge and optimal penstock diameter when designing impulse and reaction water turbines for hydropower systems. The objective of this analysis is to provide general insights for minimizing water consumption when producing hydropower. This analysis is based on the geometric and hydraulic characteristics of the penstock, the total hydraulic head and the desired power production. As part of this analysis ...


Stepped Chute Training Wall Height Requirements, S. L. Hunt, K. C. Kadavy 2016 Hydraulic Engineering Research Unit

Stepped Chute Training Wall Height Requirements, S. L. Hunt, K. C. Kadavy

6ᵗʰ International Symposium on Hydraulic Structures

Stepped chutes are commonly used for overtopping protection for embankment dams. Aerated flow is commonly associated with stepped chutes if the chute has sufficient length. The aeration and turbulence of the flow can create a significant amount of splash over the training wall if not appropriately accounted for in the design of the structure. According to the United States Department of Agriculture (USDA)-Natural Resources Conservation Service (NRCS) Technical Release 60 Earth Dams and Reservoirs, a structural spillway should be designed to pass the freeboard hydrograph such that it does not cause serious damage to the embankment or the structure ...


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