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Testing Outlet Works Gates and Valves at USBR Dams Under Unbalanced Head Conditions: Close-coupled Guard and Regulating Gates at Yellowtail and Flaming Gorge Dam
Part of the U.S. Bureau of Reclamation (USBR) program for unbalanced testing of outlet works guard gates and valves at its dams involves testing facilities with 'close-coupled' guard and...

IRRICAD ? Computerized Irrigation Design
IRRICAD is a software program that helps irrigation designers by using a computerized systems approach to design. The program features drawing CAD input, interpolation of elevation data,...

FLUME 3.0: A Computer Program for Designing Flumes and Weirs
Long-throated flumes and broad-crested weirs are becoming the preferred measuring devices for use in irrigation canals. A computer program for calibrating these flumes and weirs has been...

BASIN 2.0 for the Design of Level-Basin Irrigation Systems
The purpose of this paper is to present a computer program for the hydraulic design of level-basin irrigation systems. The first of three design modes provides design based on the advance...

CPIVOT v 2.0 Center Pivot Analysis and Design Software
A micro-computer based software package is presented which can be used for hydraulic design and/or analysis of center pivot irrigation systems. The software is written in C and requires...

Flow Simulation for Surface Irrigation Design
Experience shows that even the most sophisticated and accurate computer models of the surface-irrigation process will not be widely used by design agencies unless they manifest a certain...

Short-Span Bridge Solutions
Large bridges get most of the headlines, but the nation's huge network of small bridges (many with spans of less than 25 ft) may be more in need of replacement. Age, corrosion,...

OCEA Goes Green
While spanning the range of civil engineering work, most of the nominees for this year's Outstanding Civil Engineering Achievement Award were either designed to clean the...

Closing the Loop
The 5.1 mi Cooper River Bridge, the longest in South Carolina, completes the I 526 Mark Clark Expressway around Charleston. It is a two-way, four-lane structure with the capability of...

The Influence of Slope and Surface Roughness on Trapezoidal Free Overfall Characteristics
The brink depth-discharge relationship for trapezoidal free overfalls was investigated including the effects of slope and roughness. The theoretical relationship is based on the momentum...

Hydraulic Desiltation for Noncohesive Sediment
Sedimentation reduces the useful life of a reservoir. The physical processes of flushing sediment are not well-understood. Flushing processes can be classified into two categories: local...

Flow Patterns in Constructed Wetlands
Wetland water flow is sensitive to evapotranspiration and rainfall, and to the internal configuration of substrates and biota. All wetlands are subject to significant dead zones and bypassing....

Research Needs in Hydraulic Engineering
The information presented herein has barely dented the surface of the needs for hydraulic research, and of the methods required to obtain funding for that research. The responses and reports...

Designing Self-Cleaning Wet Wells for Wastewater Pumping
Guidelines for the design of self-cleaning wet wells for variable speed pumps are given. The progress of research on the design of wet wells for constant speed pumps, including submersible...

Disaster Reduction in Dam and Reservoir Design
Disaster reduction for small- and medium-sized reservoir projects is considered for two specific types of dam failure: 1) during extremely high floods, and 2) when severe reservoir silting...

The Coyote Dam Outlet Works Replacement Project: Hazard Reduction
The Santa Clara Valley Water District's Coyote Dam faced three major concerns: siltation of the existing outlet; a fault that crosses the existing outlet pipe; and the dam toe and the...

Hydraulic Performance of Culvert End Sections Designed for Collision Safety
A type of end section for pipe culverts that was designed for collision safety has some favorable hydraulic characteristics. These safety end sections are long and narrow with large steel...

Compacted Spillway
The compacted spillway (CSW) refers to a spillway accompanied by jets located on its face to dissipate the excess energy. The (CSW) has a standard ogee profile with three jets located...

Equations to Predict Critical Submergence at Horizontal Hydraulic Intakes
The formation of free surface vortices at hydraulic intakes can disrupt operation and damage machinery. It is also a serious safety concern. Theoretical investigations and laboratory tests...

Hydraulic Analysis of the McCook Outlet Manifold
A 1:40-scale model of the proposed McCook Outlet Manifold was tested at the U.S. Army Engineer Waterways Experiment Station (WES). Subsequently, flow conditions in the manifold were calculated...

 

 

 

 

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