Intake System Assessment for Central Columbia River
Four intake systems (vertical traveling screens, infiltration beds, perforated pipes located above the stream bed in the river channel, and perforated pipes located above the bed in an...

Design of Fish Conserving Intake System
Biological tests were conducted to determine behavioral characteristics of saltwater fish indigenous to Southern California. The results of the tests were incorporated in the design of...

Bubbly Two-Phase Flow in Hydraulic Jump
Paper reports on an experimental study of the air-entraining roller zone of hydraulic jumps in open channels. Hot-film anemometry techniques were used, involving instant digitizing of...

Influence of Suction and Blowing on Entrainment of Sand Particles
The influence of suction and blowing on the rate of entrainment of sand particles was studied experimentally. For the range of grain sizes (130 - 570 μm) suction always reduced sediment...

Buoyant Forced-Plumes in Cross Flow
Buoyant forced-plumes in a neutrally stable cross flow were simulated in the laboratory flume. Saline solution was injected into the stream of fresh water to study the combined effects...

Vortex Suppression in Stilling Pond Overflow
Four siphons of square section with sides 24 mm (0.95 in.), 38 mm (1.5 in.), 50 mm (1.2 in.) and 62 mm (2.4 in.) were tested in a model stilling pond. The dimensionless critical submergence...

Surface Jet at Small Richardson Numbers
The spreading of a jet discharged horizontally at the surface of an initially quiescent water of larger density is treated analytically. The equations of continuity and of mass conservation...

Turbulent Entrainment in Buoyant Jets and Plumes
The behavior of turbulent buoyant jets in uniform density environments is found to be governed by an entrainment function and buoyancy function, both of which are functions of the local...

Simulation of Dispersion of Suspended Particles
The boundary condition at the bottom is assumed so that there is no particle entrainment in the flow from the bottom and there is no particle deposition on the bottom, i.e., particles...

Surface Jet Model for Heated Discharges
A system of equations is developed which, when solved numerically, predicts the jet trajectory, width, velocity, and temperature decrease for the case of a two-dimensional surface jet....

Gradually Varying Two-Layer Stratified Flow
The basic equations of stratified flow in fiords are outlined. The mechanism of entrainment is physically explained, and the entrainment is then related to the shear stress at the interface...

Buoyant Jets with Three-Dimensional Trajectories
A new integral method is devised to predict the hydrothermal behavior of buoyant jets discharged to infinite, flowing, stratified ambients through single submerged diffusers. The method,...

A Simple Model Of Entrainment And Theromocline Erosion

Two-Dimensional Surface Warm Jets
The dispersion of heat resulting from the horizontal discharge of a two-dimensional warm jet at the surface into a quiescent cooler ambient is investigated. The effects of source momentum,...

Efficiency of Air-Entraining Vortex Formation at Water Intake
The basic mechanisms for air-entraining vortices to form at a water intake are examined and vorticity arising in boundary layers is considered in detail. Theoretical expressions are developed...

Turbulent Diffusion and Entrainment in Two-Layer Flow
A layer of freshwater overriding a pool of seawater may extract salt from the pool by two mechanisms: (1) diffusion; and (2) entrainment. While diffusion is a two-way transport by which...

Surging in Laboratory Pipeline with Steady Inflow
Surges of head and discharge were studied experimentally in a laboratory pipeline which had check structures spaced at equal distances along the pipe. Surges developed when the downstream...

Performance Characteristics of Siphon Outlets
Results of model and prototype studies on the behavior of large siphon structures are presented. Energy losses, minimum tailwater elevation for priming, and general-flow patterns were...

Horizontal Two-Dimensional Density Current
The flow in the region of entrainment for a two dimensional horizontal density current was examined and was compared with that of the hydraulic jump, it has been shown that the depth of...

Sediment Transportation Mechanics: Initiation of Motion, Progress Report of the Task Committee on Preparation of Sedimentation Manuel, Committee on Sedimentation
Water flowing over a bed of sediment exerts forces on the grains that tend to move or entrain them. The forces that resist the entraining action of the flowing water differ according to...

 

 

 

 

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