Eliminating Water Column Separation and Limiting Backspin at a 12,000-Horsepower Pumping Plant
Milwaukee's Water Pollution Abatement Program includes a deep tunnel system which collects combined sewage and street runoff during storms for later treatment when capacity is available...
Pressure-Time Flow Rate in Low Head Hydro Plants
Very few methods are accepted for measuring the flow in the large intakes typical of low head, run-of-the-river hydro plants. These intakes are characteristically short, non-uniform, non-prismatic,...
The Use of Piezoelectric Film in Cavitation Research
A research program was conducted at the St. Anthony Falls Hydraulic Laboratory to investigate impulse pressures caused by the collapse of transient cavitation bubbles. The impulse pressures...
Model-Prototype Conformance of a Submerged Vortex in the Intake of a Vertical Turbine Pump
Submerged vortices are commonly found in sump intakes of vertical turbine pumps. These vortices are known to cause increased vibration and at times degrade pump performance. Approach flow...
Simultaneous Flow Visualization and Hot-Film Measurements
High-speed video recording of flow visualizations in the near wall region of a turbulent open channel flow was synchronized with hot-film measurements of flow velocity and bed shear stress...
Non-Intrusive Experimental Setup for Inflatable Dam Models
A method which allows for a non-intrusive evaluation of the dynamic response of the inflatable dams under overflow and impounding water conditions is presented. The internal pressure variations...
A Computer-Controlled, Precision Pressure Standard
The operating principles as well as the technical aspects of the implementation of a precision pressure standard are presented here. The instrument can have dual use: either as a pressure...
Observations on the Growth of an Internal Boundary Layer with a Lidar Technique
The distribution of atmospheric water vapor across a step change in surface humidity (dry-wet) was observed by a Lidar measurement technique under neutral atmospheric stability condition....
Design and Execution of Hydrodynamic Field Data Collection using Acoustic Doppler Current Profiling Equipment
Proposed major changes to the navigation channel depth in the Cape Fear River prompted an investigation of the existing hydrodynamics of the river system. The observed data are to be used...
Instrumentation Needs and Possibilities: A Dialogue Between Suppliers and Users
The present symposium includes a panel discussion to address and illuminate needs and possibilities in hydraulic instrumentation. The panel discussion is organized with the intent of promoting...
Practical Method for Scour Prediction at Bridge Piers
A practical method is presented for prediction of local scour at bridge piers which is based on a comparison of many well known equations and supported by field data. This equation includes...
Practical Method for Calculating Contraction Scour
Total scour at bridge crossing waterways consists of long-term aggradation or degradation of the streambed, contraction scour and local scour at the piers and abutments. This paper will...
Frequency of the 1993 Flood in the Upper Mississippi River Basin
The frequency of the 1993 flood in the upper Mississippi River Basin is characterized by applying Bulletin 17B and L-moment methods to 111 unregulated watersheds in the basin. The analysis...
Brief Summary of National Bridge Scour Data Base
This paper briefly summarizes more than 470 measurements of local channel scour at bridge piers from 58 sites in 14 States. Relations between local scour and selected deterministic parameters...
Effects of Flow Duration on Local Scour at Bridge Piers in New York
The relation of local scour to the duration of high flows and other hydraulic properties is being studied at 31 bridge sites in New York State. Clear-water scour is common at most of the...
Ultimate Depth of Scour Around Bridge Piers
A design equation for estimating ultimate depth of local scour at bridge piers has been proposed which is based upon the envelope curves drawn to published field data covering a wide range...
Kent, Edward
In order to perform conservative scour analyses for coastal bridge sites it is necessary to develop realistic hydraulic simulations which provide worst case estimates of depth and velocity....
Bridge Pier Scour Equations - An Assessment
A comparative assessment of various bridge pier scour equations has been reported on the basis of analyzing a set of published prototype data from Indian rivers and other countries covering...
On the Erodibility of Rock and Other Earth Materials
An outline of a new method to determine the erodibility of rock and other earth and engineered earth material is presented. The method quantifies the relative capacity of the boundary...
Density-dependent Circulation in Desert-basin Aquifers with Isotropic Self-Similar Permeability Distributions
Closed-basin aquifers, typical of mountain chains in the western United States, present a central ephemeral lake (called `playa') where evaporation increases the local brine density creating...
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