Download or read book Acoustic Velocity Meter Systems written by Antonius Laenen and published by . This book was released on 1985 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Accuracy of Acoustic Velocity Metering Systems for Measurement of Low Velocity in Open Channels written by Antonius Laenen and published by . This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Acoustic Velocity Meters for Gaging Discharge of Three Low velocity Tidal Streams in the St Johns River Basin Northeast Florida written by John V. Sloat and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustic Velocity Meter Systems written by Antonius Laenen and published by . This book was released on 1985 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory and Field Evaluations of Acoustic Velocity Meters at Davis and Parker Dams written by Tracy Vermeyen and published by . This book was released on 1995 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computation of Mean Velocity in Open Channels Using Acoustic Velocity Meters written by Eduardo Patino and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Feasibility of Acoustic Doppler Velocity Meters for the Production of Discharge Records from U S Geological Survey Streamflow gaging Stations written by Scott E. Morlock and published by . This book was released on 2002 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Acoustic Velocity Meters for Gaging Discharge written by John V. Sloat and W. Scott Gain and published by . This book was released on 1995 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparison Analysis and Estimation of Discharge Data from Two Acoustic Velocity Meters on the Chicago Sanitary and Ship Canal at Romeoville Illinois written by Charles S. Melching and published by . This book was released on 1993 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Feasibility of Using an Acoustic Velocity Meter to Measure Flow in the Chipps Island Channel Suisun Bay California written by Stuart Humphrey Hoffard and published by . This book was released on 1980 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tests were conducted in 1978 to determine the feasibility of using an acoustic velocity meter to measure the Sacramento-San Joaquin Delta outflow in the Chipps Island Channel, Suisun Bay, Calif. Three parts of transducers with frequencies of 100, 40, and 24 kilohertz were installed on a cross-channel test path and operated at three elevations, 15.5, 8.0, and 4.0 feet below mean lower low water, to test signal transmission at varying depths. Transmission was most reliable at the lowest depth, and the 24-kilohertz transducers at the 7-millivolt threshold of signal strength met the study 's criterion of no persistent signal loss of more than one hour 's duration in any phase of the tidal cycle. Signal strength was statistically correlated with the environmental factors of wind velocity, wind direction, solar insolation, electrical conductivity, water temperature, water velocity, stage, rate of change in stage, and the acceleration of the rate of change in stage. All correlations were weak. Signal strength is apparently a function of the interaction of several environmental factors. A 32-day test to observe if aquatic growth on the transducers would affect signal transmission showed no reduction in signal strength. Suspended-sediment samples indicated that both the size and concentration of particles are greater than presumed in earlier studies. According to the results of this study, chances are good for reliable transmission of acoustic velocity meter signals. Usually some signals were much stronger than the average 20-second signal strength at 15-minute intervals used for correlation and the frequency analysis. Superior equipment is now being developed specifically for the Chipps Island site to transmit signals several times stronger than the signals analyzed in these tests.

Download or read book Evaluation of Acoustic Doppler Velocity Meters to Quantify Flow from Comal Springs and San Marcos Springs Texas written by Marcus O. Gary and published by . This book was released on 2008 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Feasibility of Acoustic Doppler Velocity Meters for the Production of Discharge Records from U S Geological Survey Streamflow gaging Stations written by Scott E. Morlock and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Acoustic Velocity Meter written by Winchell Smith and published by . This book was released on 1967 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Acoustic Velocity Meters for Gaging Discharge of Three Low velocity Tidal Streams in the St Johns River Basin Northeast Florida written by John V. Sloat and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrometry Guidelines for the Application of Acoustic Velocity Meters Using the Doppler and Echo Correlation Methods written by British Standards Institute Staff and published by . This book was released on 1910-05-31 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrometry, Flow measurement, Liquid flow, Channel flow, Pipes, Doppler effect, Flowmeters, Ultrasonics, Acoustic measurement

Download or read book Improving Acoustic Doppler Velocity Meter Accuracy for Open Channel Discharge Measurement written by Daniel Justin Howes and published by . This book was released on 2010 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acoustic Doppler velocity meters (ADVMs) provide an alternative to more traditional flow measurement devices and procedures such as flumes, weirs, and stage-rating for open channels. However, the requirements for correct calibration are extensive and complex. In this dissertation, two original independent projects were undertaken to accomplish a similar goal: to improve the accuracy of ADVM without the need for in situ calibration. For the first, a 3D computational fluid dynamics (CFD) model is used to design a subcritical rapidly varied flow (RVF) contraction that provides a consistent, linear relationship between the upward-looking ADVM sample velocity and the cross-sectional average velocity, in order to improve non-calibrated ADVM accuracy. CFD simulations validated the subcritical contraction in a rectangular and trapezoidal cross section by showing errors within +1.8% and -2.2%. Physical testing of the subcritical contraction coupled with an upward-looking ADVM in a large rectangular flume provides laboratory validation with measurement errors within +/-4% without calibration. In the second project, an algorithm is developed for real-time estimation of the cross-sectional average velocity of a channel flow using an upward-looking pulsed wave ADVM. The Velocity Contour Weighting Method (VCWM) is applicable to gradually varied flows in prismatic channels (without the RVF contraction). VCWM estimates the average velocity as a weighted average of ADVM bin velocities. Weights are based partly on the flow geometry and partly on the velocity distribution sampled by the ADVM. Collectively, these two factors enable the VCWM to adapt to a relatively wide range of channel geometry and roughness features which fall within the range of those used to develop the algorithm. Expressions for the velocity weights are devised by first applying a validated 3D computation fluid dynamics (CFD) channel flow model to a wide range of flow scenarios including differing channel geometries, discharge rates, depths, and boundary roughness, which is then reduced empirically with the aid of dimensional analysis to obtain velocity weight equations. Application of the method to a large rectangular flume and field testing in trapezoidal irrigation canals shows that the VCWM predicts the average velocity with an error less than +/-5.5%.

Download or read book Using Acoustic Doppler Velocity Meters to Estimate Suspended Sediment Along the Lower Minnesota and Mississippi Rivers written by Joel T. Groten and published by . This book was released on 2019 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: