Averaged indicators of secondary flow in repeated acoustic Doppler current profiler crossings of bends
نویسندگان
چکیده
منابع مشابه
Operating an Acoustic Doppler Current Profiler aboard a Container Vessel
Since October 1992 an acoustic Doppler current profiler (ADCP) has been in near-continuous operation on board a 118-m-long container vessel, the container motor vessel Oleander, which operates on a weekly schedule between Port Elizabeth, New Jersey, and Hamilton, Bermuda. The ADCP collects information on currents from the surface to depths as great as 404 m depending on zooplankton concentratio...
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flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
Inference of Tidal Elevation in Shallow Water Using a Vessel-Towed Acoustic Doppler Current Profiler
Vessel-towed acoustic Doppler current profilers (ADCPs) have been widely used to measure velocity profiles. Since the instrument is usually mounted on a catamaran floating on the surface, previous studies have used the water surface as the reference level from which the vertical coordinate for the velocity profile is defined. However, because of the tidal oscillation, the vertical coordinate th...
متن کاملAnalysis of Open-channel Velocity Measurements Collected with an Acoustic Doppler Current Profiler
Acoustic Doppler Current Profilers (ADCP’s) are easier to apply and more rapidly collect velocity data than traditional current-meter instruments. However, flow discharge estimates in natural rivers and canals based on ADCP measurements rely on extrapolations of the measured velocity profiles into the unmeasured zones of the flow. Furthermore, the accuracy and reliability of ADCP’s have not bee...
متن کاملSubtidal currents from a shipboard acoustic Doppler current profiler in tidally dominated waters
As part of a comprehensive study of inner shelf dynamics in the vicinity of a major estuary, we test the performance of a shipboard acoustic Doppler current pro/iter (ADCP). We compare velocities from the ADCP with those from current meters located 6 and 10 m below the surface in water shallower than 30 m. We find the ADCP suitable to estimate subtidal currents of 0(10 cm S-I) embedded in a tid...
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ژورنال
عنوان ژورنال: Water Resources Research
سال: 2005
ISSN: 0043-1397
DOI: 10.1029/2005wr004050