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http://dx.doi.org/10.3741/JKWRA.2005.38.10.811

Velocity and Discharge Measurement using ADCP  

Lee, Chan-Joo (Korea Institute of Construction Technology)
Kim, Won (Korea Institute of Construction Technology)
Kim, Chi-Young (Korea Institute of Construction Technology)
Kim, Dong-Gu (Korea Institute of Construction Technology)
Publication Information
Journal of Korea Water Resources Association / v.38, no.10, 2005 , pp. 811-824 More about this Journal
Abstract
The ADCP is an instrument based on Doppler effect, which measures discharge of a river in a short time while crossing it. In this study we aim to make a comparison of the discharge results from a moving-vessel ADCP with those measured by velocity-area method at the same cross-section, and to investigate the characteristics of velocity and discharge data using ADCP. Bathymetry measured by ADCP almost coincides with that by direct depth measurements. Because velocity data from ADCP are essentially instantaneous, individual velocity profiles obtained by ADCP are rather different from time-averaged velocity profiles. But spatially averaged velocity profiles of the individual ADCP data near the comparable verticals have similar vertical velocity pattern with the time-averaged ones. The average velocity profile from repeatedly crossed data is also similar with the time-averaged one. In case of the velocity distribution, individual and spatially averaged data for the sub-width of mid-section method Have good agreement with those by velocity-area method. Discharge data determined by averaging several ADCP measurement transects have $0.1\%{\~}9.3\%$ of difference with those from velocity-area method, and as the number of measurement increases, the relative difference to the velocity-area method decreases.
Keywords
ADCP; velocity-area method; velocity profile; velocity distribution; discharge;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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