Abstract
In the present study, we examined the fundamental performance of a radio current meter (RCM) for velocity and discharge measurements. For this purpose, we conducted field measurements using RCM, ADCP and ADV (Acoustic Doppler Velocimeter) in the Edogawa River under low- and high-flow conditions. Laboratory experiments in an open channel with wind tunnel were performed to compare velocity and discharge measured by RCM, pitot tube and float. The results indicate that the velocity measured by the RCM was almost comparable to that by floats, showing that the measurement depth of the RCM corresponds to the draft of float (<5 mm). It is also found that the discharge using the RCM and standard coefficient of float (=0.85) were in good agreement with the experimental data.
