CONTINUOUS MONITORING OF RIVER VELOCITY IN EDO RIVER USING H-ADCP

Abstract

We have recently attempted to develop a new real-time monitoring system for river discharge with an H-ADCP (horizontal acoustic Doppler current profiler) measurement and numerical simulation. In the present paper, the field data for velocity measured with the H-ADCP in a main channel of the Edo River are introduced. The measuring accuracy of the H-ADCP is discussed with the comparison of river velocities obtained by the H-ADCP and the other measuring instrument like an ADCP. The observed result also indicates that the temporal and spatial variations of river velocity are dominant in a flood-flow condition, demonstrating the importance of measuring velocity profile at a horizontal line with the H-ADCP for evaluation of river discharge.