Author(s): Yasuo Nihei; Akira Kimizu
Linked Author(s):
Keywords: Discharge; H-ADCP; Data assimilation; Real-time monitoring; River flow
Abstract: To realize accurate and continuous monitoring for river discharge at a low cost, a new monitoring system with H-ADCP (horizontal acoustic Doppler current profiler) measurement and river-flow simulation has been developed. The H-ADCP can measure the velocity profile at a horizontal line. In the numerical simulation, the measured velocities are interpolated and extrapolated in a cross section with a proper physical background. The proposed computational method is therefore referred to as the dynamic interpolation and extrapolation (DIEX) method. To confirm the fundamental performance of the new monitoring system, the H-ADCP measurement was made at the middle reach of the Edo River in Japan and the river discharge was evaluated with this method. The simulated discharge was compared with the results measured with an ADCP and a Price current meter. The results indicate that the simulated discharge shows good agreement with the observed data, demonstrating the fundamental performance of this monitoring system for river discharge.
Year: 2007