A NEW MONITORING SYSTEM FOR RIVER DISCHARGE WITH AN H-ADCP MEASUREMENT AND RIVER-FLOW SIMULATION

Abstract

To realize an accurate and continuous monitoring for river discharge at low cost, a new monitoring system with an H-ADCP measurement and river-flow simulation is developed. The H-ADCP can measure velocity profile at a horizontal line. In the numerical simulation, the measured velocities are interpolated and extrapolated in a cross section with satisfying dynamic principles. The present computational method is therefore referred to as a dynamic interpolation and extrapolation (DIEX) method. To confirm the fundamental performance of the present monitoring system, the H-ADCP measurement was done at the middle reach of the Edo River and the river discharge was evaluated with the present method. The simulated velocity and discharge were compared with the results measured with an ADCP and a price current meter. The results indicate that the simulated velocity and discharge give good agreements with the observed data, demonstrating the fundamental validity of the present monitoring system for river discharge.