UNCERTAINTY ANALYSIS ON RIVER DISCHARGE EVALUATED BY H-ADCP MEASUREMENT AND DIEX METHOD

Abstract

This study aims to present the uncertainty analysis of river discharge evaluated by H-ADCP measurement and dynamic interpolation and extrapolation (DIEX) method, which has been developed to evaluate cross-sectional velocity from measured line-velocities. We gave artificial errors for measured velocity and setting conditions in the DIEX method when evaluating river discharge. Monitoring data for discharge at Naka River was used for the uncertainty analysis. The results indicate that measuring errors of velocity and setting conditions of the DIEX method did not influence significantly on discharge evaluation due to numerical algorithm of the DIEX method. This means the robustness and applicability of the present monitoring system to evaluate river discharge.