REAL-TIME MONITORING METHOD FOR DISCHARGE AND WATER LEVEL IN A SEWER PIPE USING DIEX MODEL

It is necessary to monitor and forecast an inland flood to prevent a city from it. A primary issue of the monitoring for the inland flood is how to calculate discharge and water-level distribution. The authors have developed the dynamic interpolation and extrapolation (DIEX) method which interpolate and extrapolate velocity in a cross-section, and DIEX method for flood prediction (DIEX-Flood) which interpolate and extrapolate water-level data into a streamwise direction with satisfying hydraulic principles. In this study, DIEX and DIEX-Flood models were improved to be applicable to a pipe flow. In order to verify the fundamental performance of the present method, laboratory experiments and numerical simulations were conducted. The results indicate that DIEX method can evaluate smooth cross-sectional velocity and discharge with high accuracy. DIEX-Flood evaluates streamwise distribution of water-level with high accuracy throughout the calculation area.