EMPLOYMENT PARTICLE FILTER TO QUASI 2D HYDRAULIC COMPUTATION TO RIVER CHANNEL NETWORK

Abstract

 In this study, we developed a hydraulic analysis method using particle filters in order to improve the estimation accuracy of the hydraulic phenomena of a river channel network. This method enabled us to estimate the time-space fluctuation of conveyance and the time-space distribution of the water level and discharge using the observation information. First, we verified the validity of the method by twin experiments and considered the differences in observation information which are used in particle filter. Next, we verified the efficacy of our developed analysis method by applying flood flow in the lower basin of the Shinano river channel network.