An Examination of Integration System for Parameter Calibration of Inundation Simulator Using Records

Yusuke Hida, and Hiroshi Chiba

Fujitsu Laboratories Ltd., Kawasaki, Japan

Abstract: The number of downpours of short duration has increased year on year across the world. Computerized hazard mapping is the most popular method in Japan for measuring such downpours. Since a numerical simulation of inundation is usually used for creating such maps, accuracy is essential to achieve a reduction in flood damage. The improvement of accuracy is, however, difficult because most numerical simulation analysis models include uncertainty factors as construction input data. This paper proposes automatic calibration of inundation simulation models using the water levels recorded by real-time sewer water level monitoring systems using ICT, in the Fujitsu Laboratories. The results of numerical experiments clearly showed that the accuracy of inundation simulation can be improved by parameter calibration. The scenario following a reverse in a river’s water levels was not however calculated with high accuracy since the river model is not included. This is our work for the future.

Key words: water-level monitoring system, parameter calibration, inundation simulation, sewer overflows, flood countermeasure