Real-time city gas network damage estimation system – SIGNAL
Yoshihisa Shimizu1, K. Takahashi
1Centre for Disaster Management & Supply Control, Tokyo Gas Co. Ltd., 4th Floor, 1-5-20 Kaigan, Minato-ku, Tokyo, Japan.
: +81-3-5400-7620, Fax: +81-3-3433-8918,
One of SIGNAL’s functions is quick monitoring of seismic intensity (SI) meter readings and seismic peak ground acceleration at 331 locations, acceleration waves (time series) at 5 locations and rising ground water levels at 20 locations, which are considered most at risk from ground liquefaction. For data transmission a reliable radio-link network is used. This real-time earthquake data is linked to the GIS’s (Geographical Information System) databases of gas pipelines and ground conditions to give an accurate damage estimation, based on experiences with pipe damage suffered in previous earthquakes. The real-time estimation of damage to the gas network is useful for the rapid implementation of emergency work and in drawing up efficient and accurate restoration plans.