Abstract
When a large earthquake as large as M7 strikes, concerns arise regarding multiple damages simultaneously occurring on the water pipeline network. However, impact on the entire network system depends on the location of damaged pipes, pipeline network configurations and distribution of water demands among many other factors.
Therefore, in this research, we proposed a new evaluation index that considers factors such as the shape and regional characteristics of the water distribution network. Additionally, we conducted studies on the method for evaluating renewal priorities considering the impact due to a lot of broken pipes. Damage predictions on water pipes in a Northern Tokyo-bay Earthquake is simulated according to the Monte Carlo method to analyze such factors as the volume of water outage and important facilities impacted by the water outage. The target water distribution zone was divided into 13 blocks and compared to find the relationship between the pipeline network system configuration, the distribution of water demand, and unserviceability. As a result of this comparison, this study proposes two new evaluation indices collectively called Earthquake Disaster Risk Indicators.
Furthermore, utilization of these new evaluation indices in the water pipeline system renovation scenario analysis demonstrates that it is possible to study and plan a more effective water pipeline system renovation plan.
