Abstract
Damage estimation for scenario earthquakes is extensively carried out by local governments in Japan for emergency response planning. However, local governments usually do not possess detailed grid data of lifeline systems with pipe material, diameter and length's information in the grid cell of GIS. The accuracy of lifeline’s mesh data is considered to be highly related to the accuracy of damage assessment results. Therefore, to improve the accuracy of earthquake damage assessment, a correlation analysis is carried out to estimate the sewer pipeline length within a grid cell of 250 m from the corresponding road network’s GIS data for Urayasu city, Chiba prefecture, Japan. The estimated sewer pipeline lengths were compared with the actual lengths from the GIS network data, and the efficiency of the estimation method from road network data is demonstrated.
