5:15 PM - 6:45 PM
[HTT15-P05] Impacts of Earthquakes on Population Dynamics in Chiayi, Taiwan: A GIS Approach
★Invited Papers
Keywords:GIS, TERIA, Staggered-Grid Finite Differences, Cellphone demographic
Based on the estimation of the Taiwan Earthquake Model (TEM), the seismic potential in Chiayi, Taiwan within the next 50 years is relatively high. Therefore, conducting seismic hazard simulations to analyze population dynamics caused by earthquakes becomes imperative for both governmental authorities and the public. The Taiwan Earthquake impact Research and Information Application (TERIA) platform, developed by the National Science and Technology Center for Disaster Reduction (NCDR) of Taiwan, is able to incorporate various data across agencies allowing governmental officials to study earthquake impacts in specified locations and magnitude. However, such platform is limited to the authorized agencies and is with simplified options for specifying an earthquake source. In order to mitigate the problem, in this study, we simulated the strong ground motion of an earthquake so the parameters such as PGA, PGV, and PGD and their distribution are generated using the Staggered-Grid Finite Differences (SGFD) method with the specified fault parameters including strike, dip, rake, seismic moment (M0), and subsurface velocity structure models. Earthquake-impacted population was then estimated with a GIS-based approach with the population demographic provided by the TERIA platform. In addition to the general population demographic, the disadvantaged groups such as the youth and the elderly in the population are also considered. This study provides a feasible procedure to study earthquake-impacted population to the public without being limited by the platform. The result if helpful and can be used as independent benchmarking for TERIA.