Tsunami Risk Map-a Case Sstudy of Gongliao District

摘要

A great tsunami had stroke the northern coast of Taiwan in 1867. Thestudy area is focused on Gongliao District, New Taipei City. Theassumed earthquake scenario originated from Yap Trench is used forCornell University tsunami model (COMCOT model) which simulatesthe wave height and wave speed of the tsunami triggered by theearthquake. The wave heights of the northern coast of Taiwan are thenused as boundary conditions for overland flow simulation. Risk due totsunami is defined as hazard multiplying by vulnerability. Themaximum water depth, the maximum water speed due to tsunami andrising rate of water surface level are used for production of tsunamihazard map. As for vulnerability, population and habitat environmentare taken into account. After evaluating hazard and vulnerability, thehigh tsunami risk area can be delineated, and can take suitablemeasures to reduce loss of life and properties.