PROBABILISTIC SEISMIC AND TSUNAMI HAZARD ANALYSIS FOR DESIGN CRITERIA AND DISASTER MITIGATION IN REHABILITATION AND RECONSTRUCTION OF A COASTAL AREA IN CITY OF BANDA ACEH

摘要

A Rehabilitation and reconstruction process for coastal area of city of Banda Aceh post Great Sumatra (Mw = 9.3) earthquake requires both seismic and tsunami hazards design criteria. A case study to develop design criteria of a coastal sub-district site in the effort of disaster mitigation is presented. The case study consists of probabilistic seismic and tsunami hazard analysis. The potential of both subduction and shallow crustal faults is considered in the seismic hazard analysis, The subduction source zones are considered as a seismic source for the tsunami hazard analysis. Some site-classification analyses were conducted to estimate level of ground surface acceleration. The analyses were based on collection of shear wave velocity data from a set of geotechnical subsurface exploration and spectral analysis of surface wave survey. Likewise, tsunami inundation maps generated from probabilistic tsunami hazard analysis was also developed. The maps were developed through tsunami and run-up numerical modeling associated with its earthquake probabilities. Both the seismic and tsunami hazard criteria are recommended as a basis for design criteria as part of the disaster mitigation effort in the currently undergoing rehabilitation and reconstruction process, as well as for long-term development of the case-study site.