Pemodelan Tsunami dan Pembuatan Peta Rendaman Untuk Keperluan Mitigasi di Teluk Teleng, Pacitan

Abstract

The Indian Ocean to the south of Java Island is the subduction fault which is the source of the earthquakes and tsunamis. Historically, there were two major earthquake tsunamis in Banyuwangi (1994) and Pangandaran (2006), both causing high number of casualties. It shows that the area of the sea to the south of Java is a potential earthquake and tsunami region. This study describes the simulation of tsunami in the area of Teluk Teleng, Pacitan, East Java.

Teluk Teleng is one of recreational areas visited by a lot of domestic and overseas tourists. The results of this study are aimed for the purpose of mitigation. Modelling scenarios are based on large historical earthquake and tsunami events, and also on the earthquake analysis by Well & Coppersmith (1994) and Papazachos et al (2004). Simulation was carried out using the hydrodynamic module of MIKE21 software package, subdividing the domain by means of nested grid. The maximum wave heights and the run up were obtained, as well as the maximum inundation of affected areas. The results will be used for the determination of tsunami risks in the area, and as considerations for mitigation purposes.