Tsunami Hazard Map in PARANGTRITIS - Bantul Regency - Yogyakarta Special Province

The tsunami that hit Java on 17 July 2006 was not a small event. Initial wave height estimates were between 2 m and 3 m, but it turned out that waves were more than 7m high in some areas and traveled several hundred meters inland. The Tsunami destroyed scores of houses, restaurants and hotels. Cars, motorbikes and boats were left mangled amid fishing nets, furniture and other debris.

The research has three results, first 18 % area was destroyed in last tsunami on 2006, second close relationship of the coastal morphology and tsunami impact shown that low land area has highly destructed caused by tsunami because it was crushed on the first place. This research also proves that sand dunes have important role as natural barrier that act as water breaker. Third, 8 building clusters were classified with different building characteristics and slope condition. It is concluded from the calculation that 75 % of total area are classified into highly vulnerable, 10% are medium vulnerable and 15% low vulnerable due to tsunami disaster.


The local newspaper reported that the damage building hit by tsunami in Parangtritis coastal area generally are rattan building (wooden), used for a small shops sells food and souvenirs, non permanent. The rattan building is a flexible material, which is very strong in tension, compared to steel. It is a very cheap material.

An emergency evacuation place on the way to a hill top is effective for saving lives. The height of the place should be higher than the expected tsunami. In case of tsunami at midnight, it will be much more dangerous for the villagers to evacuate, because of the complete darkness without electricity, so indications to let them know the evacuation route should be considered. For successful evacuation, therefore higher evacuation places than the expected tsunami should be set in and/or near residential areas. There are two alternative paths disaster evacuation for this area, evacuation path to the Yogyakarta city and evacuation path to the mountain area on the east side of area which is the more SAVE ZONE from the tsunami disaster.


By: Ratih Fitria Putri (Double Degree Master Programe MPPDAS UGM - Chiba University Japan)