The threat of tsunami debris due to non-permanent buildings in Cilacap City

Abstract

Run-up tsunamis have the ability to pick up debris along their path. More severe damage may result from the debris and their force of impact. Therefore, it is important to analyse the potential for debris in a tsunami-prone area. This study examines the threat of tsunami debris in Cilacap City, especially the source of debris from temporary or non-permanent buildings along the coast of Cilacap City. A site assessment was conducted to observe the existence of non-permanent buildings along with their number and characteristic. The results of the study show that the infrastructure of Cilacap City faces a serious threat from tsunami debris which is source from non-permanent buildings. The material transported by the tsunami run-up to cause debris was maximum 465 tons found in area around Pasir Emas Street cause potential debris for one-meter perpendicular to tsunami run-up direction 503 kg and generate tsunami impact force 28,284.3 N. In addition, the fishing port, Pendem fort and Pertamina oil refinery are also potentially affected by tsunami debris because each location has a significant number of non-permanent buildings.