Spatial Analysis on Tsunami Predictions in Pandeglang Regency

Abstract

Pandeglang Regency is an area that has the potentiel to be hit by tsunamis. The plate subduction paths of Indo-Australia and Anak Krakatau Volcano make Pandeglang Regency a region with a high tsunami potential. One step that can be taken to overcome and minimize losses is to do spatial planning to protect it against potential tsunami damage. This research aimed to evaluate the spatial area of Pandeglang Regency based on the identification of potential tsunami hazards. The concept of modelling the tsunami inundation height developed by Berryman and based on Head Regulation No.4 of 2012 of the Indonesian National Board for Disaster Management has been used to identify potential tsunami hazards. The modelling was carried out by calculating the potential distribution of tsunami wave heights in coastal areas. Three scenarios were used to estimate the distribution. The results showed that the first scenario predicted a maximum tsunami height of 7.5 meters above sea level with the furthest tsunami inundation reaching 1,700.12 meters. Second scenario predicted maximum height of 15 meters, with the furthest tsunami inundation reaching 3,384.62 meters. Meanwhile, the last scenario was able to predict a height of 20 meters and showed the furthest tsunami inundation reaching 5.155,11 meters. These results proved that in all scenarios, the widest inundation would occur in Panimbang Regency. This is due to the relatively small variations in roughness and slope of the surface. The same condition also occurs in the last two scenarios, in which Sumur District was the area most ffected. Therefore, the spatial plan of Pandeglang Regency needs to be evaluated and the function of residential area changed to reduce and prevent large losses.

TSUNAMI HAZARD MAPPING BASED ON COASTAL SYSTEM ANALYSIS USING HIGH-RESOLUTION UNMANNED AERIAL VEHICLE (UAV) IMAGERY (Case Study in Kukup Coastal Area, Gunungkidul Regency, Indonesia)

“…The maximum tsunami height generated by the 8.9 Mw earthquake scenario is 16.5 meters on the Kukup Shoreline. The results of the tsunami inundation model in the coastal area are similar to previous studies conducted in the southern coastal areas of Java Island as high as 12-16 meters (Horspool et al, 2014); Cilacap, Central Java as high as 10-15 meters (Gayer, Leschka, Nöhren, Larsen, & Günther, 2010); Pandeglang, West Java as high as 15 meters (Lestari, Fitriasari, Ahmad, Rais, & Azhari, 2021); Blitar and Malang, East Java as high as 17.5 meters (Armono, Putra, & Wahyudi, 2021).…”

Study of tsunami source as preparation for tsunami modeling in Sulawesi

“…According to the Scaling Law by [20] the fault dimensions for an 8.5 Mw earthquake have a length (L) of 57.68 km and a width (W) of 108.4 km. Because of the significant initial momentum, tsunami waves experience varying heights, allowing them to propagate at specific 5 points on the Earth's surface and damage various human-made structures in the path of tsunami wave propagation [21].…”

Geospatial Information Analysis Based on Numerical Modelling of Tsunami Inundation in Coastal Area of Temon District, Kulon Progo Regency

“…Tsunami inundation is the maximum distance of water that can reach land as a result of the propagation of tsunami [12]. The initial magnitude of the earthquake's momentum causes the wave height to vary, making it possible for the wave to destroy what it passes through on land [13]. Tsunami inundation can potentially damage built-up land.…”