Tsunami hazard mapping and loss estimation using geographic information system in Drini Beach, Gunungkidul Coastal Area, Yogyakarta, Indonesia

Abstract

The southern coastal area of Java Island is one of the nine seismic gaps that prone to tsunamis. The entire coastline in one of the regencies, Gunungkidul, is exposed to the subduction zone in the Indian Ocean. Also, the growing tourism industries in the regency increase its vulnerability, which places most of its areas at high risk of tsunamis. This conditions are expected to increase the tsunami risk and loss potential alongside the coastal area. This research aims to model tsunami inundation and estimate the loss that caused by tsunami. Detailed DEM generated from UAV photogrammetry. Based on the model, several inundation scenario. Based on the model, the 4-m inundation did not affect a wide area. The modelling proves that the extent of tsunami-inundated areas is directly proportional to the wave height of tsunamis. The inundated area extend as the inundation scenario increase. Hilly karst topography prevent the water to inundate wider areas. The loss calculation shows that the material loss at the trading centre was relatively much higher than the other land uses because its included not only the value of the building but also the commodities and the strategic importance of their market.

Tsunami Vulnerability and Risk Assessment of Banda Aceh City through ArcGIS Software

“…Risk is the probability of harmful consequences, or expected losses (deaths, injuries, property, livelihoods, economic activity disrupted or environment damaged) resulting from interactions between natural or human-induced hazards and vulnerable conditions [3][4][5][6][7][8]. Risk = Hazard Potential (H) x Vulnerability (V) [12].…”

“…Indonesia lies between two oceans (the Pacific and Indian Oceans) and two continents (Australia and Asia). Situated in the meeting point of three highly active tectonic plates (Eurasian, India-Australia and Pacific plates),this archipelagic country is prone to earthquakes and tsunamis [8].…”

Planning tsunami vertical evacuation routes using high-resolution UAV digital elevation model: case study in Drini Coastal Area, Java, Indonesia

“…The coastal area of Gunungkidul is located on the southern coast of Java. Intensive tourism activities in this regency contribute to increased tsunami vulnerability, and the growing number of tourists has raised the vulnerability level, as more people are exposed to tsunami risk (Marfai et al 2019 ). With this increased exposure, evacuation planning must be carefully designed.…”

Identification of Rip Current Hazards Using Fluorescent Dye And Unmanned Aerial Vehicle (A Case Study Of Drini Beach, Gunungkidul, Indonesia)

“…The subduction zone in the south makes some locations susceptible to various destructive tectonic and volcanic activities (Marfai et al, 2008). Tsunamis are among the biggest threats to the island's south coast (Marfai et al, 2019b), but based on the number of cases, marine accidents occur more frequently. In Gunungkidul, marine accidents have been recorded to cause fatalities every year.…”