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Journal : International Journal for Disaster and Development Interface

The Analysis of Tsunami Hazard and Determination of Evacuation Routes Based on GIS in Coastal Areas (Case Study: Pacitan District, Pacitan Regency) Huda, Muhammad Badrul; Jumadi, Jumadi; Ibrahim, Mohd Hairy
International Journal for Disaster and Development Interface Vol. 3 No. 2 (2023): October 2023
Publisher : Amcolabora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53824/ijddi.v3i2.53

Abstract

The south of Java is a vulnerable to tsunami disasters. Pacitan District is a coastal area in the south of Java, which is directly adjacent to the Indian Ocean. Its location, which is directly adjacent to the Indian Ocean, is one of the areas that is prone to tsunami disasters. The purpose of this study were to analyze the spatial distribution of the tsunami hazard in the Pacitan District Coastal area under the 8.0 Mw earthquake scenario and to model the optimal evacuation route for handling the tsunami disaster in Pacitan District. Tsunami wave modeling uses Delft3D-Flow software, which is based on the Shallow Water Equations and Hloss calculations to determine the inundation area. Using GIS with the Least-Cost Path method to determine the optimal path for tsunami evacuation. The results showed that the tsunami wave height on the coastline was 5 meters high. A total area of 571.79 hectares of tsunami-affected area. The inundation area for each affected area is 239.70 ha in Sidoharjo Village, 190.87 ha in Ploso Village, and 141.22 ha in Kembang Village. Determination of evacuation routes obtained five evacuation routes. The travel time for the evacuation process with walking takes more than 30 minutes, whereas using a motorized vehicle is less than 10 minutes.
Analysis of Landslide Vulnerability Levels and Disaster Mitigation Based on Geographic Information Systems GIS in Prambanan District, Sleman Regency Dewi, Hapsari Kusuma; Sigit, Agus Anggoro; Fikriyah, Vidya; Ibrahim, Mohd Hairy
International Journal for Disaster and Development Interface Vol. 5 No. 1 (2025): April 2025
Publisher : Amcolabora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53824/ijddi.v5i1.31

Abstract

Prambanan District is one of the sub-districts in Sleman Regency that is prone to landslide threats, one of which is due to the topography in Prambanan District which has a steep slope of 18.53%. According to a statement from the Disaster Risk Reduction Forum (FPRB) in Prambanan District, there are 5 villages that are prone to landslides and based on the latest data from the Regional Disaster Management Agency (BPBD) in 2021 there were 16 incidents. This study utilizes the application of Geographic Information Systems for vulnerability analysis using 5 parameters: slope, soil type, geological type, rainfall and land use. This study aims to 1) analyze the distribution of landslide susceptibility levels in Prambanan District, Sleman Regency, 2) analyze the dominant factors that cause landslide vulnerability in Prambanan District, Sleman Regency, 3) analyze what mitigation efforts can be done to minimize losses due to disasters. Landslide in Prambanan District, Sleman Regency. The method used in this research is the survey method using the unit of analysis of land units. The sampling method in this study used stratified random sampling based on the strata, land units that were adjusted to the level of landslide susceptibility. The data analysis methods used are tiered overlay analysis, frequency table analysis, landslide hazard map analysis and field surveys. The results of this study indicate that the level of vulnerability to landslides in Prambanan District is dominated by moderate vulnerability. Moderate vulnerability covers 17 land units, is a S5-IL-STH, S5-III-L-STH, S5-VLT, S5-II-LT, S5-II-L-STH, S5-IV-LP, S5-IV-LK , S5-IV-L-STH, V8-I-RCK-SI, F1-I-RCK-SI, F1-I-GK-SI, F1-II-RCK-SI, F1-II-L-SI, F1 -ILT, F1-IL-SI, S2-II-LT, S2-III-LT. The dominant factors causing landslide susceptibility in Prambanan District are bulk and soil type. Disaster mitigation efforts in Prambanan District based on the results of analysis and field surveys are divided into 2 forms, structural mitigation and non-structural mitigation.