SPASIAL ANALYSIS OF VOLCANIC ASH DISTRIBUTION DUE TO VOLCANIC ERUPTION IN JAVA ISLAND

• Main Author: Hanif Resgi Putranto, Muhamad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/73450
• Institution: Institut Teknologi Bandung

Indonesia is one of the countries located in the Ring of Fire, which is the most geologically active region in the world. As a result, Indonesia is prone to earthquakes and volcanic eruptions. One of the islands that has the most active volcanoes in Indonesia is Java Island, along with the dangers of its eruption, one of which is volcanic ash. The presence of volcanic ash is very dangerous for health, agriculture, flight safety, and even building infrastructure. The existence of these potential hazards makes the existence of the volcano also a threat to the people on the island of Java. One of the mitigation efforts that can be done is to make a map of potential volcanic hazards, but what is currently available is only a map of lava hazards and areas prone to pyroclastic fall and flow, while for volcanic ash which has a wider impact has not been mapped in detail. This research aims to create a map of the Potential Distribution of Volcanic Ash due to Volcanic Eruptions in the future on the island of Java. In this research, the modeling method of volcanic ash distribution is carried out probabilistically following the PHA (Probabilistic Hazard Assessment) principle by using historical data of Java Island volcanoes, eruption strength, and wind speed around the volcano. Modeling was done using TephraProb software. The result of this modeling is a Volcanic Ash Distribution Map based on volcanic ash accumulation (kg/m2) and a hazard map classified into three classes. The results show that the distribution of volcanic ash is quite varied, both the area of distribution and the accumulation of ash based on differences in the strength of the eruption.