Morphometric Characteristic and Distribution of Hummocky Hills in Debris Avalanche Deposit of Galunggung Volcano, West Java, Indonesia
Penulis/Author
ALFIN AZKA SYAUQI (1); Dr. Ir. Haryo Edi Wibowo, S.T., M.Sc. (2); Dr. Ir. Agung Harijoko, S.T., M.Eng., IPM. (3)
Tanggal/Date
1 2022
Kata Kunci/Keyword
Abstrak/Abstract
Sector collapse of a volcanic body produces topography of horseshoe-shaped caldera incisions and a widespread hummocky hill resembling debris avalanche deposit. The study of morphometry, distribution, and the alignment of the hummocky hills is necessary to understand the source and deposition process of the debris-avalanche deposit. Galunggung volcano is, one of the volcanoes in Java Island, attributed with 7 km wide of caldera opens towards the east direction (N 135° E) where hummocky hills cover an area of ~32 km2. Morphometry of the hummocky hills is 500-700,000 m2 in size, elongation ratio of 1.3-3.9. Hummocky hills are distributed 0.5 to 20 km distance from the summit of the Galunggung volcano. The elongation orientation of the hummocky hills is deviated from the main flow direction forming various angles. We divided the deviation angle into parallel (0-45°) and perpendicular orientation (45-90°). The maximum size of the hummocky hills generally decreases towards increasing distance from the summit. These hills also have an alignment that changes from perpendicular to parallel. This pattern is a typical free flow pattern of debris-avalanche deposits.
Artikel dan Sertifikat/Bukti Kehadiran/Pasport (jika tidak ada sertifikat)
3
TURNITIN- Morphometric Characteristic and Distribution of Hummocky Hills in Debris Avalanche Deposit of Galunggung Volcano, West Java, Indonesia (1).pdf
