Arianto, Brian Bagus (2015) Studi Penentuan Jalur Aliran Lava Metode Steepest Slope Dari Data Dem Insar Dan Peta Rupa Bumi Indonesia (Studi Kasus: Gunung Semeru, Jawa Timur). Undergraduate thesis, Institut Teknology Sepuluh Nopember.
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Abstract
Letusan gunung berapi merupakan salah satu fenomena alam
yang disebabkan oleh parameter geofisik dan geomorfologi. Gunung
Semeru di Kabupaten Lumajang, Jawa Timur merupakan erupsi
gunung api tipe vulkanian dan strombolian yang berarti merupakan
ancaman tinggi bagi masyarakat sekitar. Letusan gunung api
menghasilkan aliran hidrologi berupa lahar dan lava serta awan
panas dan abu vulkanik.
Data yang digunakan untuk penentuan aliran lahar dan lava
tersebut adalah data DEM InSAR dan data DEM dari kontur Peta
Rupa Bumi Indonesia. Data ketinggian DEM bisa digunakan untuk
membantu memodelkan penentuan aliran tersebut. Pemodelan aliran
yang dihasilkan tersebut menyerupai model aliran sebenarnya di
lapangan sehingga bisa digunakan untuk pemantauan dan mitigasi
bencana akibat letusan gunung api. Teknik penentuan aliran lahar
dan lava pada penelitian ini menggunakan metode steepest slope
berdasarkan teori aliran hidrologi.
Dari pemodelan arah aliran, dihasilkan persentase arah
aliran yang memiliki nilai besar adalah aliran arah timur hingga
barat. Kemudian dapat disimpulkan bahwa arah aliran yang berhulu
dari puncak gunung Semeru adalah dominan menuju ke arah timur,
tenggara, selatan, barat daya, dan barat. Aliran tersebut melewati
sungai di beberapa kecamatan di kabupaten Malang dan Lumajang,
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kemudian pada akhirnya dominan mengalir ke arah selatan dan
bermuara di Samudera Hindia.
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Volcanic eruption is one of the natural phenomenon which
caused by geophysics and geomorphology parameters. Mount
Semeru, located in Lumajang, East Java, is volcanian and
strombolian type of volcano eruption which is a high threat to the
nearby society. Volcanic eruptions produce hydrology flow (volcanic
mudflow and lava), hot cloud and volcanic ash.
The data which is used to determine the lahar and lava flow
is InSAR DEM and DEM data from RBI map contours. DEM data
can help to model the determination of the flow. The produced model
flow represent the actual flow in reality, so it can be used to monitor
and mitigation disasters that caused by volcanic eruptions.
Determination technique of lahar and lava flows in this study use the
steepest slope method based on hydrological flow theory.
Based on model flow direction, it generates flow direction
percentage which results have a high value on the east to the west
flow. It can be concluded that the flow direction that comes from the
top of Gunung Semeru is dominant to the east, southeast, south,
south-west and west. The flow passes through river several region in
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Malang and Lumajang, then finally the flow to the south and end in
the Indian Ocean.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSG 624.183 41 Ari s |
| Uncontrolled Keywords: | Lahar and Lava Flows, Steepest Slope, DEM |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA683 Precast concrete construction. Prestressed concrete construction. |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Geomatics Engineering > 29202-(S1) Undergraduate Theses |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 31 Oct 2019 01:59 |
| Last Modified: | 31 Oct 2019 01:59 |
| URI: | http://repository.its.ac.id/id/eprint/71523 |
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