Studi Penentuan Jalur Aliran Lava Metode Steepest Slope Dari Data Dem Insar Dan Peta Rupa Bumi Indonesia (Studi Kasus: Gunung Semeru, Jawa Timur)

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.

[img]
Preview
Text
3511100043-Undergraduate Thesis.pdf - Published Version

Download (5MB) | Preview

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, vi kemudian pada akhirnya dominan mengalir ke arah selatan dan bermuara di Samudera Hindia. ======================================================================================================== 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 viii 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

Actions (login required)

View Item View Item