Pemodelan Dan Analisa Daerah Terdampak Tsunami Akibat Gempa Megathrust Di Pesisir Selatan Jawa Timur

Ernawati, Cristina Dwi (2021) Pemodelan Dan Analisa Daerah Terdampak Tsunami Akibat Gempa Megathrust Di Pesisir Selatan Jawa Timur. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Zona subduksi merupakan pertemuan antara dua lempeng atau biasa disebut dengan zona Megathrust, salah satunya berada di Selatan Pulau Jawa. Zona megathrust ini memiliki potensi kegempaan yang cukup besar. Seismic Gap yang ada di Selatan Jawa disinyalir dapat menghasilkan gempa besar. Kejadian gempa besar yang dapat memicu timbulnya tsunami. Penjalaran gelombang tsunami dapat dimodelkan dengan menggunakan initial condition gempa, dimana dalam penelitian ini digunakan data Slip Deficit Model Java (Sri Widiyantoro dkk) yang merupakan hasil dari pengolahan data pergerakan lempeng bumi berdasarkan pengukuran GPS. Dengan model ini diperoleh kekuatan gempa sebesar 8,46Mw. Untuk titik lokasi observasi ditentukan disetiap kabupaten yang ada di Pesisir Selatan Jawa yang meliputi Pacitan, Trenggalek, Tulungagung, Blitar, Malang, Lumajang, Jember dan Banyuwangi. Untuk penjalara gelombang tsunami pertama mencapai Blitar dengan waktu 36 menit dan penjalaran gelombang tertinggi di kabupaten Trenggalek dengan ketinggian mencapai 9,1949 meter. Tingkat bahaya tsunami di pesisir Watulimo didominasi oleh tingkat bahaya sangat rendah hingga sedang, dengan luasan tingkat bahaya sangat tinggi mencapai 637,93 Ha dengan persentase 7,35% ======================================================================================================== The subduction zone is a meeting between two plates or commonly called the Megathrust zone, one of which is located in the southern part of Java Island. This megathrust zone has a large enough seismic potential. The Seismic Gap in southern Java is thought to be capable of producing a large earthquake. A large earthquake that can trigger a tsunami. The propagation of tsunami waves can be modeled using the initial conditions of the earthquake, where in this study used the Java Slip Deficit Model data (Sri Widiyantoro et al) which is the result of processing data on the movement of the earth's plates based on GPS measurements. With this model, an earthquake strength of 8.46Mw was obtained. The point of observation is determined in each district on the South Coast of Java which includes Pacitan, Trenggalek, Tulungagung, Blitar, Malang, Lumajang, Jember and Banyuwangi. For the first tsunami wave propagation reached Blitar with 36 minutes and the highest wave propagation in Trenggalek with a height of 9.1949 meters. The tsunami hazard level on the Watulimo coast is dominated by a very low to medium hazard level, and the area of very high hazard level reached 637.93 Ha with a percentage up to 7.35%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Tsunami, Megathrust, Delflt3D, Delft Dashboard
Subjects: G Geography. Anthropology. Recreation > GA Mathematical geography. Cartography > GA139 Digital Elevation Model (computer program)
T Technology > T Technology (General) > T57.62 Simulation
T Technology > TC Hydraulic engineering. Ocean engineering > TC530 Flood control
Divisions: Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User: Cristina Dwi Ernawati
Date Deposited: 23 Aug 2021 01:04
Last Modified: 23 Aug 2021 01:04
URI: https://repository.its.ac.id/id/eprint/88539

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