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All Journal Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Journal of Earth and Marine Technology (JEMT) Indonesian Journal of Environment and Disaster
Prastistho, Bambang
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science Physics Transportation

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Interaksi; Morfotektonik; Sag-Pond; Sesar Aktif Sutiono, Agus; Prastistho, Bambang; C. Prasetyadi, C. Prasetyadi; Supartoyo, Supartoyo
Prosiding Seminar Teknologi Kebumian dan Kelautan Vol 2, No 1 (2020)
Publisher : Prosiding Seminar Teknologi Kebumian dan Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2426.17 KB)

Abstract

Tegangan deformasi regional di daerah penelitian berasal dari gaya subduksi yang dikeluarkan di Selatan Pulau Jawa yakni di lokasi Palung Jawa. Berdasarkan data pengukuran di lapangan, tegangan regional maksimum (?1) disimpulkan merambat di sepanjang azimuth berarah Utara – Selatan (U-S) berkisar dari N355ºE hingga N10ºE. Tekanan regional ini membentuk fraktur regangan yang menonjol pada generasi pertama, yang ditunjukkan oleh karakteristik rekahan U-S; Sesar Girijati (GF), Sesar Sumbermulyo Parangtritis (SPF) dan Kalitirto - Gn.Bangkel - Jombor (KBJ). Rekahan rekehan tersebut berorientasi riedel tension cenderung memiliki karakter sesar aktif. Penting melakukan identifikasi jaringan sesar aktif tersebut untuk diijadikan acuan sebagai petunjuk praktis oleh pemerintah daerah, dalam melaksanakan amanat undang undang nomor 24 dan 27 tahun 2007 tentang Penanggulangan Bencana dan tentang Penataan Ruang. Oleh karena itu, makalah ini mengurai sebagian dari jaringan sesar aktif di Yogyakarta dengan melihat indikator antara dimensi Meander Kalitirto di Berbah dan interaksi jaringan pada setiap interkoneksi sesar penentu bentuk geometri meander tersebut. Liniamen Berbah memperlihatkan dua tren sepanjang arah azimuth N 30ºE dan N 180ºE yang menunjukkan orientasi menyimpang dari U-S ke TL-BD. Pembentukan sag-pond dari sebuah fitur morfotektonik yang ditunjukkan oleh laterally confine meander Sungai Opak di Kalitirto selebar 900 m, membentuk dua meander dengan dimensi 571 m lebar dan 723 m panjang (Meander Kalitirto di Utara) dan 216 m lebar dan 399 m panjangnya (Meander Kalitirto di Selatan). Meskipun, keberadaan meander di sepanjang Sungai Opak itu umum dijumpai, tetapi untuk meander yang ditemukan di Desa Kalitirto dan Jogotirto secara morfotektonik memiliki fisik dan dimensi yang unik. Meander ini mengekspresikan ukuran dan bentuk yang aneh, yang secara dramatis memiliki demensi lebar lebih besar dan berbeda dibandingkan perkembangan meander lainnya di sepanjang Sungai Opak. Hal ini disebabkan oleh fraktur regangan membentuk sag-pond ketika cekungan berkembang di dalam zona sesar. Susunan interaksi sesar di SagPond Berbah melibatkan perluasan Sesar Kalitirto - Gn Bangkel Jombor (KBJ) yang berorientasi Utara-Selatan bersama dengan sesar generasi kedua yakni sesar mendatar TL-BD. Karakteristik interaksi dua sesar ini dalam orientasi yang berbeda dari perpindahan pasangan set sesar sintetis dan set sesar antitetis ekstensional bertanggung jawab untuk membentuk tegangan sag-pond tersebut.
Reanalysis LUSI Stratigraphic Based on Cutting of Banjarpanji#1 Well Wibowo, Handoko Teguh; Prastistho, Bambang; Prasetyadi, C; Yudiantoro, Dwi Fitri
Journal of Earth and Marine Technology (JEMT) Vol 3, No 1 (2022)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2022.v3i1.3602

Abstract

The subsurface configuration or stratigraphy of the Sidoarjo Hot Mudflow (Lumpur Sidoarjo/LUSI) is used to see what formations are transported out and how the material properties can be known from the well log data of Banjarpanji#1 or BJP#1 well. There is something unusual about the BJP#1 log, namely the presence of solid volcanic sandstone at a depth of 6000-9297 ft where drilling ended. This abnormality was investigated by reanalyzing volcanic sandstone by reading the well log data which is drilling data during the exploration of the Banjarpanji-1 well by PT. Lapindo Brantas, Inc. which consists of rock logs as a result of predictions (prognosis) and facts found (actual) were then compared with the interpretation of the results of the investigation team with BP MIGAS 2006 which was then confirmed by petrographic and paleontological analysis. The unusual occurrence is the LUSI stratigraphic arrangement changes based on findings in volcanic sandstone sequences that were once considered part of the Kalibeng Formation of Plio-Pliestocene age, then changed to solid volcanic sandstone units of Middle Miocene age with a depositional environment in the outer neritic-upper bathyal.
MODEL KESIAPSIAGAAN KELUARGA TERHADAP ANCAMAN BAHAYA BENCANA GEMPA BUMI DESA CONDONGCATUR, KAPANEWON DEPOK, KABUPATEN SLEMAN, D.I. YOGYAKARTA Puspitasari, Lisa; Prastistho, Bambang; Prasetya, Johan Danu
Indonesian Journal of Environment and Disaster Vol. 2 No. 1 (2023): Indonesian Journal of Environment and Disaster
Publisher : Disaster Research Center, Universitas Sebelas Maret, Surakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijed.v2i1.479

Abstract

This study aims to find out the model of family preparedness, describe infrastructure facilities foe earthquake threat and assess factors that are the level of preparedness of the people of Condongcatur village against the threat of earthquake disasters. The study used quantitative methods, as well as sampling using purposive sampling techniques with family preparedness scale measurement tools, factors that affect family preparedness levels and observation sheets of facilities and infrastructure. The study subjects were people living in the village of Condongcatur and their analytical techniques using multiple regression analysis and using the help of the SPSS 23.00 for windowa computer program. The results of multiple regression analysis obtained knowledge variables about earthquakes with a calculated value 4,295, variable emergency response plan value tcalculate 2,416, variabel disaster warning system value tcalculated 3,065 and variable of resource mobility value tcalculated 7,280 with significance value 0,000 < 0,05 which means it can be concuded that preparedness in the village of Condongcatur against the threat of earthquakes in the category of ready and factores that affect preparedness in the village of Condongcatur against the threat of earthquake disaster in the category of very ready, as well as observation of facilities and infrastructure for the threat of earthquake disaster in the village of Condongcatur in the high category. Advice for researchers is expected to develop supporting factors that affect family preparedness in the village of Condongcatur against the threat of earthquake hazards.
Co-Authors Agus Sutiono C. Prasetyadi, C. Prasetyadi Dwi Fitri Yudiantoro Prasetya, Johan Danu Prasetyadi, C Puspitasari, Lisa Supartoyo Supartoyo, Supartoyo Wibowo, Handoko Teguh