ARINTALOFA, Vithya and Yuliyanto, Gatot and Harmoko, Udi (2020) INTERPRETASI BAWAH PERMUKAAN LAPANGAN PANAS BUMI DIWAK DAN DEREKAN KABUPATEN SEMARANG MENGGUNAKAN METODE HVSR. Masters thesis, School of Postgraduate Studies.
Full text not available from this repository.Abstract
Penelitian ini dilaksanakan untuk menganalisis struktur bawah permukaan yang berada di lapangan manifestasi panasbumi Diwak dan Derekan dengan menggunakan metode Horizontal Vertical Spectre Ratio (HVSR). Data diperoleh dengan melakukan perekaman mikrotremor, yang menghasilkan nilai frekuensi dominan dan faktor amplifikasi untuk mendapatkan nilai kecepatan gelombang P (Vp) dan kecepatan gelombang S (Vs). Sebanyak 52 titik pengukuran dilakukan selama penelitian, adapun pengolahan data menggunakan perangkat lunak Geopsy dan Surfer 13.
Berdasarkan hasil pengolahan data mikrotremor dengan menggunakan metode HVSR diperoleh persebaran nilai frekuensi dominan di area penelitian berkisar antara 0.08 – 9.29 Hz dan sebaran nilai faktor amplifikasi nya yaitu antara 0.03 – 7.0, untuk sebaran nilai Vp antara 390 m/s hingga 4993 m/s dan untuk nilai Vs yaitu berkisar antara 190 m/s sampai dengan 3054 m/s, nilai Vp/Vs yaitu berkisar antara 1,63 sampai dengan 3,85 dan nilai poisson ratio berkisar antara 0,15 hingga 0,45.
Hasil interpretasi nilai kecepatan gelombang P dan gelombang S yang dimodelkan dalam bentuk 3 dimensi menggambarkan kondisi bawah permukaan area penelitian yang terdapat manifestasi panas bumi Diwak dan Derekan tersusun oleh beberapa lapisan jenis batuan, yaitu lapisan tanah penutup soil, sand, lapisan alluvium, lapisan berupa clay, lapisan sandstone and shale, dan lapisan yang berupa material limestone.
Kata kunci: Mikrotremor, manifestasi panas bumi, diwak derekan, HVSR, poisson ratio, Vp/Vs
This research aims carried out to analyze the subsurface structures located in the geothermal manifestation fields of Diwak and Derekan using the Horizontal Vertical Specter Ratio (HVSR) method. The data were obtained by recording microtremor, which resulted in the value of the dominant frequency and amplification factor to obtain the value of the P wave velocity (Vp) and the S wave velocity (Vs). A total of 52 measurement points was carried out during the study, while data processing used Geopsy and Surfer 13 software.
Based on the results of microtremor data processing using the HVSR method, the distribution of the dominant frequency values in the study area ranges from 0.08 - 9.29 Hz and the distribution of the amplification factor values is between 0.03 - 7.0, for the distribution of Vp values between 390 m / s to 4993 m/s and the Vs value, which is ranging from 190 m / s to 3054 m / s, the Vp / Vs value ranges from 1.63 to 3.85 and the Poisson ratio value ranges from 0.15 to 0.45.
The results of the interpretation of the velocity values of the P wave and the S wave which are in 3-dimensional model form illustrate the subsurface conditions of the research area where there are manifestations of geothermal energy. Its subsurface layers show of the sandstone and shale, and layers of limestone material.
Keywords: Mikrotremor, geothermal manifestation, diwak derekan, HVSR, poisson ratio, Vp/Vs
Item Type: | Thesis (Masters) |
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Uncontrolled Keywords: | Mikrotremor, manifestasi panas bumi, diwak derekan, HVSR, poisson ratio, Vp/Vs |
Subjects: | Engineering > Chemical Engineering |
Divisions: | Postgraduate Program > Master Program in Energy |
Depositing User: | Users 183 not found. |
Date Deposited: | 25 Apr 2022 04:11 |
Last Modified: | 25 Apr 2022 04:11 |
URI: | https://eprints2.undip.ac.id/id/eprint/5935 |
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