REKONSTRUKSI BAWAH PERMUKAAN CANDI BELAHAN MENGGUNAKAN METODE VERY LOW FREQUENCY ELECTROMAGNETIC (VLF-EM)

FIKRI, RIJALUL (2017) REKONSTRUKSI BAWAH PERMUKAAN CANDI BELAHAN MENGGUNAKAN METODE VERY LOW FREQUENCY ELECTROMAGNETIC (VLF-EM). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kompleks candi Belahan merupakan kompleks purbakala terbesar di kaki gunung Penanggungan. Kompleks ini terdiri atas 2 bangunan candi utama yaitu candi Gapuro A dan Gapuro B. Sebagian besar dari peninggalan ini diduga masih ada yang tertimbun di dalam tanah, sehingga perlu dilakukan rekonstruksi bawah permukaan kompleks tersebut. Rekonstruksi bawah permukaan ini dilakukan dengan menggunakan metode Very Low Frequency (VLF-EM), yang memanfaatkan penjalaran gelombang radio militer berfrekuensi rendah. Perbedaan respon gelombang terhadap benda konduktif mampu menggambarkan kondisi bawah permukaan. Pengambilan data dilakukan pada setiap candi sebanyak masing-masing 5 lintasan. Metode VLF-EM ini merupakan metode Geofisika pasif yang sangat mudah terkontaminasi oleh noise, untuk menghilangkan noise tersebut dilakukan filtering dengan menggunakan NA-MEMD (Noise-Assited Multi Emperical Mode Decomposition). Interpretasi hasil menggunakan analisa kualitatif (filter Fraser dan Karous-Hjelt) dan analisa kuantitatif (inversi) dengan software INV2DVLF. Anomali dengan resistivitas 180 Ωm – 320 Ωm pada kedalaman 5 m diduga sebagai batuan candi. =========================================================================================== Belahan Temple Complex is the biggest archeological site in the slope of Mount Penanggungan. The complex consists of two main temples, i.e. Gapuro A and Gapuro B. Most of temple constructions are believed still buried underground, hence virtual subsurface reconstruction of the complex is necessary. The subsurface reconstruction uses Very Low Frequency (VLF-EM) method, employing propagation of low frequency military radio wave. Variety of wave respons as reflected by subsurface conductive materials describes subsurface conditions. Data are collected from both temples with 5 lines on each temple. VLF-EM method is a passive geophysics method easily contaminated by noise. To reduce noise, filtering is employed using NA-MEMD (Noise-Assisted Multi Empirical Mode Decomposition). Result interpretation employs qualitative analysis (Fraser filter and Karous –Hjelt) and quantitative analysis (inversion) aided by INV2DVLF Software. An anomaly with 180 Ωm – 320 Ωm resistivity located in the depth of 5 m from surface is suspected to be part of temple stone construction.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Kompleks Belahan,VLF-EM, NA-MEMD, Fraser dan Karous-Hjelt,Belahan Complex
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7872 Electromagnetic Devices
Divisions: Faculty of Mathematics and Science > Physics > (S1) Undergraduate Theses
Depositing User: RIJALUL FI RIJALUL I FIKRI
Date Deposited: 26 Jan 2017 01:16
Last Modified: 26 Jan 2017 01:16
URI: http://repository.its.ac.id/id/eprint/3221

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