Kurniawan, Muhammad Lutfillah (2021) Identifikasi Persebaran Situs Petirtaan Sumberbeji Dengan Metode Magnetik. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Balai Pelestarian Cagar Budaya (2019) menemukan struktur bata kuno pada daerah Sumberbeji yang berbentuk seperti saluran air dengan panjang 14 meter, lebar 1.5 meter, dan kedalaman 2 meter yang membentang arah barat-timur. Pemetaan kondisi bawah permukaan menjadi suatu hal yang sangat penting untuk memetakan persebaran struktur bata tersebut sebelum dilakukan proses ekskavasi. Metode magnetik merupakan metode geofisika pasif dan non- destructive yang dapat digunakan untuk memetakan struktur bawah permukaan dengan melihat kontras magnetik suatu benda dengan lingkungan sekitarnya. Pengukuran magnetik dilakukan sebanyak 114 titik dengan jarak antar titik 5 meter. Nilai intensitas medan magnet hasil pengukuran selanjutnya dilakukan koreksi harian dan koreksi IGRF untuk mendapatkan anomali total. Penelitian ini juga menggunakan Filter Second Vertical Derivative (SVD) untuk mendapatkan anomali residual yang berguna untuk mempertegas adanya batas anomali. Hasilnya didapatkan intensitas magnetik pada peta anomali residual dengan range -8.56 nT hingga 3.23 nT. Adanya anomali tinggi dengan nilai 1.47 nT hingga 3.23 nT yang berada di sekitar singkapan di indikasikan sebaran situs sumberbeji yang terpendam. Kemudian pemodelan 3D dilakukan untuk mendapatkan distribusi sebaran suseptibilitas. Hasilnya menunjukkan nilai suseptibilitas 0.0002 hingga 0.0053 SI diinterpretasikan sebagai sebaran situs yang terpendam.
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Cultural Heritage Conservation Center (2019) found an ancient brick structure in Sumberbeji area that is shaped like a waterway with a length of 14 meters, a width of 1.5 meters, and a depth of 2 meters that stretches west-east. Mapping the sub-surface condition becomes a very important thing to map the distribution of brick structures before the excavation process. Magnetic method is a passive and non-destructive geophysical method that can be used to map the sub-surface structure by looking at the magnetic contrast of an object with the surrounding environment. Magnetic measurement is carried out as many as 114 points with a distance between points of 5 meters. The intensity value of the magnetic field as a result of the measurement is then carried out daily corrections and IGRF corrections to obtain total anomalies. This study also used Second Vertical Derivative Filter (SVD) to obtain residual anomalies that are useful to emphasize the existence of anomalous limits. The result was obtained magnetic intensity on residual anomaly map with a range of -8.56 nT to 3.23 nT. The presence of high anomalies with values of 1.47 nT to 3.23 nT in the vicinity of the outscaping indicates the spread of buried source sites. Then 3D modeling is done to obtain distribution of suseptibilities distribution. The results showed a suseptibilities value of 0.0002 to 0.0053 SI interpreted as a hidden site spread.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | geoarcheology, magnetic, petirtaan sumberbeji, second vertical derivative, geoarkeologi, magnetik, petirtaan sumberbeji, second vertical derivative. |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G155 Tourism T Technology > TA Engineering (General). Civil engineering (General) > TA417.3 Magnetic testing. |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Lutfillah Kurniawan |
| Date Deposited: | 07 Mar 2021 21:04 |
| Last Modified: | 26 Jun 2024 05:35 |
| URI: | http://repository.its.ac.id/id/eprint/83707 |
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