Pemodelan 3D Data Ground Penetrating Radar (GPR) Studi Kasus: Situs Joko Dhahar Desa Terung Wetan, Krian, Sidoarjo

Murdaningtyas, Dyah Ayu (2019) Pemodelan 3D Data Ground Penetrating Radar (GPR) Studi Kasus: Situs Joko Dhahar Desa Terung Wetan, Krian, Sidoarjo. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Banyak situs bersejarah ditemukan di Desa Terung Wetan, contohnya adalah dua situs sumur tua, sebuah candi, dan makam seorang putri (anak dari Raden Husein, Adipati Terung). Di salah satu sumur tersebut (Situs Joko Dhahar) telah dilakukan penggalian dan ditemukan batu-bata peninggalan Jaman Majapahit pada kedalaman ± 0.2. Metode Ground Penetrating Radar (GPR) diaplikasikan untuk mengidentifikasi Situs Joko Dhahar, serta untuk mengetahui struktur situs tersebut dengan lintasan sebanyak 28 lintasan (17 U-S dan 11 B-T) berbentuk grid dengan spasi lintasan utara-selatan 1 m, sedangkan spasi lintasan timur-barat 2 m. Data hasil pengukuran tersebut kemudian diolah dengan menggunakan Adjust Signal Position, DEWOW, Inverse Amplitude Decay untuk signal processing, sedangkan untuk filtering dilakukan dengan Mean Filter, Remove Background Position, Suppress Dipping Features, dan fiter KL agar data terbebas dari noise yang mengganggu data. Setelah itu dilakukan Migrasi Stolt (FK Migraton) untuk membalikkan perambatan gelombang dan menentukan medan gelombang ERM (Exploding Reflector Model), terakhir dengan menerapkan pemodelan 3D yang menggambarkan situs. Setelah dilakukan pemodelan 3D, diketahui bahwa terdapat 2 bagian anomali yang konsisten, yaitu pada kedalaman 0.2-0.4 meter dan 0.6-0.8 meter. Untuk membuktikan hal tersebut kemudian dilakukan picking horizon dan slicing (slicing two way travel time (twt), slicing kedalaman, dan slicing amplitude). Dari ketiga slicing tersebut dapat diperkirakan bahwa situs berada pada daerah dengan nilai twt kecil dengan amplitudo yang besar pada kedalaman 0.225-0.28 meter sebagai batas atas dan 0.6-0.7 meter pada batas bawah. Situs mempunyai luas area 75.6 m2 dengan ketebalan situs antara 0.4-0.5 meter.
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> Numerous historical remains have been discovered in Terung Wetan Village, including two ancient wells, a temple, and the tomb of a princess believed to be the daughter of Raden Husein, the Duke of Terung. Excavations at one of the ancient well sites, the Joko Dhahar Site, revealed Majapahit-era artifacts at a depth of approximately 0.2 m below the ground surface. This study employed the Ground Penetrating Radar (GPR) method to identify the subsurface extent and structural characteristics of the site. Data acquisition was conducted along 28 survey lines arranged in a grid pattern, consisting of 17 north–south lines spaced 1 m apart and 11 west–east lines spaced 2 m apart. The recorded data were processed through several signal-processing steps, including Adjust Signal Position, DEWOW, and Inverse Amplitude Decay, followed by noise reduction using Mean Filter, Remove Background, Suppress Dipping Features, and KL Filter. Stolt Migration (FK Migration) was subsequently applied to reconstruct wave propagation and generate the Exploding Reflector Model (ERM), after which three-dimensional (3D) modeling was performed to visualize the subsurface structure of the archaeological site. The 3D model identified the upper and lower boundaries of the anomaly consistently at depths of approximately 0.2–0.4 m and 0.6–0.8 m, respectively. Horizon picking and slicing analyses, including two-way travel time (TWT), depth slicing, and amplitude slicing, further indicated that the archaeological remains are characterized by low TWT values and high reflection amplitudes at depths of approximately 0.225–0.28 m for the upper boundary and 0.6–0.7 m for the lower boundary. The estimated extent of the archaeological site is approximately 75.6 m², with an average thickness ranging from 0.4 to 0.5 m.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	GPR, Konstanta Dielektrik, Situs Joko Dhahar
Subjects:	C Auxiliary Sciences of History > CB History of civilization
Divisions:	Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Dyah Ayu Murdaningtyas
Date Deposited:	23 Jul 2026 01:51
Last Modified:	23 Jul 2026 01:51
URI:	http://repository.its.ac.id/id/eprint/64704

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