Electronic Theses and Dissertation

ABSTRAK
Situs cagar budaya Benteng Inong Balee di Lamreh, Aceh Besar, Indonesia, saat ini mengalami kerusakan yang cukup signifikan akibat abrasi pantai dan pengaruh lingkungan pesisir. Namun, informasi mengenai kondisi bawah permukaan serta keberadaan struktur arkeologi yang masih tertimbun di kawasan tersebut masih terbatas. Penelitian ini bertujuan untuk mengidentifikasi variasi nilai resistivitas, menghasilkan model resistivitas 2D, serta mendeteksi struktur bawah permukaan yang diinterpretasikan sebagai sisa benteng. Metode yang digunakan adalah resistivitas listrik 2D dengan Konfigurasi Wenner-Schlumberger. Pengolahan data dilakukan menggunakan perangkat lunak Res2Dinv. Model distribusi resistivitas bawah permukaan yang dihasilkan menunjukkan tiga zona resistivitas, yaitu rendah (20 – 110 Ωm), sedang (111 – 321 Ωm), dan tinggi (322 – 975 Ωm). Zona resistivitas tinggi diinterpretasikan sebagai material karbonat (batu gamping) yang berkaitan dengan struktur benteng. Struktur pondasi Benteng teridentifikasi pada Lintasan 3 dengan kedalaman sekitar 1 – 4 m, sedangkan sisa struktur dinding Benteng terdeteksi pada Lintasan 1, 2, 3 dan 4 pada kedalaman sekitar 1 – 4 m. Interpretasi ini diperkuat oleh observasi lapangan, di mana beberapa lintasan pengukuran berada tepat di atas sisa bangunan yang masih tampak di permukaan. Hasil ini menunjukkan bahwa metode resistivitas listrik 2D efektif dalam memetakan struktur arkeologi bawah permukaan.


Kata Kunci: Arkeologi, Benteng Inong Balee, Resistivitas Listrik, Res2Dinv, Wenner-Schlumbeger.

ABSTRACT The Inong Balee Fort cultural heritage site in Lamreh, Aceh Besar, Indonesia, is currently experiencing significant damage due to coastal abrasion and the influence of the coastal environment. However, information regarding subsurface conditions and the presence of buried archaeological structures in the area remains limited. This study aims to identify resistivity value variations, produce a 2D resistivity model, and detect subsurface structures interpreted as remnants of the fortress. The method used is 2D electrical resistivity with the Wenner–Schlumberger configuration. Data processing was carried out using Res2Dinv software. The resulting subsurface resistivity distribution model shows three resistivity zones: low (20 – 110 Ωm), medium (111 – 321 Ωm), and high (322 – 975 Ωm). The high resistivity zone is interpreted as carbonate material (limestone) associated with the fortress structure. The fortress foundation structure was identified along Line 3 at a depth of approximately 1 – 4 m, while remnants of the fortress wall structure were detected along Lines 1, 2, 3, and 4 at depths of approximately 1 – 4 m. This interpretation is supported by field observations, where several survey lines were located directly above visible structural remains on the surface. These results indicate that the 2D electrical resistivity method is effective for mapping subsurface archaeological structures. Keywords: Archaeology, Electrical Resistivity, Fort Inong Balee, Res2Dinv, Wenner-Schlumbeger.