Delineation method of the archaeological structure of Kuta Batee Trumon fortress, South Aceh based on a total magnetic field anomaly

Badrul Munir, Nazli Ismail, Nasrullah Zaini, Muhammad Nanda, Manovri Yeni


Abstrak. Situs arkeologi Benteng Kuta Batee memiliki sejarah penting dimasa lalu namun telah mulai terlupakan. Kegiatan revitalisasi harus diterapkan untuk meningkatkan nilai-nilai penting dari situs tersebut. Pada upaya awal dari kegiatan revitalisasi benteng ini yaitu eksplorasi pada bagian – bagian situs yang masih tertimbun di bawah permukaan. Meskipun demikian, proses ini harus dilakukan dengan pendekatan non-destructive sehingga tidak akan merusak situs. Penggunaan metode geofisika seperti metode magnetik menjadi solusi untuk menyelesaikan masalah tersebut. Metode ini mampu menginvestigasi struktur di bawah permukaan berdasarkan perbedaan medan magnetik bawah permukaan. Sebanyak 941 titik pengukuran dengan jarak spasi per 2 m diterapkan pada kawasan situs seluas 52x50 m2. Berdasarkan hasil interpretasi, secara umum respons nilai tinggi dan rendah dari anomali medan magnetik total belum menunjukkan geometri benda anomali. Perhitungan lanjutan berupa transformasi sinyal analitik akan bernilai maksimum amplitudonya ketika berada di atas tepi benda anomali. Sedangkan perhitungan tilt derivative akan bernilai positif amplitudonya ketika berada di atas anomali dan nilai negatif berada di luar sumber anomali. Keadaan ini bersesuaian dengan respons anomali bawah permukaan pada struktur yang masih utuh. Meskipun demikian, sebagai validasi yang lebih optimal, hasil perlu dilakukan kajian metode geofisika lain dan proses ekskavasi perlu diterapkan agar proses revitalisasi bisa direalisasikan.


Abstract. The archaeological site of Kuta Batee Fort has an important history in the past but is starting to be forgotten. Revitalization activities of this fort should be implemented to enhance the important values of the site. The initial effort of this fort revitalization activity was exploration of parts of the site that were still buried beneath the surface. However, this process must be carried out with a non-destructive approach so that it will not damage the archaeological site. The use of geophysical methods such as the magnetic method is a solution to solve these problems. is able to investigate subsurface structures based on subsurface magnetic field differences. A total of 941 stations with a spacing of 2 m were applied to cover a site area of 52x50 m2. Based on the interpretation of the results, In general, the response of the high and low values of the total magnetic field anomaly has not shown the geometry of the anomalous body. Further calculations in the form of an analytical signal transformation will have the maximum value of its amplitude when it is above the edge of the anomalous body. While the calculation of the tilt derivative will have positive amplitude when it is above the anomaly and a negative value is outside the source of the anomaly. This situation corresponds to subsurface anomalous responses to intact structures. However, as a more optimal validity, it is necessary to study other geophysical methods and the excavation process needs to be applied in order to realize the revitalization process.


Geoarchaeology; Magnetic method; Signal analytic; Tilt derivative; Fort of Kuta Batee Trumon

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