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AFRIZAL, TOMI
Earth System Science, Prince Of Songkla University, Phuket Campus, Phuket 83120, Thailand
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PEMETAAN STRUKTUR SITUS COT SIDI ABDULLAH PENINGGALAN KERAJAAN SAMUDERA PASAI BERDASARKAN SEBARAN MODEL RESISTIVITAS Agus Hari Pramana; Faisal Abdullah; Tomi Afrizal; Nazli Ismail
JURNAL GEOGRAFI Vol 12, No 2 (2020): JURNAL GEOGRAFI
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jg.v12i02.17205

Abstract

Metode DC-Resistivity konfigurasi Wenner telah diaplikasikan pada situs cagar budaya Cot Sidi Abdullah (CSA) di Desa Kuta Krueng, Kecamatan Samudra Pasai, Kabupaten Aceh Utara. Data geolistrik diukur pada 8 lintasan sejajar dengan spasi lintasan 5 meter dari arah utara - selatan sepanjang situs dan spasi elektroda 0,5 meter. Berdasarkan hasil model penampang 2D diperoleh zona yang bersifat konduktif dengan kisaran nilai resistivitas 0,1 – 80 Ωm dan zona resistif dengan nilai reistivitas berkisar antara 100 – 600 Ωm dengan ketebalan lapisan 1 meter. Keberadaan zona yang relatif konduktif disebabkan oleh adanya intrusi air asin yang terdapat disekeliling daerah itu, yaitu area tambak dan sungai. Sedangkan zona resistif terdapat secara merata di semua lintasan yang umumnya berada di tengah–tengah lintasan dan dapat diprediksikan sebagai bagian dari situs yang tertimbun dibawah permukaan. Zona resistif berupa batu bata yang berada di sekeliling situs dan menahan intrusi air asin masuk ke tengah. Oleh karena itu bangunan Situs CSA diprediksi memiliki luasan sekitar 26 m x 35 m dengan bangunan sekeliling berupa batu bata dengan ketebalan dinding situs 1,5 meter. Sedangkan bagian tengah adalah timbunan pasir yang tidak dipengaruhi oleh air asin.Kata kunci: Metode geofisika, Arkeologi, Cot Sidi Abdullah, Metode DC - Resistivity, Resolusi Model, RekontruksiThe DC-Resistivity method with Wenner configurations was applied to the cultural heritages of Cot Sidi Abdullah (CSA) in Kuta Krueng Village, Samudra Pasai District, North Aceh Regency. Resistivity data were measured on 8 parallel lines with 5 meterline spacing from north to south of the sites and 0.5 meter electrode spacing. The 2D model results show that there are conductive region with the value of resistivity from 0.1-80 Ωm and resistive region with resistivity values ranging from 100 - 600 with a thickness of 1 meter. The existence of the relatively conductive region is caused by the sea water intrusions which is found surrounding the area, such as fish and river areas. However the resistive region is evenly found in all of the lines which are generally located in the middle of line and it was predicted as a part of Cot Sidi Abdullah site buried under the surface. The resistive region is consist of brick wall structures which surrounding the site can hold the sea water intrusions into the center of the sites. Therefore it can be concluded that the CSA Site has 26 m x 35 m areas which is surrounded by the brick structures with 1.5 meters thick. Howeverthe middle part of the site is filled with a sand material that is not affected by salt water.Key words: Geophysics Method, Archaeology, Cot Sidi Abdullah, DC- Resistivity Method, Model Resolution, Reconstruction
Application of magnetic method for mapping buried structures around archaeological site of Masjid Tuha Indrapuri CUT INTAN KEUMALA; TOMI AFRIZAL; MUHAMMAD SYUKRI SURBAKTI; NAZLI ISMAIL
Jurnal Natural Volume 20 Number 2, June 2020
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (331.814 KB) | DOI: 10.24815/jn.v20i2.16507

Abstract

Magnetic gradiometer survey has been conducted on the yard of the archaeological site of Masjid Tuha Indrapuri, Aceh Besar Regency, Aceh Province. The site is one of the oldest mosques erected during the Aceh Sultanate period. Magnetic method was applied for mapping archaeological structures buried beneath the surface. Total magnetic field data were measured using Proton Precession Magnetometer with grid spacing of 2 meters between stations covering the entire area of the site. Diurnal and international geomagnetic reference field data were corrected to the measured data in order to calculate total magnetic field anomalies that were influenced by the buried magnetic objects. The total magnetic field anomalies distribution shows two elongated structures with U-shaped patterns surrounding the mosque. The patterns are also revealed in reduction to the pole and derivative vertical filters of the total field anomaly data. The anomaly patterns are considered a response from the rest of the buried fences that were built around the mosque in the past.
Application of gravity method in cultural harritage Cot Sidi Abdullah Site, Samudera Pasai, North Aceh NOVIA PURNAMA SARI; TOMI AFRIZAL; FAISAL ABDULLAH; NAZLI ISMAIL
Jurnal Natural Volume 20 Number 3, October 2020
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (403.414 KB) | DOI: 10.24815/jn.v20i3.16920

Abstract

The gravity method was applied to the cultural heritage site of Cot Sidi Abdullah in Kuta Krueng Village, Samudera Pasai District, North Aceh Regency for mapping and reconstruction structure of the cultural heritage site and distribution of artifact objects buried in the subsurface. Data measurement was carried out in a grid with 2 meters spacing between the points to cover all area of the cultural heritage site. The model of gravity anomaly distribution from the vertical derivative results shows a square pattern of anomaly gravity surrounding the measurement areas. This anomaly pattern is thought as a response from the remaining walls of the site structure which are buried in the subsurface with anomalous values between 0.02 mGal/m - 0.08 mGal/m.  The estimation of the walls of the archaeological site from the anomalous response to this gravity value is proved by the excavation results in the southern part of the study area.  While the minimum value of the vertical derivative filter (-0.06 mGal/m to - 0.01 mGal/m) is the response from the area around the archaeological site.  The reconstruction results of the site based on the estimation of the walls with a length of ± 45 meters and a width of ± 40 meters.
Application of gravity method in cultural harritage Cot Sidi Abdullah Site, Samudera Pasai, North Aceh NOVIA PURNAMA SARI; TOMI AFRIZAL; FAISAL ABDULLAH; NAZLI ISMAIL
Jurnal Natural Volume 20 Number 3, October 2020
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v20i3.16920

Abstract

The gravity method was applied to the cultural heritage site of Cot Sidi Abdullah in Kuta Krueng Village, Samudera Pasai District, North Aceh Regency for mapping and reconstruction structure of the cultural heritage site and distribution of artifact objects buried in the subsurface. Data measurement was carried out in a grid with 2 meters spacing between the points to cover all area of the cultural heritage site. The model of gravity anomaly distribution from the vertical derivative results shows a square pattern of anomaly gravity surrounding the measurement areas. This anomaly pattern is thought as a response from the remaining walls of the site structure which are buried in the subsurface with anomalous values between 0.02 mGal/m - 0.08 mGal/m.  The estimation of the walls of the archaeological site from the anomalous response to this gravity value is proved by the excavation results in the southern part of the study area.  While the minimum value of the vertical derivative filter (-0.06 mGal/m to - 0.01 mGal/m) is the response from the area around the archaeological site.  The reconstruction results of the site based on the estimation of the walls with a length of ± 45 meters and a width of ± 40 meters.
Application of magnetic method for mapping buried structures around archaeological site of Masjid Tuha Indrapuri CUT INTAN KEUMALA; TOMI AFRIZAL; MUHAMMAD SYUKRI SURBAKTI; NAZLI ISMAIL
Jurnal Natural Volume 20 Number 2, June 2020
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v20i2.16507

Abstract

Magnetic gradiometer survey has been conducted on the yard of the archaeological site of Masjid Tuha Indrapuri, Aceh Besar Regency, Aceh Province. The site is one of the oldest mosques erected during the Aceh Sultanate period. Magnetic method was applied for mapping archaeological structures buried beneath the surface. Total magnetic field data were measured using Proton Precession Magnetometer with grid spacing of 2 meters between stations covering the entire area of the site. Diurnal and international geomagnetic reference field data were corrected to the measured data in order to calculate total magnetic field anomalies that were influenced by the buried magnetic objects. The total magnetic field anomalies distribution shows two elongated structures with U-shaped patterns surrounding the mosque. The patterns are also revealed in reduction to the pole and derivative vertical filters of the total field anomaly data. The anomaly patterns are considered a response from the rest of the buried fences that were built around the mosque in the past.
Analisis Litologi Bawah Permukaan Kawasan Longsor di Jalan Lintas Barat KM-25 dengan Resistivitas 2-Dimensi Amsir, Amsir; Meikel Suryanta Sembiring; Zakia Masrurah; Dian Darisma; Tomi Afrizal
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 4 (2025): Agustus 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i4.6032

Abstract

This study aims to analyse the subsurface lithology in the landslide-prone area at KM-25 West Cross Road using a 2-dimensional resistivity method with a dipole-dipole configuration on two measurement tracks. The inversion results reveal significant lithological heterogeneity, with a low resistivity zone (<50 Ωm) at a depth of 5-20 metres, interpreted as a water-saturated clay layer or weathered material. The physical properties of this layer contribute to increased pore pressure, potentially forming a slip plane. The transition zone between the saturated clay layer and hard rock with high resistivity (>100 Ωm) is identified as a geomechanically weak zone prone to ground movement, primarily when saturation occurs due to heavy rainfall. The resistivity cross-section of the second pass shows similar features, with a thicker and wider zone of very low resistivity (<30 Ωm), indicating the presence of soft clays or unconsolidated fill. These results emphasise the importance of early detection of subsurface resistivity contrasts as indicators of landslide potential. This research provides an essential contribution to disaster mitigation efforts and can serve as a basis for spatial planning and infrastructure design to enhance resilience against geological hazards.
Co-Authors Agus Hari Pramana Amsir, Amsir CUT INTAN KEUMALA Darisma, Dian Faisal Abdullah Meikel Suryanta Sembiring Nazli Ismail Nazli Ismail NOVIA PURNAMA SARI Surbakti, Muhammad Syukri Zakia Masrurah