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Aplikasi Metode Geolistrik untuk Identifikasi Situs Arkeologi di Pulau Laut, Natuna Pryambodo, Dino Gunawan; Troa, Reiner Arief
KALPATARU Vol 25, No 1 (2016)
Publisher : Pusat Penelitian Arkeologi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1695.105 KB) | DOI: 10.24832/kpt.v25i1.82

Abstract

Abstract. Pulau Laut is one of the outer islands in Republic of Indonesia and part of the international shipping lanes during past centuries. The evidence came in form of shipwrecks which also became archaeological sites. The purpose of this study is to determine the distribution of archaeological sites and its depth using Wenner configuration 2D geoelectric method which is achieved by using resistivitymeter multichanel S Field with three lines measurements. Data processing, analysis, and interpretation were performed using software RES2DINV. The results then obtained direction on line one southwest - Northeast, the vessel is allegedly at positions 21-24 m from the southwest, the value of resistivity is between 54, 3-124 Ωm with depth of 0-3 m subsurface. Line two is at the same direction with line one and the vessel is allegedly at positions 21-27 m from the southwest, a subsurface depth of 0-3 m and resistivity values range from 11.5 - 41.4 Ωm. Line three to the direction northwest - southeast is crosslined with track one and track two, allegedly the ship is at position 18-22 m from the northwest with a depth of 0 - 4 m above the ground and resistivity values between 56.7 - 205 Ωm. Abstrak. Pulau Laut merupakan salah satu pulau terdepan wilayah NKRI, merupakan jalur pelayaran internasional selama beradab-abad yang lampau. Terdapatnya situs-situs arkeologi kapal tengelam merupakan buktinya. Tujuan dari penelitian ini untuk menentukan sebaran situs arkeologi dan kedalamnnya berdasarkan metode geolistrik konfigurasi Wenner 2D yang menggunakan resistivitymeter multichannel S Field dengan tiga lintasan pengukuran. Proses pengolahan, analisis serta interpretasi data dilakukan dengan software Res2Dinv. Hasil proses, analisis dan interpretasi data, diperoleh pada lintasan satu dengan arah bentangan kabel barat daya – Timur laut, situs kapal diduga pada posisi 21 – 24 m dari arah barat daya, nilai resistivitas antar 54,3 – 124 Ωm dengan kedalaman 0 – 3 m dari atas permukaan tanah. Lintasan dua dengan arah bentangan kabel yang sama dengan lintasan satu, posisi 21 – 27 m dari arah barat daya,kedalaman 0 – 3 m dari atas permukaan tanah dan rentangan nilai resistivitas 11,5 – 41,4 Ωm diduga terdapat situs kapal. Lintasan tiga dengan arah bentangan kabel barat laut – tenggara merupakan lintasan yang memotong (crossline) lintasan satu dan lintasan dua, diduga keberadaan situs kapal pada posisi 18 – 22 m dari arah barat laut dengan kedalaman 0 – 4 m dari atas permukaan tanah dan nilai resistivitas antara 56,7 – 205 Ωm.
Identifikasi Akuifer Dangkal di Pulau Terdepan NKRI dengan Menggunakan Metode Geolistrik 2D: Studi Kasus Pulau Laut, Kab. Natuna Pryambodo, Dino Gunawan; Pihantono, Joko; Troa, Reiner Arief; Triarso, Eko
EKSPLORIUM Vol. 37 No. 1 (2016): MEI 2016
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2016.37.1.2667

Abstract

The need for fresh water to support community activities in the field of fisheries on the frontier island is necessary because this location has minimal condition to the source of fresh water. Geophysical research with 2D geoelectrical methods conducted to identify the aquifers in the area of Pulau Laut, Natuna Regency as the frontier island of United Country of Republic Indonesia (NKRI). In field, measurement is using six 2D geoelectric lines with Wenner configuration and 160 m cable stretching to obtain 26.9 m sub-surface depth penetration. Resistivity data in Pulau Laut used to identify the aquifer presence in research area. Aquifers are located on varies depth near the surface with a depth of 2.5 – 13 m in north line, PDAM line, and Air Paying line; 12 – 26.9 m in Kadur line, Air Bunga line, and Air Paying line. Resistivity value for each aquifer varies for each line. They are ranging from 0.651 – 14 Ωm. Lithologies, composing the aquifer, are sandstone unit in Kadur, Air Bunga, Talaga Tasik, and Air Paying lines; silstone in PDAM line; and limestone in the north line.