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Muhammad Kadri
UNIMED
Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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IDENTIFIKASI DUGAAN ADANYA AIR TANAH DENGAN METODE GEOLISTRIK DI DESA SUMBER PADI KECAMATAN LIMAPULUH KABUPATEN BATU BARA SUMATERA UTARA Akhiruddin Rambe; Muhammad Kadri
EINSTEIN (e-Journal) Vol 9, No 2 (2021): EINSTEIN (e-Journal)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (461.998 KB) | DOI: 10.24114/einstein.v9i2.26192

Abstract

Penelitian ini bertujuan untuk mengidentifikasi potensi air tanah dan mengetahuipemetaan lapisan akuifer dengan metode geolistrik di desa Sumber padi. Pengukuran dilakukan dengan metode geolistrik menggunakan alat ARES-G4 v4,7 (Automatic Resistivity System. Pengukuran metode geolistrik dilakukan dengan membentangkan kabel elektroda serta menginjeksikan arus ke dalam tanah melalui elektroda sehingga dipantulkan beda potensial dan didapat harga resistivitas semu. Kemudian data diolah menggunakan Res2Dinv untuk mendapatkan penampang kontur 2D dari nilai resistivitas lapisan batuan. Hasil penelitian menunjukkan bahwa di bawah permukaan daerah Desa Sumber Padi Kecamatan Limapuluh Kabupaten Batu Bara terdapat air tanah pada lapisan pasir kerikil dengan nilai resistivitas 80-400Ωm di kedalaman 1,25m – 26m, kemudian terdapat juga lapisan batuan aluvium 500-800Ωm, dan lapisan batuan dasar tak lapuk dengan nilai resistivitas 900-1000+Ωm. Berdasarkan pengamatan kondisi di permukaan dan hasil analisis data resistivitas, lapisan yang berada di Desa Sumber Padi merupakan lapisan pembawa air (akuifer), yaitu lapisan jenuh air dibawah permukaan tanah yang dapat menyimpan dan meneruskan air dalam jumlah yang cukup.
KARAKTERISASI STRUKTUR BAWAH TANAH DI DAERAH POTENSI GEOTHERMAL SORIK MARAPI KABUPATEN MANDAILING NATAL DENGAN METODE MAGNETIK Yosni Destina Simanullang; Muhammad Kadri
EINSTEIN (e-Journal) Vol 8, No 2 (2020): EINSTEIN (e-Journal)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (373.668 KB) | DOI: 10.24114/einstein.v8i2.15286

Abstract

The aim of the study is determine the characterization of geothermal potential area using magnetic methods and identification of rock constituent minerals by XRD test in the geothermal area of Roburan Dolok Sorik Marapi Village, Mandailing Natal Regency, Geographically the area is at coordinates 0o44'49'' SL and 99o31'32'' EL. Field data were obtained by magnetic methods using PPM (Proton Precision Magnetometer), GPS (Global Positioning System) and Geological Compass. The data is processed using Microsoft Excel, Surfer11, and Mag2dc software, so that the susceptibility is interpreted by color coding. The XRD test was carried out using a Jeol-350 Shimadzu 6100 diffractometer. Data collection was performed at 30 measurement points. The results of the study qualitatively have magnetic anomaly values ranging from -20 nT to 420 nT. The results of quantitative interpretation of A-A’ incision modeling show that the study area has a susceptibility value ranging from -0,011 to 0.0343 (in SI) and is a clastic sedimentary rock (sandstone, siltstone, claystone). Mineral constituents of geothermal rocks Sorik Marapi is quartz (O2Si) with a trigonal crystal system (hexagonal axes) with a crystal size of 9,655,267 Å. The mineral is the main constituent mineral of sandstone.
Co-Authors Akhiruddin Rambe Yosni Destina Simanullang