Nainggolan, Rompu Alden Oskanius (2024) Identifikasi Akuifer Dan Electrical Stratigraphy Dengan Menggunakan Metode Automatic Audio-Frequency Magnetotelluric (ADMT) Di Wilayah Latek, Kecamatan Bangil, Kabupaten Pasuruan. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Cekungan Air Tanah (CAT) Pasuruan merupakan cekungan air tanah yang berada di Jawa Timur dengan luasan wilayah sebesar 1.596 km merupakan CAT dengan perkiraan potensi akuifer bebas sebesar 628 juta m3/tahun dan 43 juta m3/tahun potensi akuifer tertekan. PT Mitra Alam Segar merupakan perusahaan minuman dalam kemasan yang berada di salah satu wilayah geografis cekungan air tanah Pasuruan, yaitu kabupaten Pasuruan, dan memiliki ketergantungan terhadap air tanah sebagai bahan baku utama produk dan kegiatan bisnis perusahaan. Oleh karena itu, penelitian ini menggunakan metode eksplorasi geofisika yang masih baru diterapkan oleh praktisi kebumian dan pemetaan akuifer yaitu metode Automatic Audio-Frequency Magnetotelluric (ADMT). Metode ADMT menerapkan prinsip akuisisi data magnetotelurik dengan hasil pemodelan berupa distribusi resistivitas semu bawah permukaan. Telah dilakukan pengukuran metode ADMT pada 3 lintasan di PT Mitra Alam Segar dengan penetrasi kedalaman 300 meter. Data sekunder pendukung interpretasi data ADMT adalah data bor dan data pengukuran resistivitas 2D pada lintasan yang sama dengan metode ADMT. Hasil interpretasi menunjukkan akuifer potensial berada di posisi lateral 70—90 m di kedalaman 0 m s.d -30 m dari mean sea level untuk lintasan 1, posisi lateral 2—22 m di kedalaman -5 m s.d. -8 m dan kedalaman -112 m s.d. -141 m dari mean sea level untuk lintasan 2, dan posisi lateral 16—25 m di kedalaman -78 m s.d. -90 m dari mean sea level untuk lintasan 3. Identifikasi dilakukan dengan meninjau dari electrical stratigraphy model. Akuifer potensial di wilayah penelitan merupakan jenis akuifer air payau.
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The Groundwater Basin of Pasuruan is a groundwater basin located at East Java which has an area of 1,596 km with an estimated potential unconfined aquifer of 628 million m3/year and 43 million m3/year of confined aquifer. PT Mitra Alam Segar is one of bottled beverage companies located in the Pasuruan groundwater basin area and has a high demand for water as the main resource for business. Therefore, this exploration uses the latest method to map aquifer’s potential, called as Automatic Audio-Frequency Magnetotelluric System (ADMT). (ADMT) applies the principle of magnetoteluric data acquisition with results sub-surface relative resistivity distribution. The ADMT acquisition conducted at PT. Mitra Alam Segar measures as many as 3 lines with penetration of 300 meters underground. There are also secondary data consist of well log and 2D resistivity measurement data which located on the same line as ADMT acquisition line in order to improve the geological interpretation of ADMT measurement. The results showed that potential aquifers for each line were obtained in lateral positions 70-90 m at depth of 0 m to -30 m below mean sea level for line 1, lateral positions 2-22 m at depth of -5 m to -8 m and -112 m to -141 m below mean sea level for line 2, and lateral positions 16 m to 25 m at depth of -78 m to -90 m below mean sea level for line 3. The aquifer identification process uses electrical stratigraphy of the model. The potential aquifer in the study area is brackish aquifer.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | ADMT, Akuifer Air Payau, CAT Pasuruan, Electrical Stratigraphy, Brackish Aquifer, Electrical Stratigraphy, Pasuruan Groundwater Basin |
| Subjects: | G Geography. Anthropology. Recreation > GB Physical geography > GB1003.2 Groundwater. G Geography. Anthropology. Recreation > GE Environmental Sciences Q Science > QC Physics > QC610.3 Electric conductivity |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Rompu Alden Oskanius Nainggolan |
| Date Deposited: | 01 Feb 2024 02:53 |
| Last Modified: | 01 Feb 2024 02:53 |
| URI: | http://repository.its.ac.id/id/eprint/105852 |
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