Aplikasi Metode Geolistrik untuk Pendugaan Air Bawah Tanah Desa Karanganyar Kecamatan Bantaran Kabupaten Probolinggo Jawa Timur

Desa Karanganyar, Kecamatan Bantaran, Kabupaten Probolinggo merupakan salah satu daerah kekeringan. Daerah ini tersusun oleh lapisan produk Gunungapi Tengger yang terdiri dari tuff, breksi gunungapi, lava, dan lahar. Kondisi tersebut memungkinkan daerah tersebut mengalami krisis akan air tanah karena lapisan produk gunungapi memiliki karakteristik impermiabel atau kedap air. Untuk itu diperlukan penelusuran mengenai informasi dasar tentang letak keberadaan air tanah dengan cara survey geofisika menggunakan metode geolistrik resistivitas. Penelitian ini bertujuan untuk mengkaji potensi keberadaan air tanah di lokasi penelitian dan mengetahui kondisi litologi bawah permukaan dengan metode geolistrik tahanan jenis menggunakan konfigurasi Wenner dan Schlumberger. Berdasarkan hasil penelitian diketahui litologi penyusun di daerah pengukuran berupa batuan vulkanik (lempung tuffan, tuff, lahar tuffan, breksi, dan lava). Batuan yang berpotensi mengandung akuifer yaitu batuan lahar tuffan. Batuan lahar tuffan tersebar di ketiga titik pengukuran sehingga ketiga titik tersebut memiliki potensi akuifer. Pada titik KRA-1 akuifer yang dapat dijumpai diduga terdapat pada kedalaman 37,1 – 102,3 meter dengan nilai resistivitas 60,3 – 171,5 ohm meter, titik KRA-2 pada kedalaman 92,8 – 143,9 meter dengan nilai resistivitas 50,2 – 62,9 ohm meter, dan titik KRA-3 pada kedalaman 63,4 – 133,15 meter dengan nilai resistivitas 62,6 – 119,5 ohm meter.Kata Kunci: Karanganyar; Bantaran; Probolinggo; geolistrik; akuifer ABSTRACT Karanganyar Village, Bantaran District, Probolinggo Regency is one of the drought areas. This area is composed of layers of Tengger Volcano products consisting of tuff, volcanic breccias, lava, and lava. These conditions allow the area to experience a crisis of groundwater because the volcanic product layer has impermiable or waterproof characteristics. For this reason it is necessary to search for basic information about the location of the presence of groundwater by geophysical survey using the resistivity geoelectric method. This study aims to examine the potential presence of groundwater in the study site and determine the conditions of subsurface lithology with the geoelectric resistivity method using the Wenner and Schlumberger configurations. Based on the research results, it is known that the lithology of the constituents in the measurement area is volcanic rock (tuffan clay, tuff, lava tuffan, breccia, and lava). Rocks that have the potential to contain aquifers are tuffan lava rocks. Tuffan lava rocks are scattered in all three measurement points so that all three points have an aquifer potential. At the point of KRA-1 aquifer that can be found is suspected to be at a depth of 37.1 - 102.3 meters with a resistivity value of 60.3 - 171.5 ohm meters, a KRA-2 point at a depth of 92.8 - 143.9 meters with a value of resistivity 50.2 - 62.9 ohm meters, and KRA-3 points at depths of 63.4 - 133.15 meters with resistivity values of 62.6 - 119.5 ohm meter.

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Identification of Aquifer in the MIPA Faculty - University of Jember Using 1D Geoelectrical Resistivity Method with Schlumberger Array

Jurnal ILMU DASAR ◽

10.19184/jid.v21i2.13159 ◽

2020 ◽

Vol 21 (2) ◽

pp. 123

Author(s):

Bayu Buwana ◽

Nurul Priyantari ◽

Supriyadi Supriyadi

Keyword(s):

Volcanic Rocks ◽

Natural Sciences ◽

Subsurface Structures ◽

Resistivity Method ◽

Academic Activities ◽

Geoelectric Resistivity ◽

Geoelectrical Resistivity ◽

Resistivity Log ◽

The University ◽

Schlumberger Array

Faculty of Mathematics and Natural Sciences University of Jember located in Sumbersari District with lithological conditions in the form of volcanic rocks, lithosol soils, and regosol soils that are capable of absorbing water and potentially as aquifers. In point of fact, in the campus zona of the University of Jember including in the Faculty of Mathematics and Natural Sciences, there is always a shortage of freshwater for various academic and non-academic activities. Therefore, research needs to be conducted to assess the lithology of subsurface structures in the FMIPA zone so that the depth of groundwater layers and aquifer layers can be determined. The study was conducted using the Schlumberger array geoelectric resistivity method at 5 VES points. The results obtained in the form of resistivity log curves can be seen that at the five points VES has lithology in the form of clay, gravel, sandstone, and groundwater layer. Each VES point was identified the groundwater layer and some of them were identified as aquifers. The aquifer with the greatest thickness is found at point VES 2, which is to the west of the Baitul Ilmi Mosque, so it is recommended as the location of a new well.Keywords: lithology, aquifers, geoelectric resistivity method, groundwater.

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PEMETAAN AKUIFER AIR TANAH DI JALAN RINGROAD KELURAHAN MALENDENG DENGAN MENGGUNAKAN METODE GEOLISTRIK TAHANAN JENIS

JURNAL ILMIAH SAINS ◽

10.35799/jis.15.1.2015.6778 ◽

2015 ◽

Vol 15 (1) ◽

pp. 33 ◽

Cited By ~ 1

Author(s):

Dewi Sedana ◽

As’ari As’ari ◽

Adey Tanauma

Keyword(s):

Geophysical Method ◽

Low Resistivity ◽

Resistivity Method ◽

The Earth ◽

Groundwater Aquifers ◽

Working Principle ◽

Geoelectric Resistivity ◽

Subsurface Exploration

PEMETAAN AKUIFER AIR TANAH DI JALAN RINGROAD KELURAHAN MALENDENG DENGAN MENGGUNAKAN METODE GEOLISTRIK TAHANAN JENIS ABSTRAK Geolistrik merupakan salah satu metode geofisika yang dimanfaatkan dalam eksplorasi alam bawah permukaan. Prinsip kerja metode geolistrik adalah mempelajari aliran listrik di dalam bumi dan cara mendeteksinya di permukaan bumi. Penelitian ini bertujuan untuk memetakan akuifer Airtanah di Jalan Ringroad Kelurahan Malendeng berdasarkan resistivitas batuan bawah permukaan. Penelitian terdiri dari 4 titik sounding pada 1 lintasan dengan jarak setiap titik 40 meter. Hasil eksplorasi diolah dengan menggunakan software IP2WIN untuk melihat data perlapisan di bawah permukaan tanah berdasarkan nilai resistivitasnya (2D) dan pesebaran titik – titik terdapatnya akuifer Airtanah. Hasil penelitian menunjukkan bahwa akuifer Airtanah berada pada daerah yang dekat sungai yaitu pada titik 4 yang memiliki nilai resistivitas rendah kurang dari 123 Ωm. Kata kunci : Geolistrik tahanan jenis, akuifer Airtanah, software IP2WIN. THE MAPPING OF GROUNDWATER AQUIFERS AT THE RINGROAD MALENDENG VILLAGE BY USING GEOELECTRIC RESISTIVITY METHOD ABSTRACT Geoelectric is a geophysical method that is utilized in natural subsurface exploration. The working principle of geoelectric method is to study the flow of electricity in the earth and how to detect them in the earth's surface. This study aims to map the aquifer Groundwater at the Ringroad Malendeng village based resistivity of the subsurface rocks. The study consisted of four points on 1-sounding track with the distance of each point 40 meters. Exploration results were processed using software IP2WIN to view data subsurface layering based on the value of the resistivity (2D) and point - the point of the presence of Groundwater aquifers. The results showed that the aquifer Groundwater is the area near the river is at point 4 which has a low resistivity value of less than 123 Ωm. Keywords: Geolistrik resistivity, Groundwater aquifers, IP2WIN software.

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