Analisis Potensi Air Tanah Dan Kerentanan Akuifer Di Pesisir Pulau Ternate Menggunakan Parameter Geolistrik Dan Hidrogeologi

Nur Aini, Ratna Amalia (2025) Analisis Potensi Air Tanah Dan Kerentanan Akuifer Di Pesisir Pulau Ternate Menggunakan Parameter Geolistrik Dan Hidrogeologi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jumlah penduduk Pulau Ternate yang terus meningkat dan distribusi air bersih yang belum merata menyebabkan permintaan air bersih semakin banyak. Guna membantu mengatasi permasalahan tersebut, penelitian ini dilakukan untuk mengetahui potensi air tanah dan kerentanan akuifer di pesisir Pulau Ternate menggunakan parameter geolistrik dan hidrogeologi. Penelitian ini menggunakan 69 data pengukuran Vertical Electrical Sounding (VES), 10 data uji pemompaan dan data muka air tanah dari sumur dan mata air di Pulau Ternate. Hasil interpretasi menunjukan lokasi penelitian memiliki 2 jenis akuifer, yaitu akuifer bebas dan akuifer tertekan. Akuifer di lokasi penelitian diidentifikasi tersusun dari satuan batuan endapan piroklastik, breksi vulkanik atau lava lapuk. Akuifer tersebut memiliki nilai resistivitas akuifer 30 – 300 Ωm, ketebalan 0.99 – 59.3 m, dan kedalaman 0.5 – 97.6 mbmt. Hasil perhitungan parameter dar – zarrouk dan estimasi parameter hidrogeologi menunjukkan nilai konduktansi longitudinal 0.00073 – 5.96 siemens, resistansi transversal 92.5 – 16790 Ωm², koefisien anisotropi 1.0 – 3.2, konduktivitas hidrolik 4.84 – 99.96 m/hari, dan transmisivitas 6 – 3313 m²/hari. Hasil pembobotan parameter resistansi transversal, koefisien anisotropi, konduktivitas hidrolik dan transmisivitas menggunakan metode Analytical Hierarchy Process (AHP) menunjukkan lokasi penelitian memiliki potensi air yang rendah hingga sangat tinggi dengan wilayah tenggara dan selatan diyakini memiliki potensi air tanah yang lebih besar dibandingkan wilayah lainnya. Analisis kerentanan akuifer menggunakan parameter konduktansi longitudinal menunjukkan bahwa sebagian besar lokasi penelitian memiliki kerentanan akuifer yang buruk dan hanya sedikit wilayah dengan kerentanan akuifer yang rendah, yaitu di wilayah selatan.
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The increasing population of Ternate Island and the uneven distribution of clean water have led to a growing demand for clean water. To help address this issue, this study was conducted to determine the potential of groundwater and the vulnerability of aquifers on the coast of Ternate Island using geophysical and hydrogeological parameters. This study utilized 69 Vertical Electrical Sounding (VES) measurement data, 10 pumping test data, and groundwater level data from wells and springs on Ternate Island. The interpretation results indicated that the study area has two types of aquifers: unconfined aquifers and confined aquifers. The aquifers in the study area were identified as composed of pyroclastic sedimentary rock units, volcanic breccia, or weathered lava. These aquifers have aquifer resistivity values of 30–300 Ωm, thicknesses of 0.99–59.3 m, and depths of 0.5–97.6 mbmt. The results of the Dar-Zarrouk parameter calculations and hydrogeological parameter estimates indicate longitudinal conductivity values of 0.00073–5.96 siemens, transverse resistivity of 92.5–16,790 Ωm², anisotropy coefficient of 1.0–3.2, hydraulic conductivity of 4.84–99.96 m/day, and transmissivity of 6–3313 m²/day. The results of weighting the parameters of transverse resistance, anisotropy coefficient, hydraulic conductivity, and transmissivity using the Analytical Hierarchy Process (AHP) method indicate that the study area has low to very high water potential, with the southeastern and southern regions believed to have greater groundwater potential than other regions. Analysis of aquifer vulnerability using the longitudinal conductivity parameter indicates that most of the study area has poor aquifer vulnerability, with only a few areas having low aquifer vulnerability, specifically in the southern region.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	geolistrik, hidrogeologi, kerentanan akuifer, potensi air tanah, Vertical Electrical Sounding, aquifer vulnerability, geoelectric, groundwater potential, hydrogeologic, Vertical Electrical Sounding
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) G Geography. Anthropology. Recreation > GB Physical geography G Geography. Anthropology. Recreation > GB Physical geography > GB1197.7 Groundwater flow. Reservoirs
Divisions:	Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Ratna Amalia Nur Aini
Date Deposited:	24 Jul 2025 08:09
Last Modified:	24 Jul 2025 08:09
URI:	http://repository.its.ac.id/id/eprint/121251

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