Maula, Alifatul Nur Rohmah (2025) Aplikasi Metode GODT (Groundwater Confinement, Overliying Litology Strata Resistivity, Depth to Aquifer, Dan Thickness Of Aquifer) Untuk Pemetaan Potensi Air Tanah. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Krisis air yang disebabkan oleh perubahan iklim dan eksploitasi air tanah yang berlebihan menuntut strategi eksplorasi sumber daya air tanah yang efisien. Penelitian ini bertujuan untuk memetakan sebaran potensi akuifer serta mengevaluasi akurasi model GODT di Pulau Ternate, yang dikembangkan dari model GOD (Groundwater confinement, Overlying lithology resistivity, Depth to aquifer) melalui penambahan parameter ketebalan akuifer (T). Metodologi yang digunakan mengintegrasikan data inversi geolistrik 1-D dengan Multi-Criteria Decision Analysis (MCDA) melalui dua teknik pembobotan: pembobotan konvensional berbasis literatur dan Analytical Hierarchy Process (AHP). Dataset terdiri atas 37 titik pengukuran geolistrik 1-D dan 58 titik data sumur untuk validasi muka air tanah. Hasil pemodelan menunjukkan dominasi sistem akuifer tertekan di wilayah utara Pulau Ternate Hasil pemodelan menunjukkan dominasi sistem akuifer tertekan di wilayah utara Pulau Ternate. Indeks potensi air tanah dari pendekatan GODT-MCDA dan GODT-AHP diklasifikasikan ke dalam empat kategori, dengan pola sebaran yang bervariasi namun menunjukkan konsistensi pada zona tertentu. Wilayah dengan potensi air tanah tinggi umumnya tersebar di bagian selatan, barat daya, serta pesisir timur laut, sedangkan potensi rendah mendominasi wilayah utara hingga timur laut pulau. Sedangkan wilayah dengan potensi air tanah rendah secara spasial tersebar dominan di bagian utara hingga timur laut Pulau Ternate. Evaluasi akurasi menggunakan regresi linear sederhana menunjukkan korelasi yang signifikan antara indeks GODT dan data ketebalan kolom air sumur, yang mengonfirmasi efektivitas tinggi pendekatan model GODT dalam memprediksi produktivitas akuifer di wilayah vulkanik
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The water crisis, driven by climate change and excessive groundwater exploitation, necessitates efficient groundwater resource exploration strategies. This study aims to map the distribution of aquifer potential and evaluate the accuracy of the GODT model in Ternate Island, developed from the GOD model (Groundwater confinement, Overlying lithology resistivity, Depth to aquifer) by incorporating the aquifer thickness (T) parameter. The methodology integrates 1-D geoelectric inversion data with Multi-Criteria Decision Analysis (MCDA) using two weighting techniques: conventional literature-based weighting and the Analytical Hierarchy Process (AHP). The dataset consists of 37 1-D geoelectric measurement points and 58 well data points for groundwater level validation. The modeling results reveal the dominance of a confined aquifer system in the northern region of Ternate Island. The groundwater potential indices derived from the GODT-MCDA and GODT-AHP approaches were classified into four categories, exhibiting varied distribution patterns while demonstrating consistency in certain zones. Areas with high groundwater potential are predominantly distributed in the southern, southwestern, and northeastern coastal regions, whereas low potential dominates the northern to northeastern parts of the island. Accuracy evaluation using simple linear regression indicates a significant correlation between the GODT index and well water column thickness data, confirming the high effectiveness of the GODT model approach in predicting aquifer productivity in volcanic regions.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Geolistrik 1-D, GODT, Potensi air tanah, Multikriteria, AHP ; Geoelectricity 1-D, GODT, Groundwater potential, Multicriteria, AHP |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) G Geography. Anthropology. Recreation > GB Physical geography > GB1003.2 Groundwater. G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Alifatul Nur Rohmah Maula |
| Date Deposited: | 25 Jul 2025 02:50 |
| Last Modified: | 25 Jul 2025 02:50 |
| URI: | http://repository.its.ac.id/id/eprint/121254 |
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