Analisis Persebaran Spasial Air Lindi menggunakan Metode Magnetik di Kawasan Tpa Ngipik, Kabupaten Gresik

Herwiyanti, Ratih Rara (2026) Analisis Persebaran Spasial Air Lindi menggunakan Metode Magnetik di Kawasan Tpa Ngipik, Kabupaten Gresik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Metode magnetik pada penelitian ini untuk mengidentifikasi persebaran air lindi di kawasan TPA Ngipik, Kabupaten Gresik. Akuisisi data dilakukan pada enam lintasan dengan spasi antar titik 5 meter menggunakan metode variasi harian dengan sistem base station looping. Data hasil pengukuran dikoreksi menggunakan koreksi International Geomagnetic Reference Field (IGRF) dan koreksi harian untuk memperoleh anomali medan magnet total, kemudian dipisahkan menjadi anomali regional dan lokal menggunakan upward continuation pada ketinggian optimum 150 meter. Interpretasi kualitatif dilakukan menggunakan Reduction to Pole (RTP), Gradien Horizontal, Vertikal, dan Analytical Signal, sedangkan interpretasi kuantitatif dilakukan menggunakan inversi Flower Pollination Algorithm (FPA) pada dua sayatan terpilih. Hasil interpretasi menunjukkan bahwa zona anomali magnetik dengan arah persebaran yang diperkirakan bergerak dari bagian selatan menuju bagian utara. Hasil inversi menunjukkan adanya dua sumber anomali pada masing-masing sayatan dengan kedalaman berkisar antara 4 hingga 10,5 meter di bawah permukaan. Hasil interpretasi tersebut didukung oleh hasil uji laboratorium air lindi yang menunjukkan bahwa sampel pada titik inlet IPAL masih mengandung bahan organik dan logam terlarut sebelum dilakukan proses pengolahan. Berdasarkan hasil penelitian, metode magnetik dapat digunakan untuk mengidentifikasi pola arah persebaran air lindi di kawasan TPA Ngipik.
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The magnetic method was used in this study to identify the distribution of leachate in the Ngipik Landfill area, Gresik Regency. Data acquisition was conducted along six transects with a 5-meter spacing between points using the daily variation method with a base station looping system. The measured data were corrected using the International Geomagnetic Reference Field (IGRF) correction and daily corrections to obtain total magnetic field anomalies, which were then separated into regional and local anomalies using upward continuation at an optimal height of 150 meters. Qualitative interpretation was performed using Reduction to Pole (RTP), Horizontal Gradient, Vertical Gradient, and Analytical Signal methods, while quantitative interpretation was conducted using the Flower Pollination Algorithm (FPA) inversion on two selected sections. The interpretation results indicate that the magnetic anomaly, distribution direction estimated to extend from the south toward the north. The inversion results indicate the presence of two anomaly sources in each cross-section, with depths ranging from 4 to 10.5 meters below the surface. These interpretation results are supported by leachate laboratory test results, which show that samples at the wastewater treatment plant (IPAL) inlet still contain organic matter and dissolved metals prior to the treatment process. Based on the research results, magnetic methods can be used to identify the distribution patterns of leachate in the Ngipik Landfill area.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Air Lindi, Anomali Magnetik, Metode Magnetik, Suseptibilitas Magnetik, TPA Ngipik, Leachate, Magnetic Anomaly, Magnetic Method, Magnetic Susceptibility, Ngipik Landfill
Subjects:	Q Science Q Science > QC Physics Q Science > QE Geology Q Science > QE Geology > QE1.F557 Magnetic anomalies--Measurement.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Ratih Rara Herwiyanti
Date Deposited:	24 Jul 2026 02:36
Last Modified:	24 Jul 2026 02:36
URI:	http://repository.its.ac.id/id/eprint/136930

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