Santoso, Karin Maulidya (2026) Identifikasi Persebaran Air Lindi Di Bawah Permukaan Menggunakan Metode Very Low Frequency Electromagnetic (VLF-EM) Di TPA Ngipik, Kabupaten Gresik. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Air Lindi Merupakan Cairan Hasil Peresapan Air Hujan Pada Timbunan Sampah Yang Mengandung Berbagai Zat Pencemar Dan Berpotensi Mencemari Tanah Serta Air Tanah, Terutama Pada TPA Yang Masih Menggunakan Sistem Open Dumping. Penelitian Ini Bertujuan Untuk Mengidentifikasi Pola Dan Arah Persebaran Air Lindi Di Kawasan TPA Ngipik Kabupaten Gresik Berdasarkan Hasil Interpretasi Anomali Very Low Frequency Electromagnetic (VLF-EM) Dan Penampang Resistivitas Bawah Permukaan Hasil Inversi Untuk Menentukan Zona Yang Diduga Sebagai Persebaran Air Lindi. Akuisisi Data Dilakukan Pada Lima Lintasan Di Sekitar Area Timbunan Sampah Dengan Jarak Antar Titik Pengukuran Sebesar 5 m. Tipper Data VLF-EM (Inphase Dan Quadrature) Diolah Menggunakan Filter Noise Assisted Multivariate Empirical Mode Decomposition (NA-MEMD). Hasil Pengolahan Diinterpretasikan Secara Kualitatif Menggunakan Filter Karous-Hjelt Berupa Penampang Rapat Arus Semu Dan Secara Kuantitatif Melalui Proses Inversi, Sehingga Diperoleh Model Penampang Resistivitas 2D Yang Mendekati Kondisi Sebenarnya. Hasil Interpretasi Menunjukkan Adanya Zona Dengan Nilai Resistivitas Rendah Sebesar 2–6,5 Ωm Yang Diduga Berkaitan Dengan Air Lindi. Pola Persebaran Dugaan Air Lindi Mengikuti Arah Kontur Elevasi Muka Air Tanah, Yaitu Dari Arah Tenggara Menuju Barat Laut.
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Leachate Is A Liquid Produced From The Infiltration Of Rainwater Through Waste Piles, Containing Various Pollutants That Have The Potential To Contaminate Soil And Groundwater, Particularly In Landfills That Still Use Open Dumping Systems. This Study Aims To Identify The Pattern And Direction Of Leachate Distribution In The Ngipik Landfill, Gresik Regency, Based On The Interpretation Of Very Low Frequency Electromagnetic (VLF-EM) Anomalies And Subsurface Resistivity Sections Obtained From Inversion Processes To Determine Zones Suspected To Be Associated With Leachate Distribution. Data Acquisition Was Conducted On Five Survey Lines Around The Waste Pile Area With A 5 m Spacing Between Measurement Points. VLF-EM Tipper Data (Inphase And Quadrature Components) Were Processed Using The Noise Assisted Multivariate Empirical Mode Decomposition (NA-MEMD) Filter. The Processed Data Were Interpreted Qualitatively Using The Karous-Hjelt Filter To Produce Apparent Current Density Sections And Quantitatively Through An Inversion Process To Obtain A 2D Resistivity Model That Approximates Subsurface Conditions. The Interpretation Results Indicate The Presence Of Zones With Low Resistivity Values Ranging From 2–6.5 Ωm, Which Are Suspected To Be Associated With Leachate. The Suspected Leachate Distribution Pattern Follows The Direction Of The Groundwater Elevation Contours From Southeast To Northwest.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Air lindi, Filter Karous-Hjelt, Inversi, Resistivitas, VLF-EM, Inversion, Karous-Hjelt Filter, Leachate, Resistivity, VLF-EM |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences > GE300 Environmental management Q Science > QC Physics > QC665.E38 Electric fields. |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Karin Maulidya Santoso |
| Date Deposited: | 04 Aug 2026 06:53 |
| Last Modified: | 04 Aug 2026 06:53 |
| URI: | http://repository.its.ac.id/id/eprint/143343 |
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