Pendeteksian Kebocoran Geomembran Menggunakan Metode Resistivitas Dan Potensial Diri (Uji Fisis Skala Laboratorium

Fathin, Nisrina (2024) Pendeteksian Kebocoran Geomembran Menggunakan Metode Resistivitas Dan Potensial Diri (Uji Fisis Skala Laboratorium. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Geomembran merupakan sistem pelapis komposit yang banyak digunakan dalam sistem keamanan TPA karena sifatnya yang baik dalam memfilter kontaminan organik dan anorganik. Namun, geomembran dapat rusak akibat konstruksi, tusukan material berbahan kasar, pondasi yang tidak rata, dan korosi akibat lindi. Metode resistivitas dan potensial diri digunakan untuk mendeteksi kebocoran pada penelitian ini. Penelitian dilakukan dalam skala model dengan luas area pengukuran berukuran 1 x 1 m. Pengukuran dilakukan pada tiga jenis kondisi yaitu pengukuran tanpa kebocoran menggunakan tanah tanpa pembasahan, pengukuran dengan kebocoran menggunakan tanah tanpa pembasahan, dan pengukuran dengan kebocoran menggunakan tanah dengan pembasahan. Hasil dari pengukuran uji skala laboratorium SP pada kondisi awal dan kondisi kebocoran tanpa pembasahan menunjukkan rentang nilai SP -90 sampai -220 mV dan penampang resistivitas didominasi oleh resistivitas tinggi yaitu 74.8 sampai 237 Ωm. Sedangkan kondisi dengan kebocoran tanah menggunakan pembasahan memiliki sebaran nilai potensial diri 5 sampai 120 mV serta penampang resistivitas didominasi resistivitas bernilai 74.8 Ωm. Kebocoran dapat dideteksi pada kondisi 3 menggunakan metode potensial diri yang diindikasikan dengan adanya anomali potensial berupa peningkatan nilai potensial di sekitar kebocoran. Namun, metode resistivitas 2D pada kondisi yang sama belum dapat mendeteksi secara akurat kebocoran geomembran. Sedangkan kondisi 1 dan 2 kebocoran belum dapat dideteksi karena belum ada penambahan air yang berkaitan dengan penurunan konduktivitas elektrik dan belum ada kerusakan pada geomembran sebagai jalur konduksi arus.

Kata Kunci: Deteksi kebocoran, Geomembran, Metode resistivitas, Metode potensial diri

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Geomembranes are a widely used composite lining system in landfill safety systems due to their good properties in filtering organic and inorganic contaminants. However, geomembranes can be damaged by construction, puncture of rough materials, uneven foundations, and corrosion due to leachate. Resistivity and self-potential methods were used to detect leakage in this study. The research was conducted on a model scale with a measurement area of 1 x 1 m. Measurements were made in three types of conditions, namely measurements without leakage using soil without wetting, measurements with leakage using soil without wetting, and measurements with leakage using soil with wetting. The results of SP laboratory scale test measurements in initial conditions and leakage conditions without wetting show a range of SP values of -90 to -220 mV and a resistivity cross section dominated by high resistivity of 74.8 to 237 Ωm. While conditions with soil leakage using wetting have a range of self-potential values of 5 to 120 mV and a resistivity cross section dominated by resistivity worth 74.8 Ωm. Leakage can be detected in condition 3 using the self-potential method which is indicated by a potential anomaly in the form of an increase in potential value around the leak. However, the 2D resistivity method in the same condition has not been able to accurately detect geomembrane leakage. While conditions 1 and 2 leakage cannot be detected because there has been no addition of water associated with a decrease in electrical conductivity and there has been no damage to the geomembrane as a current conduction path.

Keywords: Leak detection, Geomembrane, Resistivity method, Self-potential method

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kata Kunci: Deteksi kebocoran, Geomembran, Metode resistivitas, Metode potensial diri =========================================================== Keywords: Leak detection, Geomembrane, Resistivity method, Self-potential method
Subjects:	Q Science > QC Physics > QC665.E38 Electric fields.
Divisions:	Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Nisrina Fathin
Date Deposited:	09 Aug 2024 02:05
Last Modified:	09 Aug 2024 02:05
URI:	http://repository.its.ac.id/id/eprint/114395

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