Pemodelan Numerik Data Potensial Diri (Self Potential)

Samudra, Bayu Tambak (2017) Pemodelan Numerik Data Potensial Diri (Self Potential). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Masalah kuantitatif dalam metode potensial diri terkadang masih ditemukan. Beberapa asumsi dan metode inversi digunakan dalam proses pembuatan modelnya agar dicapai error yang sekecil mungkin sehingga makin mendekati kondisi sebenarnya. Telah dilakukan ”Pemodelan Numerik Data Potensial Diri (Self Potential)” untuk menginterpretasi secara kuantitatif anomali dan parameter geometri dari anomalinya. Asumsi model yang digunakan adalah geometri sederhana dari data potensial diri. Program untuk pemodelan numerik ini dibuat di perangkat lunak MATLAB yang meliputi pemodelan kedepan dan pemodelan kebelakang. Metode inversi yang dipakai yaitu metode yang dikembangkan oleh El-Araby (2003). Program yang dibuat selanjutnya diuji pada data sintetik (3 data) dan data sekunder (3 data). Berdasarkan hasil penelitian yang sudah dilakukan, untuk data sintetik, hasil RMS error-nya sebagian besar dibawah 10%. Di samping itu, untuk data sekunder, hasilnya sesuai dengan referensi yang dipakai, dimana data sekunder 1 dan 2 saling memvalidasi karena berada pada daerah yang sama namun beda lintasan pengukuran yang jenis sumber anomalinya adalah bola karena berkaitan dengan mineral tembaga. Sedangkan untuk data sekunder 3, sumber anomalinya adalah vertical cylinder, yaitu rembesan yang berhubungan dengan potensial streaming yang terjadi di daerah bendungan. ================================================================================================================== Quantitative problems in self-potential method sometimes still be found. Some of the assumptions and methods used in the model inversion in order to get the smallest possible error so perilously close to actual conditions. It has been done "Numerical Modeling of Self Potential Data" to quantitatively interpret anomalies and geometry parameters of the anomaly. Assumptions model that are used is the simple geometry of the self potential data. Program for numerical modeling is created in the MATLAB software that includes forward modeling and inverse modeling. The inversion method that is used is the method developed by El-Araby (2003). The program that created subsequently tested on synthetic data (3 data) and secondary data (3 data). Based on the research that has been done, for synthetic data, the results of all RMS error mostly is below 10%. In addition, secondary data, the results are in accordance with the reference that was used, in which secondary data 1 and secondary data 2 validating each other because they are in the same area but different line measurement that type of source anomaly was associated with the sphere for a copper mineral. As for the secondary data 3, the source of the anomaly was a vertical cylinder, that is seepage associated with streaming potential that occurs in the area of the dam.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Anomali, Data, Model, Potensial Diri, Anomaly, Self Potential
Subjects: Q Science > QA Mathematics > QA76 Computer software
Divisions: Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User: BAYU TAMBAK SAMUDRA
Date Deposited: 19 Apr 2017 02:45
Last Modified: 08 Mar 2019 03:24
URI: https://repository.its.ac.id/id/eprint/3411

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