Pemodelan Numerik Data Potensial Diri (Self Potential)

Bayu Tambak Samudra, Dwa Desa Warnana
Submission Date: 2017-01-26 08:05:48
Accepted Date: 2017-03-17 10:12:43

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.

Keywords


Anomali; Data; Model; Potensial Diri

References


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