Identifikasi Rembesan Pada Tanggul Lumpur Sidoarjo (LUSI) Lintasan P75-P76, P67-P77, DAN P78-P79 Dengan Menggunakan Metode Self-Potential

Novanti, Nadila Ayu (2022) Identifikasi Rembesan Pada Tanggul Lumpur Sidoarjo (LUSI) Lintasan P75-P76, P67-P77, DAN P78-P79 Dengan Menggunakan Metode Self-Potential. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Studi stabilitas tanggul merupakan salah satu upaya untuk mengetahui kondisi ketahanan tanggul. Kegiatan pemantauan badan tanggul dapat memberikan informasi terkait indikasi adanya kerusakan pada badan tanggul sehingga upaya pencegahan dan perbaikan dapat dilakukan lebih awal. Penelitian ini dilakukan untuk mengidentifikasi rembesan pada tanggul Lumpur Sidoarjo (LUSI). Tanggul yang terletak di daerah Porong, Sidoarjo, sering mengalami kegagalan tanggul bahkan hingga jebol. Pada penelitian ini, identifikasi kondisi bawah permukaan tanggul LUSI dilakukan dengan metode self-potential (SP). Interpretasi bawah permukaan yang dilakukan menggunakan metode Ensemble Kalman Inversion memperlihatkan adanya indikasi anomali SP di beberapa titik pada tiga lintasan terukur yaitu P75-P76, P67-P77, dan P78-P79. Hasil penelitian menerangkan korelasi yang ekuivalen antara amplitudo anomali dengan intensitas rembesan. Interpretasi data SP menggambarkan adanya 4 anomali yang terdeteksi berada pada jarak 211 dan jarak 324 hingga 407 meter pada P75-P76. Selanjutnya terdapat 9 anomali sepanjang lintasan P67-P77 yang mencirikan akumulasi fluida ataupun adanya erosi internal pada badan tanggul. Selain itu, terdapat 4 anomali pada Lintasan P78-P79 yang masing-masing berada pada jarak 47, 108, 162, dan 182 dengan penafsiran sumber anomali berupa akumulasi fluida yang berada pada badan tanggul (berada di kedalaman 15 meter). Interpretasi data SP menggunakan EKI berhasil memperlihatkan hasil yang linier dengan kondisi lapangan observasi.
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Study of embankment stability is one of the ways to discover the embankment condition. Monitoring of the embankment body can provide information related to indications of damage to the body so that some preventions and reconstructions can be carried out earlier. This study was conducted to identify seepage failure on the Sidoarjo mud embankment (LUSI). The embankment, located in Porong, Sidoarjo, East Java, had collapsed several times. In this study, identifying subsurface conditions of the LUSI embankment was carried out using the SelfPotential (SP) method. Subsurface interpretation using Ensemble Kalman Inversion (EKI) method shows the indications of SP anomalies at several points on three measured lines, which are P75-P76, P67-P77, and P78- P79. The results of the study discovered the equivalent correlation between the amplitude of the anomaly and the intensity of seepage. The SP data interpretation showed the presence of 4 anomalies detected at the distance of 211 and 324 to 407 meters at P75-P76. Furthermore, there were 9 anomalies along the P67-P77 line that characterized fluid accumulation or internal erosion. In addition, there are 4 anomalies along the P78-P79 line that are located at a distance of 47, 108, 162, and 182, respectively, with the interpretation of anomalies sources in the form of fluid accumulation in the embankment body (about 15 meters depth). The interpretation of SP data using EKI successfully indicates similarities between the calculated data and the survey area's condition.

Item Type:	Thesis (Other)
Additional Information:	RSFi 551 Nov i-1
Uncontrolled Keywords:	Ensemble Kalman Inversion, Identifikasi Rembesan, Self-Potential, TanggulLUSI
Subjects:	G Geography. Anthropology. Recreation > GB Physical geography
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Mr. Tondo Indra Nyata
Date Deposited:	07 Mar 2024 03:30
Last Modified:	07 Mar 2024 03:30
URI:	http://repository.its.ac.id/id/eprint/107781

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