Ismah, Septya Zahrina Azatil (2025) Pengembangan Sistem Monitoring Deformasi Tanggul Lumpur Sidoarjo (LUSI) dengan Low-Cost GNSS dan NTRIP Secara Real-Time Terintegrasi Website. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Bencana Lumpur Sidoarjo sejak tahun 2006 menuntut pemantauan deformasi tanggul penahan semburan yang krusial. Analisis pergerakan deformasi diperlukan untuk memahami pola pergerakan tanah dan area ketidakstabilan. Global Navigation Satellite System (GNSS) berpotensi besar, namun perangkat geodetik konvensional mahal dan sering terkendala. Penelitian ini mengembangkan sistem pemantauan deformasi tanggul berbasis low-cost GNSS yang menggunakan modul U-blox F9P dan Raspberry Pi 5, dengan pendekatan real-time menggunakan koreksi Networked Transport of RTCM via Internet Protocol (NTRIP) serta metode post-processing otomatis. Sistem ini terdiri dari base station yang berfungsi sebagai penyedia koreksi dan pengunggah data mentah, serta rover yang menerima koreksi, mengolah data via RTKLib melalui modul seperti RTKRCV untuk real-time dan RNX2RTKP untuk post-processing otomatis, kemudian mengunggah hasilnya. Data dari perangkat diunggah ke Dropbox, lalu disinkronkan ke Firebase untuk visualisasi real-time di website SHIFT PPLS. Pengujian statik 2 jam di enam titik Lapindo melibatkan analisis kecepatan deformasi menggunakan regresi linier, Root Mean Square Error (RMSE), serta uji statistik F dan T dengan selang kepercayaan 95%, membandingkan hasil low-cost GNSS dengan GPS Geodetik Trimble SPS855 sebagai ground truth dan efektivitas sumber koreksi, NTRIP base lokal dan CORS BIG. Hasil penelitian menunjukkan sistem berhasil diimplementasikan, menyediakan data deformasi yang kompleks, termasuk pergerakan horizontal ke arah barat laut dan uplift vertikal, dengan kecepatan sangat tinggi di beberapa titik seperti PG12 dan PG20. Low-Cost GNSS terbukti mampu menghasilkan data posisi dengan akurasi dan presisi yang memadai. Uji statistik F mengindikasikan base station PPLS yang lebih dekat secara signifikan meningkatkan homogenitas varians atau presisi antara low-cost GNSS dan geodetik. Uji statistik T membuktikan tidak ada perbedaan signifikan secara statistik pada rata-rata pengukuran antara low-cost GNSS dan geodetik saat menggunakan base PPLS untuk semua titik. Ini menegaskan bahwa optimalisasi base station lokal secara signifikan meningkatkan kualitas dan komparabilitas data. Dengan demikian, sistem low-cost GNSS ini merupakan solusi alternatif yang efektif dan efisien biaya untuk pemantauan deformasi tanggul yang akurat dan berkelanjutan.
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The Sidoarjo Mudflow Disaster since 2006 has necessitated crucial deformation monitoring of the embankment containing the mudflow. Analysis of deformation velocity is required to understand ground movement patterns and areas of instability. Global Navigation Satellite System (GNSS) holds great potential, yet conventional geodetic devices are expensive and often constrained. This research develops an embankment deformation monitoring system based on Low-Cost GNSS using U-blox F9P and Raspberry Pi 5 modules, with a real-time approach utilizing Networked Transport of RTCM via Internet Protocol (NTRIP) corrections and automatic post-processing methods. The system comprises a base station (functioning as a correction provider and raw data uploader) and a rover (receiving corrections, processing data via RTKLib through modules like RTKRCV for real-time and RNX2RTKP for automatic post-processing, then uploading results). Data from the devices are uploaded to Dropbox, then synchronized to Firebase for real-time visualization on the SHIFT PPLS website. Two-hour static tests at six Lapindo points involved deformation velocity analysis using linear regression, Root Mean Square Error (RMSE), and F and T statistical tests with a 95% confidence interval, comparing Low-Cost GNSS results with Trimble SPS855 Geodetic GPS as ground truth and evaluating the effectiveness of correction sources, local NTRIP base and CORS BIG. Research findings show the system was successfully implemented, providing complex deformation data, including horizontal movement towards the northwest and vertical uplift, with very high velocities at certain points like PG12 and PG20. The Low-Cost GNSS proved capable of yielding position data with adequate accuracy and precision. The F statistical test indicates that the closer PPLS base station significantly improves variance homogeneity or precision between Low-Cost GNSS and geodetic GNSS. Furthermore, the T statistical test proves no statistically significant difference in mean measurements between Low-Cost GNSS and geodetic GNSS when utilizing the PPLS base for all points and coordinate components. This affirms that optimizing the local base station significantly enhances data quality and comparability. Consequently, this Low-Cost GNSS system stands as an effective and cost-efficient alternative solution for accurate and sustainable embankment deformation monitoring.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Deformasi tanggul, low-cost GNSS, lumpur sidoarjo, NTRIP, real-time, post-processing, pemantauan real-time, Low-Cost GNSS, embankment deformation, NTRIP, real-time, post-processing, real-time monitoring |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) > G109.5 Global Positioning System G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems. Q Science > QE Geology > QE598 Land subsidence Q Science > QE Geology > QE604 Deformation T Technology > T Technology (General) > T58.6 Management information systems |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29101-(S2) Master Thesis |
| Depositing User: | Septya Zahrina Azatil Ismah |
| Date Deposited: | 26 Jul 2025 06:45 |
| Last Modified: | 26 Jul 2025 06:45 |
| URI: | http://repository.its.ac.id/id/eprint/121766 |
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