DELINEATION OF SUBSIDENCE IN THE ALTERATION ZONE IN ULUBELU GEOTHERMAL FIELD BASED ON INTERFEROMETRY SYNTHETIC APERTURE RADAR TIME SERIES

Authors

  • Ahmad Zaenudin Jurusan Teknik Geofisika, Fakultas Teknik, Universitas Lampung, Indonesia
  • Ilham Tri Putra Sofiyadin Jurusan Teknik Geofisika, Fakultas Teknik, Universitas Lampung, Indonesia
  • Rachmat Arief Pusat Teknologi dan Data Penginderaan Jauh, LAPAN, Indonesia

DOI:

https://doi.org/10.23960/jge.v6i3.76

Keywords:

Ulubelu, Subsidence, InSAR

Abstract

Ulubelu is a geothermal region managed by Pertamina Geothermal Energy (PGE) located in Mount Kukusan, Sula, Kabawok, Kuripan and Rindingan. The learning of subsidence is required for disaster mitigation. This research use 33 SAR data of Sentinel1-A which bundled for generate an APS and then using multi temporal analysis to generate InSAR time series from 2018 September to 2017 April. InSAR time series can detect indication of subsidence practically and quickly. Decrease velocity of subsidence in the Ulubelu geothermal region is an average of 3,3 mm/yr (X=453.558, Y=9.412.437, 48 S zone. This subsidence is domination by altered rocks compaction. In the other hand, the geological structure (faults) and lithology also surface loading affected the subsidence. Pekon Gn. Tiga, Karang Rejo, Muara Dua and Pagar Alam are the worst of subsidence area. Mitigation must to be clear early for areas that have the worst subsidence in Ulubelu geothermal field.

References

Amin, T. C., Sidarto, S., Santosa & Gunawan, W. (1994). Geologi lembar Kotaagung, Sumatera. Bandung: Pusat Penelitian dan Pengembangan Geologi.

Archenita, D., Silvianengsih, Hamid, D., Natalia, M. & Misriani, M. (2015). Kajian land subsidence untuk perkuatan tanah (studi kasus Sawahlunto). Rekayasa Sipil, 12(2). ISSN:1858-3695.

Badan Pusat Statistik (BPS) Kabupaten Tanggamus. (2018). Kecamatan Ulu Belu dalam angka 2018. ISBN:978-602-351-027-6.

Bhatia, S. C. (2008). Fundamentals of remote sensing. Atlantic Publishers & Distributors (P) Ltd. ISBN-10:9788126909315.

Henneberger, R. C. & Browne, P. R. L. (1988). Hydrothermal alteration and evolution of the Ohakuri hydrothermal system, Taupo volcanic zone, New Zealand. Journal of Volcanology and Geothermal Research, 34, 211-121.

Husein, S., Setianto, A., Nurseto, S. T. & Koestono, H. (2015). Tectonic control to geothermal system of Way Panas, Lampung, Indonesia. Proceedings World Geothermal Congress. Melbourne: Australia.

Mulyadi. (2000). Ulubelu, the most developed geothermal area in South Sumatra. Proceedings World Geothermal Congress. Kyushu-Tohoku: Jepang.

Sarkowi, M. (2010). Identifikasi struktur daerah panasbumi Ulubelu berdasarkan analisa data SVD anomali bouguer. Jurnal Sains MIPA, 16(2), 111-118. ISSN:1978-1873.

Setyadi, B. (2016). Analisis penurunan muka tanah dengan small baseline subset differential SAR interferograms di Kota Bandarlampung. Lampung: Program Studi Teknik Geofisika, Universitas Lampung.

Siahaan, E. E., Sasradipoera, D. S., Silitonga, T. H., Pelmelay, C., Koestono, H., Mubarok, M. H. & Rifki, G. (2015). Success development drilling in Ulubelu green field in South Sumatra based on geological structure evidence, generate 4X55MW. Proceedings World Geothermal Congress 2015. Melbourne: Australia.

Soedarsono & Arief, R. B. (2017). Prediksi amblesan tanah (land subsidence) pada dataran aluvial di Semarang bagian bawah. Semarang: Jurusan Teknik Sipil dan Lingkungan. UNISSULA.

Suharno. (2013). Reservoir review of the Rendingan-Ulubelu-Waypanas (RUW) geothermal field, Lampung, Indonesia. Geothermal Resources Council (GRC) Transactions, 37, 471-477.

Suharno & Browne, P. R. L. (2000). Subsurface hydrothermal alteration at the Ulubelu geothermal field, Lampung, Southern Sumatra, Indonesia. Proceedings Twenty-fifth Workshop on Geothermal Reservoir Engineering, California: Stanford University.

White, P. J. Lawless, J. V. Terzaghi, S. & Okada, W. (2005). Advances in subsidence modelling of exploited geothermal fields. Proceedings World Geothermal Congress, Antalya, Turkey.

Zaenudin, A., Haerudin, N., Darmawan, I. G. B. & Wibowo, Y. A. (2017). Eksplorasi sumber daya mineral remote sensing, geologi dan geofisika - buku ajar. Bandarlampung: Pusaka Media, Korpri Jaya Sukarame. ISBN:978-602-54520-26-9

Downloads

Additional Files

Published

2020-11-24

How to Cite

Zaenudin, A., Putra Sofiyadin, I. T., & Arief, R. (2020). DELINEATION OF SUBSIDENCE IN THE ALTERATION ZONE IN ULUBELU GEOTHERMAL FIELD BASED ON INTERFEROMETRY SYNTHETIC APERTURE RADAR TIME SERIES. JGE (Jurnal Geofisika Eksplorasi), 6(3), 190–196. https://doi.org/10.23960/jge.v6i3.76

Issue

Vol. 6 No. 3 (2020)

Section

Articles

Citation Check

License

Authors/Readers/Third Parties can read, print and download, redistribute or republish the article (e.g. display in a repository), translate the article, download for text and data mining purposes, reuse portions or extracts from the article in other works, sell or re-use for commercial purposes, remix, transform, or build upon the material, they must distribute their contributions under the same license as the original Creative Commons Attribution-NonComercial (CC BY-NC).