Mapping the Potential Liquefaction Area in Yogyakarta City Based on Ground Shear Strain Data

Ilham Ilham, Urip Nurwijayanto Prabowo, Sismanto Sismanto

Abstract


The appearance of liquefaction phenomena in some places in Yogyakarta city due to the 2006 earthquake indicates that the sediment in this area has a high potential to liquefy. Three main factors that caused liquefaction are ground shaking, lithological conditions, and groundwater depth. This study aims to investigate one of the three factors i.e ground shaking. For this purpose, the ground shear strain (GSS) data were analyzed for mapping the potential liquefaction area in Yogyakarta city. They were calculated from the seismic vulnerability index and PGA. The seismic vulnerability index was analyzed from a microtremor single station data recorded in 110 sites while PGA was calculated using a reference of the 2006 earthquake. The GSS value in the study area is at a range of 2.0 × 10−4 to 5.8 × 10−3 . In this range, the soils begin to be elastic-plastic so that they are susceptible to be fracture and settlement. The high GSS correlates with the location of the liquefaction due to the 2006 earthquake. The liquefaction potential map was obtained by comparing the GSS with liquefaction sites. The high liquefaction potential is located in the southern part of Yogyakarta city covering Mantrijeron, Mergangsan, Pakualaman, Umbulharjo, and Kotagede districts.


Keywords


liquefaction; microtremors; ground shear strain

Full Text:

PDF

References


BAPPENAS-BAPEDA DIY-UNDP, Profil Kebencanaan Provinsi Daerah Istimewa Yogyakarta 2008. Yogyakarta: BAPEDA DIY, 2008.

BAPPENAS, ”Preliminary Damage and Loss Assessment Yogyakarta and Central Java Natural Disaster,” Jakarta, 2006.

R. Cudmani, ”Soil Liquefaction: Mechanism and Assessment of Liquefaction Susceptibility,” in International Conference on Seismic Design of Industrial Facilities, 2013.

K. Kumar, Basic Geotechnical Earthquake Engineering. New Delhi: New Age International, 2008.

E. Soebowo, A. Tohari, and D. Sarah, ”Studi Potensi Likuifaksi di Daerah Zona Patahan Opak Patalan-Bantul, Jogjakarta,” in Proseding Seminar Geoteknologi Kontribusi Ilmu Kebumian Dalam Pembangunan Berkelanjutan, 2007, pp. 5565.

M. Jefferies and K. Been, Soil Liquefaction, A Critical State Approach. USA: Taylor Francis, 2006.

D. P. E. Putra, M. Iqbal, H. Hendrayana, and T. T. Putranto, ”Assessment of Optimum Yield of Groundwater Withdrawal in The Yogyakarta City, Indonesia,” J. SE Asian Appl. Geol, vol. 5, no. 1, pp. 4149, 2013.

Y. P. Kurniawan, ”Pengaruh Kondisi Hidrogeologi dan Sanitasi Lingkungan Terhadap Tingkat Kandungan Bakteri Coli Pada Air Tanah Dangkal Tahun 2012 di Kota Yogyakarta,” Universitas Gadjah Mada, 2014.

E. Soebowo, A. Tohari, and D. Sarah, ”Potensi Likuifaksi Akibat Gempabumi Berdasarkan Data CPT dan N-SPT di Daerah Patalan Bantul, Yogyakarta,” J. Ris. Geol. dan Pertamb., vol. 19, no. 2, pp. 8597, 2009, doi: 10.14203/risetgeotam2009.v19.25.

L. Z. Mase, ”Experimental Liquefaction Study of Southern Yogyakarta Using Shaking Table,” J. Tek. Sipil, vol. 24, no. 1, pp. 1118, 2017.

R. Kusumawardani, K. B. Suryolelono, B. Suhendro, and A. Rifai, ”Dynamic Behaviour of Yogyakartas sand Under Cyclic Triaxial Testing,” Int. J. Civ. Environ. Eng., vol. 12, no. 02, pp. 2328, 2013.

E. Hartantyo, K. S. Brotopuspito, Sismanto, and Waluyo, ”Predicting the Liquefaction Phenomena from Shear Velocity Profiling: Empirical Approach to 6.3 Mw, May 2006 Yogyakarta Earthquake,” in AIP Conference Proceedings, 2015, pp. 110.

Y. Nakamura, ”On the H/V Spectrum,” in The 14th World Conference on Earthquake Engineering, 2008, pp. 110.

K. Ishihara, Soil Behaviour in Earthquake Geotechnics. Great Britain: Clarendon Press, 1996.

Y. Nakamura, ”Seismic Vulnerability Indices For Ground and Structures Using Microtremor,” in World Congress on Railway Research, 1997, vol. 1, pp. 17.

Y. Fukushima, O. Kose, T. Yurur, P. Volant, E. Cushing, and R. Guillande, ”Attenuation Characteristics of Peak Ground Acceleration from Fault Trace of The 1999 Kocaeli ( Turkey ) Earthquake and Comparison of Spectral Acceleration with Seismic Design Code,” J. Seismol., vol. 6, pp. 379396, 2002.

SESAME, ”Guidelines for the Implementation of the H/V Spectral Ratio Technique on Ambient Vibrations Measurements, Processing, and Interpretation,” 2004.

S. L. Kramer, Geotechnical Earthquake Engineering. United State of America: Prentice-Hall, 1996.

M. Muzli et al., ”Pengukuran Vs30 Menggunakan Metode MASW Untuk Wilayah Yogyakarta,” J. Meteorol. dan Geofis., vol. 17, no. 1, pp. 2532, 2016, doi: 10.31172/jmg.v17i1.374.

Z. L. Kyaw, S. Pramumijoyo, S. Husein, T. F. Fathani, and J. Kiyono, ”Seismic Behaviors Estimation of the Shallow and Deep Soil Layers Using icrotremor Recording and EGF Technique in Yogyakarta City, Central Java Island,” Procedia Earth Planet. Sci., vol. 12, pp. 3146, 2015, doi:10.1016/j.proeps.2015.03.024




DOI: http://dx.doi.org/10.12962/j24604682.v17i3.9561

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.