Liquefaction in Palu: the cause of massive mudflows
Tóm tắt
The 7.5 Mw tectonic earthquake that hit Palu City on 28 September 2018 was followed by tsunami and liquefaction, triggered massive mudflows in Balaroa, Petobo, and Jono Oge areas. This study focuses on the generating factors of liquefaction such as the condition of soil lithology, depth of water table, the distance to the focal mechanism, and the thickness of soft sediment. Microtremor data, including the Horizontal Vertical Spectral Ratio (HVSR), geological condition, and borehole data, were examined to conduct the liquefaction analysis. The analysis results based on the microtremor data showed that the distribution of ground shear strain values in Palu City ranged from 0.75 × 10–4 to 2.56 × 10–4. The distribution of the locations of the liquefaction was correlated to the distribution of ground shear strain values. High ground shear strain values and a shallow groundwater level were discovered in Palu City valley, which indicates that liquefaction in Palu City will undoubtedly occur. The semi-empirical method confirmed that Balaroa, Petobo, and Jono Oge had undergone large-scale liquefaction at a maximum depth of 16 m below the ground level. The average peak of water runoff that generated the mudflow was estimated to be at 11.31 cm3/s. Since the soil has loose soil grain with high water content, the soil will turn into a massive amount of mud during the liquefaction.
Tài liệu tham khảo
Ambraseys NN (1988) Engineering seismology: part II. Earthq Eng Struct D 17(1):51–105. https://doi.org/10.1002/eqe.4290170102
Araujo W, Ledezma C (2020) Factors that affect liquefaction-induced lateral spreading in large subduction earthquakes. Appl Sci 10(18):1–21. https://doi.org/10.3390/app10186503
BMKG (2018) Study of seismic parameters in the Palu region and surrounding areas. Available online: https://docplayer.info /110191815–Kajian–parameter–kerentanan-seismik-wilayah-kota-palu-dan-sekitar-nya. Accessed on 4 April 2020 (in Indonesia)
Bradley K, Mallick R, Andikagumi H, Hubbard J, Meilianda E, Switzer A, Du N, Brocard G, Alfian D, Benazir FG, Yun SH, Majewski J, Wei S, Hill EM (2019) Earthquake-triggered 2018 Palu valley landslides enabled by wet rice cultivation. Nat Geosci 12(11):935–939. https://doi.org/10.1038/s41561-019-0444-1
Faris F, Fathani TF, Wang F (2019) Report on the UNESCO Chair workshop on geoenvironmental disaster reduction 28th April—1st may, 2019, Palu-Jakarta, Indonesia. Geoenviron Disasters 6(12):1–6. https://doi.org/10.1186/s40677-019-0129-5
Fathani TF, Legono D, Karnawati D (2017) A numerical model for the analysis of rapid landslide motion. Geotech Geol Eng 35(5):2253–2268. https://doi.org/10.1007/s10706-017-0241-9
Fear CE, Robertson PK (1995) Estimating the undrained strength of sand: a theoretical framework. Can Geotech J 32(5):859–870. https://doi.org/10.1139/t95-082
Geotechnical Control Office (1984) Geotechnical Manual for Slopes. 2nd Ed. Engineering Development Department Hongkong
Hazarika H, Rohit D, Pasha SMK, Maeda T, Irsyam M, Arsyad A, Nurdin S (2021) Large distance flow-slide at Jono-Oge due to the 2018 Sulawesi earthquake, Indonesia. Soils Found 61(1):239–255. https://doi.org/10.1016/j.sandf.2020.10.007
Idriss IM, Boulanger RW (2008) Soil liquefaction during earthquakes. MNO-12, EERI Publications, United Stated of America, Earthquake. Engineering Research Institute, 2008, 1–264
Irsyam M, Hanifa NR, Djarwadi D, Sarsito DA, Widiyantoro S, Natawidjaja D, Meilano I, Rudyanto A, Hidayati S, Triyoso W, Faizal L, Sunarjito (2019) The seismic source and hazard map of Indonesia 2018 National Center for Earthquake Study (PUSGEN)
Ishihara K (1996) Soil behaviour in earthquake geotechnics. Oxford Engineering Science Series 45. Oxford University Press, Oxford
Ishihara K (2019) Flow and lateral spreads of liquefied ground following earthquakes. International conference on landslides and slope stability, Sept. 26–28, 2019, Bali, Indonesia
Iwasaki T, Tokida K, Tatsuoka F (1981) Soil liquefaction potential evaluation with use of the simplified procedure. In: Proceedings of the first international conference on recent advances in Geotechnical Earthquake Engineering and Soil Dynamic, April 26 – May 3, St. Louis, Missouri
Jalil A, Fathani TF, Satyarno I, Wilopo W (2020) A study on the liquefaction potential in Banda Aceh City after the 2004 Sumatera earthquake. Int J GEOMATE 18(65):147–155. https://doi.org/10.21660/2020.65.94557
JICA (2019) Project report, the project for development of regional disaster risk resilience plan in Central Sulawesi
Keefer DK (1994) The importance of earthquake-induced landslides to long-term slope erosion and slope-failure hazards in seismically active regions. Geomorphology 10(1–4):265–284. https://doi.org/10.1016/0169-555X(94)90021-3
Li XS, Ming HY (2000) Unified modeling of flow liquefaction and cyclic mobility. Soil Dyn Earthq Eng 19(5):363–369. https://doi.org/10.1016/S0267-7261(00)00022-1
Liu JG, Mason PJ (2009) Essential image processing and GIS for remotes sensing. Wiley-BlackWell, London
Mase LZ, Likitlersuang S, Tobita T (2020) Verification of liquefaction potential during the strong earthquake at the border of Thailand Myanmar. J Earthq Eng. https://doi.org/10.1080/13632469.2020.1751346
Mason H B, Gallant A, Hutabarat D, Montgomery J, Reed A N, Wartman J, Irsyam M, Prakoso W, Djarwadi D, Harnanto D, Alatas I, Rahardjo P, Simatupang P, Kawanda A, Hanifa R (2019) The 28 September 2018 M7.5 Palu-Donggala, Indonesia earthquake: Version 1.0 geotechnical extreme events reconnaissance association report GEER-061. https://doi.org/10.18118/g63376
Meixler E (2018) How liquefaction made flow like wave in Indonesia’s earthquake disaster. TIME https://time.com/5413507/liquefaction-indonesia-earthquake-damage. Accessed on 23 September 2020
Miyajima M, Setiawan H, Yoshida M, Ono Y, Kosa K, Oktaviana I S (2019) Geotechnical damage in the 2018 Sulawesi earthquake, Indonesia. Geoenviron Disasters 6(6):1–8. 10/1186/s40677-019-0121-0
Naing M T, Fathani T F, Wilopo W (2018) Estimating the velocity of landslide movement using visco-plastic model in Jeruk Sub-village, Kulon Progo District, Yogyakarta, Indonesia. JCEF 4(3): 276–282. https://doi.org/10.22146/jcef.35097
Nakamura Y (1989) A Method for dynamic characteristics estimation of subsurface using microtremor on the ground surface. Q Report Railway Tech Res Inst 30(1):25–33
Nakamura Y (1997) Seismic vulnerability indices for ground and structures using microtremor. World Congress on Railway Research in Florence, Italy
Nakamura Y (2000) Clear identification of fundamental idea of Nakamura’s technique and its applications. In: Proceedings of the 12th world conference on earthquake engineering, New Zealand, Paper No. 2656
Olson SM, Stark TD (2003) Yield strength ratio and liquefaction analysis of slopes and embankments. J Geotech Geoenvironmental Eng 129(8):727–737. https://doi.org/10.1061/(ASCE)1090-0241(2003)129:8(727)
Robertson PK (2010) Evaluation of flow liquefaction and liquefied strength using the cone penetration test. J Geotech Geoenviron Eng 136(6):842–853. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000286
Robertson I, Mulchandani H K, Achiari H, Esteban M, Mikami T, Nakamura R, Shibayama T, Stolle J, Takabatake (2019) Palu earthquake and tsunami, Sulawesi, Indonesia: Field Assessment Team 1 (FAT-1) Early Access Reconnaisssance Report (EARR). NHERI DesignSafe Project ID: PRJ-2128. https://doi.org/10.17603/DS2XD5S
Sadly M (2018) Gempa Tektonik M=7,7 Kabupaten Donggala, Sulawesi Tengah pada Jumat 28 September 2018, Berpotensi Tsunami. BMKG. https://www.bmkg.go.id/press-release/?p= gempabumi-tektonik-m7–7-kabupaten-donggala-sulawesi-tengah-pada-hari-jumat-28-september-2018-berpotensi-tsunami&tag. Accessed on 22 January 2020 (in Indonesia)
Sato T, Nakamura Y, Saita J (2008) The change of the dynamic characteristics using microtremor. In: Proceedings of the World Conference on Earthquake Engineering. Beijing, China
SESAME (2004) Guidelines for the implementation of the H/V spectral ratio technique on ambient vibrations measurements, processing and interpretation. SESAME European Research Project WP12,deliverableno.D23.12. http://sesame-fp5.obs.ujf-grenoble.fr/Delivrables/Del-D23-HV_User_Guidelines.pdf. Accessed on 28 march 2020
SNI 03-1726-2019 (2019) Earthquake resistance planning ordinance for building structures and non-building. national standardization agency of Indonesia (in Indonesia)
Socquet A, Hollingsworth J, Pathier E, Bouchon M (2019) Evidence of supershear during the 2018 magnitude 7.5 Palu earthquake from space geodesy. Nat Geosci 12:192–199. https://doi.org/10.1038/s41561-018-0296-0
Sukamto R (1973) Reconnaissance geological map of Palu area, Sulawesi. Scale 1:250.000. Geological Survey of Indonesia, Bandung, Indonesia
Syah A, Fathani TF, Faris F (2019) A Numerical analysis of landslide movements considering the erosion and deposition along the flow path. JCEF 5(3): 187–200. https://doi.org/10.22146/jcef.43808
Thein PS, Pramumijoyo S, Brotopuspito KS, Kiyono J, Wilopo W, Furukawa A, Setianto A (2014) Estimation of seismic ground motion and shaking parameters based on microtremor measurements at Palu City, Central Sulawesi Province, Indonesia. World Acad Sci Eng Technol Int J Geol Environ Eng 8:308–319. https://doi.org/10.5281/zenodo.1092938
Thien PS (2015) Analysis of strong ground motion based on microtremors, boreholes and trench data in Palu City, Central Sulawesi Province, Indonesia. Dissertation, Universitas Gadjah Mada
Valkaniotis S, Ganas A, Tsironi V, Barberopoulou A (2018) A preliminary report on the M7.5 Palu earthquake co-seismic ruptures and landslides using image correlation techniques on optical satellite data. Zenodo. https://doi.org/10.5281/zenodo.1467128
Widyaningrum R (2012) Indonesian Geological Agency, Geological investigation of potential liquefaction Engineering in Palu Central Sulawesi Province: Ministry of Energy and Mineral Resources, Geological Agency. Rep. No: 297/LAP-BGE.P2K/2012 (in Indonesia)