Potential Study of Liquefaction in the Downstream Area of Jono Oge-Paneki River, Central Sulawesi

Widyatmoko, Aditya; Legono, Djoko; Hardiyatmo, Hary Christady

doi:10.1088/1755-1315/930/1/012084

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…This liquefaction potential analysis used the simplified procedure by Idriss-Boulanger [23] according to 8 SPT boreholes. It procedure has also been applied in Jono Oge-Paneki River [24], Gumbasa Irrigation Area [25] dan Bangga River [26] for liquefaction potential. The second is to determine the Liquefaction Severity Index (LSI).…”

Section: Figure 1 Study Site In Loh Buaya Rinca Island Indonesiamentioning

confidence: 99%

Liquefaction potential analysis based on standard penetration test in coastal area (Case study: Loh Buaya, Rinca Island, Indonesia)

Rakhman,

Ismanti,

Aditya

2024

IOP Conf. Ser.: Earth Environ. Sci.

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An area has liquefaction potential when it has a shallow groundwater level, loose sandy soil, and is prone to earthquakes. There are several areas with such criteria that have not been analysed for liquefaction potential. This study aims to analyse and plot the liquefaction potential in the coastal area of Loh Buaya, Rinca Island, East Nusa Tenggara Province. Soil investigation data, such as SPT, sieve analysis, and groundwater level, as well as earthquake history that occurred from 1922-2022, served as the main data for liquefaction potential analyses. The methods used were Ground Motion Equation Prediction (GMPE) to calculate Peak Ground Acceleration (PGA), Simplified Procedure, and Liquefaction Severity Index (LSI) to make a liquefaction hazard assessment. LSI scores were used to provide micro-zonation of liquefaction potential with Inverse Distance Weighted (IDW) interpolation in QGIS. The result obtained is very dense gravel has no liquefaction potential whereas loose sandy soil has very high in LSI classification because loose sandy soil has liquefaction potential up to 20 meters of depth. The applying of micro-zonation LSI by IDW interpolation method can estimate the potential level of liquefaction hazard on Loh Buaya, Rinca Island with limited soil investigation data.

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Section: Figure 1 Study Site In Loh Buaya Rinca Island Indonesiamentioning

confidence: 99%

Liquefaction potential analysis based on standard penetration test in coastal area (Case study: Loh Buaya, Rinca Island, Indonesia)

Rakhman,

Ismanti,

Aditya

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The Liquefaction Potential Index (LPI) consists of five liquefaction potential levels with 0 to 20 m depth (Table 2) [15][16][17].…”

Section: Liquefaction Potential Index (Lpi)mentioning

confidence: 99%

Liquefaction potential in the governor's office of West Sulawesi after the 2021 Mamuju-Majene earthquake

Satilah,

Hardiyatmo,

Satyarno

2023

E3S Web Conf.

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The Governor's Office of West Sulawesi Province is close to an active fault, which triggers its vulnerability to seismic activity. The Mamuju Majene Earthquake destroyed the Governor's office building with a magnitude of Mw 6.2 in 2021. The geological conditions at the site are alluvial deposit formations. In addition to the geotechnical conditions, it has the characteristics of sandy soil with fine to medium gradations. Liquefaction causes a loss of soil strength and an increased pore water pressure caused by vibrations on the earth's surface in the form of seismic waves. It causes a decrease in effective stress, ground settlement, and lateral spreading. This study aims to determine the potential for liquefaction in The Governor's Office of West Sulawesi using a simplified procedure method with a Standard Penetration Test (SPT). The Peak Ground Acceleration (PGA) value is determined using the RSA Human Settlements. The Liquefaction Potential Index (LPI) produces five zones of liquefaction potential levels. The analysis showed that The Governor's Office of West Sulawesi experienced liquefaction at a depth of 12-18 meters with a moderate to very high level.

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“…One of the effects of earthquakes is liquefaction [1], in which saturated sandy soils can become liquid because of increased pore water pressure (PWP) caused by strong shaking. This increase can also reduce the strength and stiffness of the soil, causing it to lose its bearing capacity [2].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Liquefaction Risk With Unidentified Seismic Parameters for Newly-Discovered Faults: Numerical Analysis

2024

GEOMATE

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Earthquakes can trigger liquefaction, which can cause soil to lose its strength and stability. Ambon City is vulnerable to large earthquakes owing to tectonic movements. Therefore, accurate analyses are required to assess the seismic hazards and liquefaction potential. This study aims to determine the hazard spectrum and artificial earthquakes to estimate liquefaction potential through numerical analysis. This study conducts a comprehensive analysis to accurately investigate liquefaction potential using deterministic seismic analysis based on new faults and nonlinear analysis with a two-dimensional finite element approach. The results of this study show that nonlinear analysis can effectively account for the increase in pore water pressure (PWP) during earthquake shaking, thus providing more detailed information on the changes in effective stress and PWP in different soil layers. The effective stress did not decrease in the unsaturated soil layers. However, in the saturated soil layers, the effective stress decreased as PWP increased during the shaking period. Liquefaction potential was predicted before the earthquake in soils with N-SPT <15 and continued to increase in all soil layers until the end of the shaking period. This study also showed the behavior of soils that experienced significant amplification. The peak ground acceleration in the bedrock increased from 0.408 to 0.952 g at the surface. The amplification factor is 2.33, indicating that the soil at the site is susceptible to highamplitude earthquakes. The results of this study indicate that areas near faults are vulnerable to seismic hazards and susceptible to liquefaction in all the soil layers. The results indicated the need to implement effective and efficient mitigation strategies for infrastructure planning and development in these areas.

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Potential Study of Liquefaction in the Downstream Area of Jono Oge-Paneki River, Central Sulawesi

Cited by 8 publications

References 12 publications

Liquefaction potential analysis based on standard penetration test in coastal area (Case study: Loh Buaya, Rinca Island, Indonesia)

Liquefaction potential analysis based on standard penetration test in coastal area (Case study: Loh Buaya, Rinca Island, Indonesia)

Liquefaction potential in the governor's office of West Sulawesi after the 2021 Mamuju-Majene earthquake

Assessment of Liquefaction Risk With Unidentified Seismic Parameters for Newly-Discovered Faults: Numerical Analysis

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