Prediction of changes in the phreatic level using a hydrogeological approach in post liquefaction disasters at the Petobo area Palu groundwater Basin Central Sulawesi Province

Zeffitni, Zeffitni

doi:10.1063/5.0133258

Cited by 1 publication

(2 citation statements)

References 16 publications

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“…Furthermore, from Table 2 and Figure 9, it can be seen the distribution of phreatic values before and after liquefaction occurred [5]. Phreatic changes follow the topography with flow towards the alluvial plains of the Palu Valley.…”

Section: Hydrogeological Petobo Areamentioning

confidence: 91%

“…Groundwater potential can be determined based on the characteristics of groundwater in hydromorphological units and hydrogeological units [4]. Landform units as a determining factor for hydromorphological conditions will generally affect the distribution of groundwater [5]. Lithological differences as a determining factor for hydrogeological conditions will affect the availability of groundwater.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydromorphological and Hydrogeological Assessment of Liquefaction Vulnerability in Central Sulawesi, Indonesia

Zeffitni,

Rusdin,

Napitupulu

et al. 2023

IJDNE

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The earthquake disaster that struck the regions of Palu, Sigi, and Donggala on September 28, 2018, instigated liquefaction in Petobo and its surrounding areas. This study employs a hydrogeological approach, supplemented by geospatial analysis, to comprehensively evaluate the vulnerability to liquefaction in these regions, focusing specifically on hydromorphological and hydrogeological parameters such as phreatic and aquifer characteristics. Data were collected from 25 randomly selected observational dug wells in the Petobo area and its surroundings, and the analysis was facilitated by the Arc View Gis 3.3 program and satellite imagery. Based on the measurement results in 25 observation dug wells, the depth of the phreatic level was found to be shallow, at 2.25 meters from the ground surface, and its fluctuations were low, at 0.67 meters. The permeability was relatively high, averaging 49.18 meters/day. The regions experienced liquefaction avalanches in areas with a slope of less than 4%, which led to an increase in groundwater flow velocity and an elevation in the phreatic level between 2.0 and 2.5 meters. Hydrogeologically, these areas are located within the Alluvium and Pakuli formations, characterized by sand, clay, sand-clay, sand-gravel, and schist lithologies. In conclusion, the study reveals that Petobo and its surrounding areas exhibit a high vulnerability to liquefaction, ascribed to the shallow phreatic levels and high aquifer parameters observed in the alluvial plains. These findings underscore the need for careful consideration of these factors in future planning and disaster mitigation strategies in regions with similar geological and hydrogeological characteristics.

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Section: Hydrogeological Petobo Areamentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%