The Effect of Various Peak Ground Acceleration Level in Petobo Irrigation Canal Area Post 2018’s Liquefaction Disaster

The soil liquefaction disaster in Petobo, Central Sulawesi, caused massive terrain damage. With a total displacement of up to 800 meters and sliding area 1.43 km 2 , the structure was deformed. 7.5 Mw earthquake with maximum PGA 0.45 causing flow-induced distance from crown foot landslide as far km. research aims find out how well post-earthquake can withstand potential if it is hit by various levels. This will conduct several simulations determine performance against earthquakes. empirical calculation method carried referring Idris-Boulanger safety factor. Based on scenarios that have been out, land be re-liquefy when shaken an certain level below magnitude 2018’s Palu earthquake. There are six different earthquakes PGA. soils still possibility liquefy 0.20 considered safe value 0.13. Mitigation efforts, including remediation, must before reconstructing phase Petobo irrigation canal starts.