Natural disasters such as earthquake, tsunami and liquefaction in Central Sulawesi Province in 2018 had a significant impact on economic growth. This demands disaster risk reduction, especially liquefaction disasters. This research was conducted in Tindaki Groundwater Basin, Parigi Moutong Regency, especially in Parigi sub-district, which includes: Lebo, Bambalemo, Kampal, Maesa, Bantaya, and Olaya. The purpose of this study was to determine the level of risk of liquefaction based on the spatial distribution of the unconfined aquifer in Tindaki Groundwater Basin. The number of samples is 100 points taken randomly, consisting of community dug wells to obtain phreatic depth. The technique of collecting data is random and proportional sampling.The method used in this study is geological and hydrogeological approaches with rock formation as a determining parameter for groundwater density. The results showed that the average depth of the phreatic level was <10 meters from the ground and was in the alluvium formation. Based on the results of the study, it can be concluded that the potential for liquefaction in the research area is in the medium to high potency.

One of the government’s efforts towards post-disaster reconstruction in 2018 at Central Sulawesi, especially in Palu City, is to build a Phase IA Duyu Permanent Occupancy. This study aims to determine the potential for confine aquifer based on the aquifer characteristics for freshwater—analysis of aquifer characteristics based on survey results, pumping test data, and hydrochemical parameters. The results showed that the quantitative potential of confine aquifer based on SD-DTW-DY well data was in the medium to high potential class in the Pz3.D0.T0.Qs0.Q0.M1 units, with the distribution of aquifer characteristic values: permeability (K) 53.09 m/day, the piezometric depth is 12.15 m from ground level, the aquifer thickness is 76.32 m, and debit (Q) is 9.50 l/second. Spatially the distribution of aquifers in denudational hills and alluvial plains at the Pakuli Formation with SND-GRV and GRA-DIO lithology. The results of the hydrochemical quality are good quality classes, include: TDS 182.0 mg/l, pH 8.3, Fe 0.00 mg/l, Mn 0.00 mg/l, Cl 11.70 mg /l, SO4 12.90 mg/l, NO3 0.00 mg/l, and NO2 0.18 mg/l. Based on the results of the data analysis, the characteristics of the aquifer in the Duyu permanent occupancy area are classified as medium productive aquifers.