Abstract

Abstract The Pringgabaya subdistrict in East Lombok Regency frequently suffers from groundwater shortages, particularly during the dry season. This issue impacts the household and agricultural needs of the local community. This study aims to analyses aquifer volume based on lithology and aquifer type. Data were collected using the Schlumberger configuration geoelectric method. Measurements were taken at 28 sounding, 16 newly acquired sounding and 12 secondary data points ranging in length from 300 to 600 meters. Data processing was performed using IPI2WIN, Rockworks, Surfer, and QGIS software. Interpretation of the results shows that the lithology in the study area consists of soil, sand, gravel, clay, lava, and breccia. The identified aquifer types include semi-free and confined aquifers consisting of sand, gravel, and breccia. Groundwater potential mapping shows that the aquifer distribution is extensive, especially in the Easting coordinate range of 456626.31–465423.285 and the Northing coordinate range of 9050881.471–9064733.316 within the data collection area. The 3D modelling results show that the total volume of lithology with aquifer potential is approximately 1.04775 km 3 , equivalent to 5.8% of the total volume.

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