Analysis of groundwater potential zones using Dar-Zarrouk parameters in Pangkalpinang city, Indonesia

Pangkalpinang city is the capital of the Bangka Belitung Islands Province, Indonesia. With the increase in population and the economy in the Pangkalpinang city, water resources' need also increases. This study aimed to analyze potential groundwater areas to ensure the availability of water for this city using Dar-Zarrouk Parameters. Vertical Electrical Sounding (VES) measurements have been conducted at eight points around the city of Pangkalpinang using the Schlumberger array configuration. Dar-Zarrouk parameter was calculated using two parameters of the geoelectric inversion results, i.e., resistivity and layer thickness. The IPI2Win inversion results show that the resistivity value ranges from 96 to 1988 Omega m and layer thickness varies from 2 to 135 m. Longitudinal conductance values vary from 0.097 to 0.307 mS. Transverse resistance value varies from 25,711.46 to 84,695.3 Omega m(2), and anisotropic coefficient value ranges from 1.03 to 1.31. Based on these value, northern part of the study area has higher groundwater potential zone than southern part of the study area.