Groundwater exploration using self potential and resistivity geoelectrical method as drought disaster mitigation at bukit intan sub-district, Pangkalpinang

Abstract Pangkalpinang City in Bangka Belitung Islands province faces a seasonal water crisis due to its location outside the island’s groundwater basin. This study focuses on assessing groundwater potential in the Bukit Intan sub-district to support drought mitigation efforts. Using a combination of self-potential (SP) and geoelectrical resistivity methods, groundwater flow and aquifer depth were analyzed. Field data were collected across multiple tracks, with SP measurements revealing areas of potential groundwater movement, while resistivity profiles indicated aquifer presence at depths of 3-30 meters. Results suggest that groundwater potential is concentrated in certain recharge zones, highlighting areas suitable for targeted extraction and the establishment of boreholes. These aquifers exhibit seasonal fluctuations in groundwater levels, whereas the confined zones are located at greater depths and are more isolated, likely due to the presence of resistive layers that restrict flow. This assessment provides crucial insights for improving groundwater management in drought-affected regions of Pangkalpinang City.