Groundwater Potential Modelling in Central Lampung Using Resistivity Meter Method (Geoelectric Method) (Case Studi in Bumi Ratu Nuban District Central Lampung)

Water plays a central and critical role in the life of every living creature. Thus, the presence of the groundwater should be administered properly both in its quality and quantity to fulfill the human demand. Groundwater consuming tends to increase along with the population growth rate, therefore planning and wise groundwater consuming is required to preserve and protect the water resources in the District of Bumi Ratu Nuban Central Lampung regency. The groundwater research was conducted using Geoelectric tool with Schlumberger configuration. This study is aimed to determine groundwater movement pattern, describe recharge and discharge groundwater zone to govern groundwater conservation. But, the main points carried out in this research are to know the layer type of rock and the presence of groundwater aquifers using the Geoelectric tool Schlumberger configuration and to conduct the modeling using Ip2Win software in Bumi Ratu Nuban district areas; Bumi Rahrjo, Bumi Rahayu and Tulung Kakan with the measurement in 13 spots. Schlumberger configuration was used in this research due to its accuracy to measure under surface conditions vertically based on the resistivity value of rocks. The study reveals that resistivity value of rocks in Bumi Ratu Nuban districts is dominated by the value between 100 -5000 Ωm. It can be assumed that thick layers of rock in this area are sand and gravel aquifers. The aquifer in this area is phreatic aquifer with the thickness of at least 3.53 m and maximum of 74.95 m. The good potential aquifier was found in Tulung Kakan and Bumi Raharjo villages. The rock layers dominated in the study area are clay, sand, sand argillaceous and sandy loam.