Study of Groundwater Pathway in the Shallow Bedrock Area using Very Low Frequency Method

Abstract

Abstract In the hard rock and thick forest area, the use of active geophysical method for groundwater exploration is relatively difficult. In this study, very low frequency survey method has been successfully used to explore the possibility of the groundwater pathway in the hard rock area. The very low frequency method used T-VLF with the reding stations of 2 m and 5 m. The data then processed using inhouse software. As the results, the VLF model shows the conductive zones at several sites that are observed at the depth of less than 10 m. These conductive zones are indicating as the zone of water pathway. The study area is dominated by the non-conductive zone which is indicating that there is no possibility of water pathway. Generally, the water pathway has been found between the hot spring and small lake at the southeast of the study area.