The Khangai mountain region is especially interesting for studying permafrost. To detect the unfrozen zone in the permafrost / talik /, we carried out 2D tomography of electrical resistance using the Syscal R1 + instrument. Six ERT profiles, 475 m long and 80 m deep, were used here. As a result of the interpretation of this study, we found several types of taliks in permafrost and we recommend choosing drilling sites for water supply along these profiles. It is best to use the ERT survey with other surveys such as excavation and drilling. There are several taliks by type and origin, such as closed talik, open talik, hydrothermal talik, isolated talik, lateral talik, etc. Open hydrothermal taliks are more suitable for water supply in rural areas of Mongolia.
