Hydrological estimation of fractures in the crystalline terrain by utilizing lineament extraction and natural -ray detection

Hanatani, Ikuo; Munakata, Masahiro ; Kimura, Hideo; Sanga, Tomoji*

In Japan Atomic Energy Agency, surveillance studies are currently underway with the aims of establishing the evaluation system of a groundwater flow for a regional scale over long periods and verifying a hydrologic groundwater flow model with survey data etc. As part of these studies, the lineament extraction and natural -ray detection were conducted in two granite distribution regions in order to estimate the distribution of fractures and the hydrogeological structure at the crystalline terrain in a mountain area deficient in the existing information such as a drilling investigation. This report describes the result of combinatorial utilization of lineament extraction and natural -ray detection.