1969 年 10 巻 2 号 p. 52-58
(1) Piestic water of Daisen Volcano is recognized in Nawa Mud Flow and in Mikuriya Conglomerare. It looks like promising that Mizoguchi Tuff Breccia contains a pretty deal of ground-water.
(2) Several springs are in (i) the Older Andesite (fissure water), (ii) Mikuriya Conglomerate and Nawa Mud Flow, and (iii) debris. The yield coming out of (i) is the greatest of all. Both produces of (ii) and (iii) are free surface water in nature.
(3) This paper deals with two ground-water areas. One is, in the south of this district, a ground-water basin; another is, in the north, a underground valley which runs in the west. The latter is smaller than the former in the ground-water storage.