dethod of Investigating Groundwater-vein Streams by Measuring One-meter-depth Temperature in Landslide Areas Part 2: Examples of Measurement of One-meter-depth Underground Temperature@@@1m深地温測定調査の実施例

In order to detect groundwater distributed nonuniformly over a landslide area, methods utilizing mechanical or electrical properties of soil and water have been applied up to now. However, groundwater by these techniques can be either that having a direct influence on the landslide activity or that having little influence on it, and therefore, prevention works undertaken on the basis of the obtained results have been very often unsatisfactory. The author has come to the view that the utilization of thermal properties of water and soil, to which little attention has been paid so far, will make it possible to detect groundwater-vein stream having a significant influence on the landslide activity, and has pursued theoretically the applicability of exploring the vein by measuring one-meter-depth underground temperature (Takeuci, 1980). As a result of the investigation, it revealed that this method is an effective method of determining the location of groundwater in the formed vein stream. Thus, the method was applied successfully to the following landslide areas: Niigata pref. : Matsunoyama (1964-1975), Aburuma (1979), and Maekawa (1979) Yamanashi Pref. : Aikawa (1977) Shizuoka Pref. : Kuzureno (1977) Gifu Pref. : Yamagami (1968) Ishikawa Pref. : Fujio (1975), Nawamata (1976-1979), Kanayama (1976), Ohtsuburi (1976), Minazuki (1977), Sakuratoge (1977), Higashinakao (1978), Matsunagi (1978-1979), Soryo (1978), Fujinose (1978), Yuridani (1978), and Tamura (1979) Shiga Pref. : Kamiohgi (1965), Kushibayashi (1967), and Ushigatani (1978-1979) Osaka Pref. : Kamenose (1965) Wakayama Pref. : Hashimoto (1978) Hyogo Pref. : Gotenyama (1964-1965), Mikage (1965), Temjin (1967), Miyagami (1973-1976), Marumi (1978-1979), Yagi (1978-1979), Yamamoto (1979), and Kusu (1979)