*Hidenobu Takahashi¹, Haruo Kimura¹, Yasuhira Aoyagi¹, Motoshi Tomura², Katsuya Noda² (1.Central Research Institute of Electric Power Industry, 2.Geosys Inc.)

*Shozo Kawashima¹, Haruo Kimura², Kaoru Taniguchi³, Toshimichi Nakanishi⁴, Hiroyuki Tsutsumi⁵ (1.Division of Science of Environment and Mathematical Modeling, Graduate School of Science and Engineering, Doshisha University, 2.Central Research Institute of Electric Power Industry, 3.Pasco Corporation, 4.Museum of Natural and Environmental History, Shizuoka, 5.Department of Environmental Systems Science, Faculty of Science and Engineering, Doshisha University)