Papers

　Temporal and spatial variations in the probability of debris flow initiation in volcanic watersheds
　　　Muhammad MUKHLISIN, Ken'ichirou KOSUGI and Takahisa MIZUYAMA　　3
　Hydraulic characteristics and natatorial action of fish around boulders
　　　Masatoshi MIYAZONO, Tsugumi TAKAUJI and Osamu TOMATSU　15
　Study of recent changes in landuse and stream course with reference to geomorphologic characteristics in the Siwalik Hills of Nepal
　　　Sohan Kumar GHIMIRE and Daisuke HIGAKI　25

Technical Reports

　Sediment related disasters in summer rainy season 2004 in Taiwan（prompt report）
　　　Setsuo HAYASHI, Kanji KONDO, Shinya NUMAMOTO, Hiroshi KAWABE and Yutaka GONDA　32
　The sediment‐related disasters caused by the mid Niigata prefecture earthquake in 2004 （prompt report）
　　　Hiroshi KAWABE, Yutaka GONDA, Hideaki MARUI, Naoki WATANABE, Satoshi TSUCHIYA,
　　　Hikaru KITAHARA, Nobutomo OSANAI, Katsuo SASAHARA, Yoshimitsu NAKAMURA,　　
　　　Kimio INOUE, Kiichiro OGAWA and Satoshi ONODA　39

Research Note

　Investigation on the distribution of long travelling landslides
　　 Nobuhiro USUKI, Yoshinari TANAKA and Takahisa MIZUYAMA　47
　An observation of spatial pore water pattern in a mountain hollow
　　 Yuki NISHIGUCHI, Taro UCHIDA, Takahisa MIZUYAMA and Ken'ichirou KOSUGI　53
　Auto‐detect system for slope failures area with aerial photograph
　　 Kazuki MATSUMURA　59
　Effects of the difference of volcanic activity on erosion rate by sheet erosion in Sakurajima volcano
　　 Yukiyoshi TERAMOTO, Etsuro SHIMOKAWA and Takashi JITOUSONO　65