Paper

Statistical bed load analysis of small‐scale floods based on hydrophone observation

Hiroaki NAKAYA　　4

Erosion and sediment outflow from devastated basin where hillside works has been implemented and influence on the downstream river

Yuji YASUDA, Takahisa MIZUYAMA, Masaru TOUHEI and Touru TANIGUCHI　　12

Flow and sedimentation process of 1926 volcanic mudflow based on the field investigation data analysis, at Mt. Tokachi

Tomoyuki NANRI, Hiroshi FUKUMA, Norikuni HARADA, Hiroshi ANDO,Hideyuki ITOH, Toshihiro HASHINOKI and Takashi YAMADA　　21

Research Notes

Investigation on collapsed soil movement in disastrous slope failures
　　　Yoshiiku MUSASHI and Takahisa MIZUYAMA　31

Basic Experimental about detection of particle by radar
　　　Teruyoshi TAKAHARA, Kazuki MATSUMURA and Iwao MIYOSHI　37

Technical Notes

Development of the steel structure for controlling debris flow
　　　Masaaki WATARI, Kouji GOTO, Syun‐ichiro KASAI and Mitsunori KATO　42

Relationship between the distribution of slope failures and seismic intensity.
　　　Hideyuki ITOH, Nobutomo OSANAI, Haruo NISHIMOTO, Nobuhiro USUKI and Osamu SAGUCHI　46