Paper

Debris disasters caused by heavy rainfall around Hofu City in Yamaguchi Prefecture on July 21, 2009

Osamu SHIMIZU　3

Numerical simulation method of debris flow introducing the non‐entrainment erosion rate equation,at the transition point of the riverbed gradient or the channel width and in the area of sabo dam

Takuro SUZUKI, Norifumi HOTTA and Kuniaki MIYAMOTO　　14

Technical Report

Overtopping erosion of landslide dam at Numakura‐urasawa, San‐hazama river Miyagi Prefecture, Japan.
　　　Taro UCHIDA, Akira MATSUOKA, Naoki MATSUMOTO, Josui MATSUDA,　　
Koichi AKIYAMA, Keiji TAMURA and Kinya ICHINOHE　23

Observation of changes in subsurface flows from cross‐section of torrent bed material produced for Sabo dam construction and overland flow generation
　　　Takashi YAMADA, Kenji MORI, Shinya NUMAMOTO and Setsuo HAYASHI　30

Preliminary study on the effect of rainfall characteristics and soil strength on the potential for shallow landslides using a simplified physically based model-A case study for Miyagawa upper river basin in Mie prefecture-
　　　Yasuhiro SHUIN, Masakazu SUZUKI, Norifumi HOTTA, Toshiaki TASAKA and Kiichiro OGAWA　39

Research Notes

Study of damage index based on a questionnaire survey of the image of damage caused by sediment disasters
　　　Shinichi KOJIMA, Nobutomo OSANAI, Haruo NISHIMOTO, Kiichiro OGAWA and Masayuki MATSUDA　47

Technical Notes

Debris flow control structures installed in zero‐order torrents―a debris flow fence―
　　　A study on evacuation factors from sediment‐related disastersMasayuki MIYASE and Toshihiro KIKUI　55