Paper

Rainstorm control of scale and type of debris flows at Kamikamihorizawa Creek of Mount Yakedake, Japan

Kazuyuki OKANO, Hiroshi SUWA and Tadahiro KANNO　3

Construction of simplified cybernetics model for evacuation behaviors in sediment disaster　-　The case study of three cities in Nagano prefecture　-

Takeru KINOSHITA, Reiko AKIYAMA, Yoshikazu SHIMIZU and Nobutomo OSANAI　　11

Study on channel experiment of bedload measurement using radar

Teruyoshi TAKAHARA, Kazuki MATSUMURA and Jun‐ichiro TAKAHAMA　　22

The effect of root system in cool‐temperate deciduous broad‐leaved forest on the slope stability

Hajime SATO, Ken‐ichi OTANI, Takayoshi KANBARA and Hiroyuki TORITA　　29

Technical Report

Analysis for early warning of sediment‐related disaster in Mt. Bawakaraeng Caldera, South Sulawesi, Indonesia
　　　HASNAWIR and Tetsuya KUBOTA　　38

Research Notes

Study about deformation of stream bed deposit at initiation zone of debris flow
　　　Akihiko IKEDA, Takahisa MIZUYAMA, Nobuo SUGIURA and Yuji HASEGAWA　46

Evaluation of the effect on Bili‐bili Dam in Indonesia as a sabo dam by numerical simulations
　　　Yusuke YAMAZAKI, Laurentia DHANIO, Takahisa MIZUYAMA and Yoshifumi SATOFUKA　52

Technical Notes

Outline of early warning system based on the probable precipitation analysis method for the sediment‐related disasters
　　　Nobutomo OSANAI, Shinichi KOJIMA and Kazumasa KURAMOTO　56

Prompt Report

The composite hazard resulted from Typhoon Morakot in Taiwan
　　　Chjeng‐Lun Shieh・Chun‐Ming Wang・Wen‐Chi Lai・Yun‐Chung Tsang・Shin‐Ping Lee　61