TY - JOUR
T1 - Estimating the effects of heavy rainfall conditions on shallow landslides using a distributed landslide conceptual model
AU - Shuin, Yasuhiro
AU - Hotta, Norifumi
AU - Suzuki, Masakazu
AU - Ogawa, Ki ichiro
N1 - Funding Information:
This research was partly supported by the Ministry of Education, Culture, Sports, Science and Technology, Japan; a Grant-in-Aid for Scientific Research (C) No. 19580161; and the SABO Technical Center, Japan.
PY - 2012
Y1 - 2012
N2 - This study used a distributed landslide conceptual model to examine the effects of variable, heavy-rainfall conditions on shallow landslides. A digital terrain model with 50-m resolution was used to calculate the regional potential for shallow landslides based on the distribution of shallow infiltration water, Darcy's law, and a safety factor estimated by infinite slope stability analysis. The model was applied to the upper Miyagawa River basin at Odai-cho in Mie Prefecture, Japan. In 2004, Typhoon Meari caused severe landslides in areas adjacent to the study area, whereas other heavy-rainfall events in the same year did not cause severe landslides. Response analysis of data collected hourly during heavy-rainfall events revealed that temporal changes in shallow landslide potentials were influenced by both temporal rainfall patterns and effective soil cohesion. Two indices obtained from the model were found to be useful for discriminating between rainstorms with and without sediment-related disasters.
AB - This study used a distributed landslide conceptual model to examine the effects of variable, heavy-rainfall conditions on shallow landslides. A digital terrain model with 50-m resolution was used to calculate the regional potential for shallow landslides based on the distribution of shallow infiltration water, Darcy's law, and a safety factor estimated by infinite slope stability analysis. The model was applied to the upper Miyagawa River basin at Odai-cho in Mie Prefecture, Japan. In 2004, Typhoon Meari caused severe landslides in areas adjacent to the study area, whereas other heavy-rainfall events in the same year did not cause severe landslides. Response analysis of data collected hourly during heavy-rainfall events revealed that temporal changes in shallow landslide potentials were influenced by both temporal rainfall patterns and effective soil cohesion. Two indices obtained from the model were found to be useful for discriminating between rainstorms with and without sediment-related disasters.
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U2 - 10.1016/j.pce.2011.06.002
DO - 10.1016/j.pce.2011.06.002
M3 - Article
AN - SCOPUS:84865424634
SN - 1474-7065
VL - 49
SP - 44
EP - 51
JO - Physics and Chemistry of the Earth
JF - Physics and Chemistry of the Earth
ER -