TY - GEN
T1 - Debris flows produced by heavy rains on July 21, 2009 in Hofu City, Japan
AU - Nagano, Hiroyuki
AU - Hashimoto, Haruyuki
AU - Kuroda, Yoshiaki
AU - Takaoka, Hiroki
PY - 2011
Y1 - 2011
N2 - In this paper, we examine the debris flows which occurred in the mountain rivers in Hofu City, Japan on July 21, 2009. We estimate velocity and discharge of the debris flows in the rivers at Manao and Ishihara districts from field survey and numerical simulation. The numerical simulation indicates that the peak discharge is 181 m 3/s in the river at Manao district and 258 m 3/s in the river at Ishihara district. It is found that sediment yield volume by riverside erosion is larger than landslide sediment volume in the both rivers. Although the landslides triggered the debris flow initiation, they did not play the major role for the sediment outflow to the residential areas. The morphological characteristics of the river at Ishihara district increase debris flow discharge
AB - In this paper, we examine the debris flows which occurred in the mountain rivers in Hofu City, Japan on July 21, 2009. We estimate velocity and discharge of the debris flows in the rivers at Manao and Ishihara districts from field survey and numerical simulation. The numerical simulation indicates that the peak discharge is 181 m 3/s in the river at Manao district and 258 m 3/s in the river at Ishihara district. It is found that sediment yield volume by riverside erosion is larger than landslide sediment volume in the both rivers. Although the landslides triggered the debris flow initiation, they did not play the major role for the sediment outflow to the residential areas. The morphological characteristics of the river at Ishihara district increase debris flow discharge
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U2 - 10.4408/IJEGE.2011-03.B-079
DO - 10.4408/IJEGE.2011-03.B-079
M3 - Conference contribution
AN - SCOPUS:84861630859
SN - 9788895814469
T3 - International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings
SP - 725
EP - 733
BT - 5th International Conference on Debris-Flow Hazard Mitigation
T2 - 5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment
Y2 - 14 June 2011 through 17 June 2011
ER -