m l 7.3 m w 7.6. 11/11/20152 chi-chi epicenter landslides
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ML 7.3MW 7.6
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Chi-Chi epicenter
Landslides
Jiufengershan landslideJiufengershan landslide
Geological contextGeological context
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Geological SectionGeological Section
1.5 km × 40~60mElevation difference: ~ 500mDip angle: 20°
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Monocline ?Monocline ?
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Cut-and-fill volumeCut-and-fill volume
Cut: 42.1 x 106 m3
Fill: 50.5 x 106 m3
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Tsaoling landslideTsaoling landslide
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TimeTriggered by
Landslide process
Slide volume (km3)
Dam height (m)Effects
1862Earthquake
(ML=6-7) Landslide formation of a dam
1898 Rainfall (?) Landslide dam broke
1941Earthquake
(ML=7.1) 0.10-0.15 70-14036 persons killed and formation of a dam
1942Rainfall (776mm)
0.15-0.20 140-1701 persons killed and increased landslide dam
1951Rainfall (770mm)
0.120 140-200137 persons killed and broke landslide dam
1979
Rainfall (327mm)
0.026 90 Landslide formation of a dam
Rainfall (624mm)
0.040 Landslide dam broke
1999Earthquake
(ML=7.3) 0.126 4539 persons killed and formation of a dam
Historical events in Tsaoling
Historical events in Tsaoling
Geological mapGeological map
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Stratigraphic column and profile
Stratigraphic column and profile
DTMsDTMs
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Geological profileGeological profile
Sliding area
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Cut-and-fill volume1999 vs.2003
Cut-and-fill volume1999 vs.2003
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Cut-and-fill volume2003 vs.2007
Cut-and-fill volume2003 vs.2007
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Retreat of the scarpRetreat of the scarp
main scarpmain scarp
730m
1998199920032007
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Retreat of the scarpRetreat of the scarp
155m
minor scarpminor scarp
1998199920032007
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Retreat of the scarpRetreat of the scarp
38m
1998199920032007
lateral scarplateral scarp
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Retreat of the scarpRetreat of the scarp
20032007
280m
upstream
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Retreat of the scarpRetreat of the scarp
240m
downstream
20032007
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B
ED
A
C
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