Presentation Transcript
On the Triggering of Landslides in the Chi-Chi Earthquake :On the Triggering of Landslides in the Chi-Chi Earthquake David Petley http:daveslandslideblog.blogspot.com
Fatal, rainfall-induced landslides: 2006, 2007 and 2008 :Fatal, rainfall-induced landslides: 2006, 2007 and 2008
Cumulative landslide fatalities :Cumulative landslide fatalities Kashmir earthquake Wenchuan earthquake Typhoon Morakot
Studies of earthquake-induced landslides :Studies of earthquake-induced landslides
Publications on earthquake-triggered landslides by event: ISI Web of Science :Publications on earthquake-triggered landslides by event: ISI Web of Science
Papers on landslides and the Chi-Chi earthquakeISI Web of Science :Papers on landslides and the Chi-Chi earthquakeISI Web of Science
Area affected by landslides vs earthquake magnitude :Area affected by landslides vs earthquake magnitude Wenchuan earthquake Chi-Chi earthquake After Keefer 1984 and others,
updated with recent events
The three key advances from the Chi-Chi earthquake :The three key advances from the Chi-Chi earthquake The spatial distribution of landslides, and their relationship with seismic parameters
The role of topographic amplification in landslide initiation
Post-seismic sediment production
1: Landslide distribution :Map: Khazai and Sitar (2003);
Stats: Liao and Lee (2000), Lin et al. (2000) 1: Landslide distribution 21,000 landslides
9,727 landslides > 625 m2
Slide 12:Map: Khazai and Sitar (2003)
Slide 13:Meunier et al. 2007 Distance from epicentre (km)
Kashmir earthquake :Kashmir earthquake Number of landslides 600
500
400
300
200
100
0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Distance from fault rupture (km) 83% of landslides within 2 km of fault
Nearly all on hanging wall
Role of lithology :Role of lithology Map: Khazai and Sitar (2003)
2. Topographic effects in rock slope failure :2. Topographic effects in rock slope failure Sepulveda et al. 2005
Slide 18:Meunier et al. 2008
Slide 19:Meunier et al. 2008
3. Sediment production:Example from the Choushui River catchment :3. Sediment production:Example from the Choushui River catchment Lin et al. 2006
Beichuan Main image: Prof Huang Runqiu :Beichuan Main image: Prof Huang Runqiu
Conclusions :Conclusions