14_03 UBC 2 for sharing

Views:
 
     
 

Presentation Description

Presentation for UBC Geological Engineering Distinguished Lecture on Earthquake-induced landslides - lessons from Taiwan, Pakistan, China and New Zealand

Comments

Presentation Transcript

PowerPoint Presentation:

Institute of Hazard, Risk and Resilience Earthquake-induced landslides - lessons from Taiwan, Pakistan, China and New Zealand Dave Petley Dean of Research and Wilson Professor of Hazard and Risk Twitter: @ davepetley Blog: http :// blogs.agu.org/landslideblog

PowerPoint Presentation:

“Landslides just aren’t a s ignificant hazard…” “After all, I’ve never heard of any…”

Fatal landslides: 2004-2010:

Fatal landslides: 2004-2010 Number of deaths recorded: 80,058 people Number of non-seismic landslide events that i nvolved at least one death: 2,620 Causing: 32,322 deaths Number of deaths from s eismic landslides: 47,736 Petley 2012 Geology

Global distribution of landslides that led to loss of life 2004 - 2010:

Global distribution of landslides that led to loss of life 2004 - 2010

PowerPoint Presentation:

7.6 km Mount La Perouse, Alaska 16/02/2014 Image: Colin Stark

PowerPoint Presentation:

Image: Brett Olson and Marten Geertsema

PowerPoint Presentation:

“But landslides aren’t important in earthquakes…”

PowerPoint Presentation:

Image: Runqiu Huang

Case study – Beichuan Town:

Case study – Beichuan Town Beichuan Fault, Wenchuan Earthquake zone Image: Runqiu Huang

PowerPoint Presentation:

Image: Runqiu Huang

PowerPoint Presentation:

Beichuan Middle School landslide Location of school Image: Runqiu Huang

PowerPoint Presentation:

Old Town Landslide (10 mins after m ain shock) Image: Runqiu Huang

Tangjiashan landslide dam crisis:

Tangjiashan landslide dam crisis Image: Runqiu Huang

Post-seismic debris flows:

Post-seismic debris flows Image: Runqiu Huang

PowerPoint Presentation:

“They’re just a superficial, transient effect…”

The 1999 Chi-Chi earthquake:

The 1999 Chi-Chi earthquake

The two big ones…:

The two big ones… Chen et al. (2014) C.T. Lee

PowerPoint Presentation:

1986 1999 2000 2000 2004

PowerPoint Presentation:

2000 2004

Before the earthquake:

Before the earthquake Hydroelectric scheme inlets Image: J-C Lin

November 2006:

November 2006 Image: J-C Lin

PowerPoint Presentation:

“But their effects are just localised…”

PowerPoint Presentation:

Image: A. Kausar

:


PowerPoint Presentation:

Dunning et al.

Breach event can release devastating floods:

Breach event can release devastating floods Image: K. Hewitt

And local drawdown landslides:

And local drawdown landslides Image: K. Hewitt

But multiple small slides can be devastating to roads :

But multiple small slides can be devastating to roads

PowerPoint Presentation:

“But they’re local events in the scale of earthquakes…”

PowerPoint Presentation:

Daguangbao landslide >1000 million m 3 Largest non-volcanic landslide since 1911 4km 1km 2km Image: Runqiu Huang

PowerPoint Presentation:

Da Guangbao (3047m) 2208 m 2027 m 1690 m 1230 m 沟 Image: Runqiu Huang

PowerPoint Presentation:

“And really they’re quite simple – it’s just a matter of friction…”

PowerPoint Presentation:

“But only really big earthquakes cause landslides…”

PowerPoint Presentation:

Map: GNS Science, New Zealand Mw = 6.2 Mw = 7.1 Mw = 6.0 Mw = 5.9

PowerPoint Presentation:

Space – the final frontier…

PowerPoint Presentation:

N Kashmir landslides 2252 landslides > 625 m 2 NB: Chi-Chi= 9272

PowerPoint Presentation:

0.8 g Ground accelerations : Ragukanth 2008 0.6 g 1.0 g 1.2 g 1.4 g 1.6 g 0.6 g 0.8 g 1.0 g 1.4 g 1.2 g Landslide distribution does not match modelled horizontal ground accelerations

PowerPoint Presentation:

Landslide density/ratio map – Wenchuan Earthquake Distance from Beichuan fault Hanging wall – footwall effect Beichuan fault Pengguan fault Images: Robert Parket

PowerPoint Presentation:

Chi Chi Finisterre Northridge Distance from fault rupture Wenchuan Meunier et al 2007 Main graph: Robert Parker

PowerPoint Presentation:

Prediction is very difficult, especially about the future . Niels Bohr

PowerPoint Presentation:

Kathmandu destroyed in an earthquake in 1934 ?20,000 deaths

PowerPoint Presentation:

Himalayan Seismic gaps (Roger Bilham)

Previous hazard map with major roads:

Previous hazard map with major roads

Wellington 2% in 50 yrs – GNS Science:

Wellington 2% in 50 yrs – GNS Science

PowerPoint Presentation:

Conclusion The future, according to some scientists, will be exactly like the past, only far more expensive . John Sladek

PowerPoint Presentation:

Institute of Hazard, Risk and Resilience David Petley Email: d.n.petley@durham.ac.uk Twitter: @ davepetley Blog: http ://blogs.agu.org/landslideblog/

authorStream Live Help