Teachers First Talk 14th October 2009

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This is a general presentation on the impacts of the Wenchuan (Sichuan) earthquake in May 2008

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A review of hazards from the 2008 Wenchuan (Sichuan) earthquake : 

A review of hazards from the 2008 Wenchuan (Sichuan) earthquake David Petley http:daveslandslideblog.blogspot.com

Slide 3: 

Tibetan plateau Pengguan fault Chengdu basin Yingxiu-Beichuan Fault

Slide 4: 

Maoxian Beichuan Songpan Mianyang Deyang Jiangyou Doujiangyan Pingwu Qingchuan Lixian Mianzhu Pengzhou Wenchuan Yingxiu 14:28 12/05/2008 Mw = 7.9 D= 19 km

The Yingxiu-Beichuan fault : 

The Yingxiu-Beichuan fault

The Pengguan fault : 

The Pengguan fault

Slide 12: 

Baihua bridge Destroyed Infrastructure

Slide 13: 

Landslides: Before and After Landsat 5 18/09/2007 SPOT5 13/10/2008

26 landslides of >10 million m3 : 

26 landslides of >10 million m3

Case study – Beichuan Town : 

Case study – Beichuan Town Case study: Beichuan town

Slide 18: 

700 people killed Beichuan Middle School landslide Location of school

Slide 20: 

1600 people killed Wangjiayan Landslide (10 mins after Main shock)

Wangjiayan (Beichuan old town) landslide : 

Wangjiayan (Beichuan old town) landslide

Debris pushed ahead of the slide : 

Debris pushed ahead of the slide

Not the biggest though… : 

Not the biggest though…

An even bigger one! Wenjiagou : 

An even bigger one! Wenjiagou

The biggest of them all - Daguangbao : 

The biggest of them all - Daguangbao

Slide 27: 

Daguangbao landslide 742 million m3

Slide 28: 

Daguangbao (3047m) 平梁子(2208m) 风波岩(2027m) 白果林(1690m) 大偏桥(1230m) 小光包(2850m) 门 槛 石 沟 ② ③ 红 洞 子 沟

Landslides caused other problems tooTangjiashan : 

Landslides caused other problems tooTangjiashan

Water splash : 

Water splash Erosion from splash Probable second phase

Slide 31: 

Landslide dam Scarp 800m 620m Landslide stats:- Length: 800 m Width: 620 m Volume: 3.5 million m3 Lake

Flood wave passing the ruins of Beichuan town : 

Flood wave passing the ruins of Beichuan town Flood wave passing Mianyang city

Beichuan: multiple debris flows : 

Beichuan: multiple debris flows

Debris flows remain a major problem : 

Debris flows remain a major problem

Day to day life : 

Day to day life

Reconstruction : 

Reconstruction

New school buildings : 

New school buildings

Conclusions : 

Conclusions

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