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Landslides and Engineered Slopes: Protecting Society through Improved Understanding

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Institute of Hazard, Risk and Resilience Landslides and Engineered Slopes: Protecting Society through Improved Understanding David Petley Dean of Research and Wilson Professor of Hazard and Risk Twitter: @ davepetley Blog: http :// blogs.agu.org/landslideblog

Kharapani, Nepal, 5th May 2012:

Kharapani , Nepal, 5 th May 2012 Photos: Kunda Dixit and Robin M arston

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Annapurna IV landslide © Avia Club Nepal

Global losses from landslides UN EM-DAT dataset:

Global losses from landslides UN EM-DAT dataset Number of people killed by landslides Number of recorded landslides

Collecting data on landslides that kill people:

Collecting data on landslides that kill people

Supplemented more recently with the blog:

Supplemented more recently with the blog All landslide data will be available online in late Summer 2012

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

Global landslide distribution 2004 - 2010:

Global landslide distribution 2004 - 2010

East Asia:

East Asia Philippine Sea Plate

South Asia:

South Asia

Nepal landslide distribution through the year:

Nepal landslide distribution through the year 0 90 180 270 365

Central and South America:

Central and South America

Landslide occurrence through time:

Landslide occurrence through time

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Average global annual cycle

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Fatalities (non-seismic) Landslides (non-seismic) All landslides Non-seismic landslides

Post seismic effects: cumulative fatalities from non-seismic landslides in Sichuan Province, China:

Post seismic effects: cumulative fatalities from non-seismic landslides in Sichuan Province, China Wenchuan Earthquake

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Wenchuan Earthquake Post seismic effects: cumulative fatalities from non-seismic landslides in Sichuan Province, China

Developing country burden - Nepal:

Developing country burden - Nepal

Landslides and deaths in Nepal:

Landslides and deaths in Nepal Cumulative total of lives lost Cumulative total of landslides

Hong Kong: trends in loss of life to landslides:

Hong Kong: trends in loss of life to landslides GEO established in 1977 Early data: GEO and Andrew Malone

Improved knowledge: research publications on landslides Papers in ISI peer-reviewed journals:

Improved knowledge: research publications on landslides Papers in ISI peer-reviewed journals

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Lives lost vs number of publications by country

Landslide density against population density for countries with n>10 deaths:

Landslide density against population density for countries with n>10 deaths Bhuta n Countries with high levels of r esearch

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Lives lost vs number of publications by country

Non-seismic (i.e. rainfall) landslide fatalities in China 1995-2011:

Non-seismic (i.e. rainfall) landslide fatalities in China 1995-2011

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Number of papers Number of fatalities Role of improved understanding in loss reduction in China

So, there is strong evidence that improved understanding is important:

So, there is strong evidence that improved understanding is important In general, geographically-specific research seems to be associated with a reduction in deaths from landslides So focused research should be part of a strategy for reducing losses from landslides

Publication rates on academic papers:

Publication rates on academic papers World (right hand axis) China India Nepal Colombia Philippines

Landslides and Engineered Slopes: Protecting Society through Improved Understanding:

Landslides and Engineered Slopes: Protecting Society through Improved Understanding Improved understanding needed but underway Improved understanding needed

Conclusions:

Conclusions

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/

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