Manchester talk on the Sichuan Earthquake disaster

Yesterday I gave a talk to the Manchester branches of the Geographical Association and the Geological Association on the causes of the Sichuan (Wenchuan) earthquake disaster. As usual I promised to make my slides available via Authorstream. You should be able to download the presentation as well as viewing it below.:

10_03 Manchester 1

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The damage caused by landslides during earthquakes

Below is the presentation file of the keynote lecture that I gave today at the Chilean Geological Congress in Santiago. I have removed a few of the figures as they have not yet been published.

You should be able to download and to view the file below:

Damage caused by earthquake landslides

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The powerpoint file is hosted on Authorstream, which also holds many more of my presentations here:

http://www.authorstream.com/user-presentations/Dr_Dave/

Presentation from New Zealand

This week I am giving three presentations in New Zealand - first in Christchurch today, then Wellington tomorrow and Auckland on Thursday. The title of the presentation is Earthquake Induced Landslides - Lessons from Taiwan and Pakistan.

The talk is to the various branches of the New Zealand Geotechnical Society and the New Zealand Society of Earthquake Engineering.

I have uploaded the presentation to authorstream so that it can be downloaded (note that I have now given up using slideshare as I have found it too unreliable. The presentation can be found (and can be downloaded as a Powerpoint file from) here and should be viewable below:


Uploaded on authorSTREAM by Dr_Dave

Abstract:
Earthquake induced landslides – lessons from Taiwan and Pakistan

The recent Wenchuan earthquake in Sichuan Province of China has highlighted the impact of seismically-triggered landslides in mountain environments. In China, it is now estimated that approximately 28,000 fatalities, representing about 35% of the deaths in the earthquake, occurred as a result of burial by mass movements. In addition, the blockage of all of the mountain roads by landslides meant that rescue of buried victims in the so-called “golden” 24 hours was seriously impeded, and more than 150 rescuers were subsequent killed by slides triggered by aftershocks. This presentation seeks to examine the occurrence of landslides in two other major seismic events, namely the 1999 Chi-Chi earthquake in Taiwan and the 2005 Kashmir earthquake in Pakistan. Using field data from both sites, the occurrence of landslides induced by the earthquake is examined in both space and time. It is shown that the distributions of landslides are rather different in the two cases, even though they earthquakes themselves were of similar magnitudes. The reasons for this difference are explored, in particular in relation to topographic controls on the magnitude of earthquake accelerations on slopes.

In the second part of the presentation, the occurrence of landslides in the years following the earthquakes is explored. It is shown that there is a notable increase in the occurrence of landslides in the aftermath of the seismic event, and that these landslides release large volumes of sediment into the river system. This increase in landslide activity can have a major impact on the rehabilitation of earthquake-affected areas for long periods of time. Thus, there is a need to improve preparation for earthquakes in landslide-prone areas and to recognise that the impacts of such events are prolonged, rendering the recovery phase rather difficult from an engineering perspective.

Xian paper on landslide prediction and the Saito effect

Tomorrow (Friday) I am due to present a paper at the 10th International Symposium on Landslides and Engineered Slopes. The paper title is: "Temporal prediction in landslides – understanding the Saito effect". The power point file is below (there appears to be a fault on slideshare that is preventing this from being visible on blogger. If it is not visible below, you can get it from here):

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I will put the full written paper online next week. The Powerpoint slides are hosted on SlideShare and can be directly downloaded from here. Please acknowledge any use of the material.

Xian Round Table Powerpoint file

Today I participated in a round table discussion at the 10th International Symposium on Landslides and Engineered Slopes. The topic of the discussion was: "Strength criteria and design approaches for difficult soils and rocks". Each of the four panelists was asked to talk for 10-12 minutes before the panel discussion started. I was asked to talk about "Slow Moving Rockslides". So, below is my deliberately somewhat provocative presentation. (there appears to be a fault on slideshare that is preventing this from being visible on blogger. If it is not visible below, you can get it from here)

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The slides are hosted on SlideShare and can be directly downloaded from here. Please acknowledge any use of the material.

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