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20 May 2010
NDMA freeboard information for Attabad
In the absence of any other information on the state of play at Attabad, I have plotted up the daily updates on freeboard from NDMA. The reliability of these is somewhat unclear as there are often contradictions between the indicated water level rise and the daily difference between freeboard measurements. There are also sometimes errors – e.g. the data for 19th May suggests that freeboard increased rather than declined overnight, …
19 May 2010
I have no idea what is happening at Attabad now!
The situation at Attabad is now completely confused, so apologies for the lack of posts and updates, including to the monitoring site. For all the right reasons Focus have now stopped collecting their daily data because the site is too dangerous. The last measurement was before the GLOF, and the actual impact of that event is very unclear. Meanwhile various news agencies in Pakistan posted suggestions that the lake had …
18 May 2010
The final spillway at the Attabad landslide
The GLOF into the lake behind the Attabad landslide yesterday appears to have raised the water level by something over two metres, in addition to the increase of about a metre from the normal inflow (please see the data on my monitoring site). The upshot is that the freeboard is likely be 4 metres or less. Inflow has increased substantially as well to about 93 cubic metres per second. It …
17 May 2010
Even more seepage at Attabad
The rate of seepage at the Attabad landslide is now increasing at a rapid rate, and a new seepage point emerged in the last 24 hours. This graph shows the seepage rate since the start of monitoring: The current rate of increase does pose the risk of a seepage-induced failure. This is not inevitable, but the risk is increasing with time. The authorities need to be prepared for the possibility …
16 May 2010
Attabad landslide – my report and presentation from my field visit in February
As the water level at Attabad approaches the spillway, several people have asked that I reposrt the links to the report and presentation that I prepared after my field visit to the site in February. So here they are: ReportPresentation (should also be viewable below) 10_03 Attabad http://www.authorstream.com/player/player.swf?p=393289_634096013246356250 See more presentations by Dr_Dave | Upload your own PowerPoint presentations This is the presentation that I gave to NDMA in Islamabad. It is …
15 May 2010
Attabad – the spillway
The Pamir Times has today published a photo of the final spillway at Attabad. All work has now apparently ceased as the overtopping approaches:
13 May 2010
Developments at Attabad
I have today revamped the monitoring website of the Attabad landslide in Hunza, Pakistan to make the display of information more straightforward as we enter the end game of this situation. In the last day or so there have been three critical developments: 1. Seepage is increasing rapidlyToday’s seepage figure is 2.53 cubic metres per second – that is a substantial increase on yesterday, as the graph below shows: 2. …
12 May 2010
New satellite image of the Attabad landslide, Pakistan
NASA have released a new ASTER image of the lake that continues to build behind the landslide at Attabad in Hunza, N. Pakistan. Included in this image is the outline of the lake as it was in their image in March, showing the increase in surface area: A couple of things to note on this image:1. The red areas indicate vegetation. Given that this area is very close to being …
9 May 2010
The landslide at Attabad – new videos of the spillways and the drowning land upstream
Please click here for the most recent update on the Attabad landslide The lake behind the landslide at Attabad in Hunza, Pakistan continues to fill, meaning that we are probably only a fortnight or so away from the maximum point. I have not had an update from either NDMA or FOCUS for 48 hours, so am unsure as to how things have developed in the last two days. However, The …
8 May 2010
Inflow to the landslide lake at Attabad
The lake at Attabad continues to fill quite rapidly, with the water level now rising at close to 1 metre per day, as this graph using Focus data shows: The remaining freeboard is now 15.5 metres. At the current rate of increase, water will flow across the spillway on about 22nd May. However, Young and Hewitt (1990) provided a hydrograph of flow in the Hunza (apologies for the poor quality …
Dave Petley is the Vice-Chancellor of the University of Hull in the United Kingdom. His blog provides commentary and analysis of landslide events occurring worldwide, including the landslides themselves, latest research, and conferences and meetings.
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