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You are browsing the archive for Landslides Mudslides.

19 July 2010

The Attabad lake is now at its highest level so far

Today’s NDMA report paints a surprising picture of the Attabad barrier lake. It reports that the water level  has risen by 36 inches (91 cm) over the weekend, meaning that it is now at its highest ever level.  I will try to post the graphs of lake level and discharge in the next three hours or so.

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13 July 2010

Attabad – lake level is high but steady

The latest NDMA reports show that the lake level at Attabad is at its highest level to date, but is holding steady.  As before, I have used the reports and the NDMA data to reconstruct the lake level data, to produce a graph that is consistent with NDMA for the last two weeks: Meanwhile, it appears that the discharge through the spillway has increased again, once more using the NDMA …

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10 July 2010

Attabad – the lake level has apparently risen again

Interesting developments at Attabad, as various press reports suggest that the lake level increased substantially once again yesterday.  The Pamir Times for example reports that the lake level went up by 11 inches (28 cm) yesterday; this magnitude of increase is reported elsewhere too.  I have used the data and the graph in the NDMA daily reports to build a dataset of the lake level with time: If these reports …

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9 July 2010

Increased landslide occurrence at Attabad

Various media reports suggest that the rate of landslide activity has dramatically increased today on the slopes above the Attabad lake.  For example, SAMAA is reporting that “Series of landsliding still continues in intervals in Ataabad, Hunza, causing difficutlties for the boat service, SAMAA reported Friday.  Process of landsliding has started in intervals since last night in Hunza, Ataabad. Boat service however being continuing.” A key concern remains the potential …

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Attabad – what can NDMA do now?

The situation facing NDMA at Attabad remains very challenging.  They continue to need to manage both an understandably restive displaced population and a dam that has reached some kind of dynamic equilibrium, with no major changes appearing to be occurring.  In addition, the optimum solution for the upstream population (draining of the lake) is at odds with the probable wishes of the downstream population (stabilise the lake in place such …

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8 July 2010

Can Attabad fail?

A number of commenters here have suggested that the structure of the dam is such that it cannot now fail due to the presence of the large boulders.  So I thought I’d write a short post exploring whether this is actually the case.  I believe that it can still fail, and indeed that eventually it probably will, but I have no idea as to the likely time-frame.  The reasons that …

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7 July 2010

New EO-1 ALI satellite image of Attabad

NASA have released a new satellite image of the Attabad landslide and lake, collected by the Advanced Land Imager (ALI) instrument on the EO-1 satellite on Saturday 2nd July.  The images are excellent, showing both the lake and the dam and spillway with only limited cloud cover (note that north is to the right on these images): The box indicates the following close-up image: They also link to this site, …

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6 July 2010

Attabad – no substantial changes in the lake level reported by NDMA

Thanks to various commenters on the Attabad threads for their incredibly helpful and interesting contributions – this is something that I really value – and also for seeking out the latest information on the situation now that my usual feed has dried up.  NDMA posted a report dated 5th July (but helpfully they got the file name wrong  – thanks to Divalent for tracking down the right one here) that …

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3 July 2010

Attabad – Analysis of NDMA data on lake level

Yesterday’s daily update from NDMA contained a new, and very welcome addition: a graph showing lake level, starting 29th May (the date of overtopping).  The y-axis is slightly confusingly labeled on the sheet (the label having been added later by the looks of it), but is clearly the lake level (in inches – NB 1 inch = 2.54 cm) above the spillway base level at the time of overtopping: There …

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1 July 2010

Attabad – limited information flows

Unfortunately, I am not currently receiving any updates on the situation at Attabad, so it is hard to post on what is going on.  The best that I can do at the moment is to report the various figures from the media, although it is far from clear as to whether these are reliable. The last set of data that I received from the site was for 25th June.  At …

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