[HOT] HOT: Glacial & landslide dammed lakes

Steve Bower sbower at gmavt.net
Wed May 13 16:25:46 UTC 2015


Tsho Rolpa, northern Dolakha district, is another glacial lake renowned for
having an unstable natural dam, putting thousands at risk downstream.

http://www.bigmaybe.com/learn?s=Tsho_Rolpa

Perhaps there is an existing assessment of natural dams at risk of failing.

Steve

On Wed, May 13, 2015 at 10:59 AM, Sam Inglis <sam.inglis at gmail.com> wrote:

> Dear All,
>
> I agree totally, the hydropower issues are enormous - a very important
> case study of the 1985 Dig Tsho glacial lake disaster, studied by Vuichard
> & Zimmerman in 1987, revealed the destructive potential of Glacial Lake
> Outburst Floods (GLOFs) and LLOFs.
>
> Please see via:
> https://drive.google.com/open?id=0B3qRfjnIhqMhfm44dlZnM2x3Um1ia09mV2FwNHhLQmR2TDZKNVBaNFlyNENERkNZTkNmOU0&authuser=0
>
> I would be happy to scan the satellite imagery for viable sites, but the
> main issue is LLOFs (Landslide-dammed Lake Outburst Floods) in the
> immediate future. In order to identify these, the HOT team needs to make
> current satellite imagery available (my apologies if this has already been
> done).
>
> I am also quite busy at the moment, and very sadly (selfishly) cannot
> commit to mapping the situation in the next day or so. However, the key
> things to be looking out for are* landslide-dammed lakes*. They are
> highly destructive, enormously unstable, filled by glacial melt waters,
> debris, rainwater, and anything else entrained by the waters, and very
> deadly.
>
> These features form very rapidly - a 6km lake formed and burst within a
> couple of days along the Sutlej River, due to a combination of internal
> pressure (the river has a naturally high discharge rate), compounded by a
> cloudburst.
>
> Also keep an eye out for shifting glaciers, as their migrations will
> release sub- or englacial (internal) meltwater - the slipping of glaciers
> down valley may have blocked sections of rivers, and would create very
> dangerous situations.
>
> I could try and come up with a brief handbook on what to look out for, so
> that the features can be identified, in the next 4 days? If this agreeable,
> someone should just give me an idea of what the team needs, and I'll work
> to spec!
>
> Thanks,
>
> Sam Inglis MSc
>
> <http://hk.linkedin.com/in/saminglis/>
> <https://www.facebook.com/sam.inglis.92>
> <https://twitter.com/the_ice_man_24>[image: +852 6036 8750]
> <(+852)+6036+8750>[image: sam_urai_24] <sam_urai_24>
>
> On 13 May 2015 at 14:36, amrit karmacharya <amrit.im at gmail.com> wrote:
>
>> hi sam
>>
>> all of the hydropower plants in nepal are dependent on glacial rivers. is
>> it possible to identify lake formation and bursting in the areas upstream
>> of these powerplants? losing power source would be terrible.
>> On 13 May 2015 04:44, "Robert Banick" <rbanick at gmail.com> wrote:
>>
>>> Hi Sam,
>>>
>>> I think honestly you’re better placed to tell us how you can help than
>>> the other way around. Most of us aren’t glacial lake experts :-)
>>>
>>> My first thought is that you can trace lakes in the affected areas into
>>> OSM. The second would be to help us understand what, if any, risks can
>>> result from lakes being dammed by landslides. Are there risks associated
>>> with eventual bursts? Do we need to create data in OSM and then try to
>>> model these risks in GIS software packages?
>>>
>>> You tell us!
>>>
>>> Cheers,
>>> Robert
>>>
>>>>>> Sent from Mailbox <https://www.dropbox.com/mailbox>
>>>
>>>
>>> On Tue, May 12, 2015 at 2:10 AM, Sam Inglis <sam.inglis at gmail.com>
>>> wrote:
>>>
>>>> Dear HOT Team,
>>>>
>>>> My name is Sam Inglis, and my background is in glacial lake detection,
>>>> identification and mapping, and was the first person to identify all
>>>> glacial lakes in the North Patagonian Icefield, Chile. I am familiar with
>>>> Himalayan mountain ranges, and studied large swathes of the Indo-Tibetan
>>>> catchment of the Sutlej River, which runs from near Mt Kailash, transects
>>>> Himachal Pradesh, and terminates in Pakistani territory.
>>>>
>>>> I have previously not engaged much in communal, open-source, reactive
>>>> disaster mapping, but have been adding to the OSM database in Nepal
>>>> sporadically over the past two weeks, when time has permitted.
>>>>
>>>> Yesterday, I saw that NASA had posted an article
>>>> <http://was%20the%20first%20person%20to%20identify%20all%20glacial%20lakes%20in%20the%20North%20Patagonian%20Icefield,%20Chile,>
>>>> on the formation of landslide-dammed lakes along Nepal's rivers, near
>>>> Gorkha, and was wondering how I can best contribute to enhancing the
>>>> understanding of the features? How can I help with such hazard detection &
>>>> analysis?
>>>>
>>>> Thanks, and I look forward to hearing back from you and the team!
>>>>
>>>> Keep up the great work!
>>>>
>>>> Sam Inglis MSc
>>>>
>>>>  <http://hk.linkedin.com/in/saminglis/>
>>>> <https://www.facebook.com/sam.inglis.92>
>>>> <https://twitter.com/the_ice_man_24>[image: +852 6036 8750]
>>>> <(+852)+6036+8750>[image: sam_urai_24] <sam_urai_24>
>>>>
>>>
>>>
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>>>
>
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