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.ing...@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...@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" <rban...@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.ing...@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> >>>> >>> >>> >>> _______________________________________________ >>> HOT mailing list >>> HOT@openstreetmap.org >>> https://lists.openstreetmap.org/listinfo/hot >>> >>> > > _______________________________________________ > HOT mailing list > HOT@openstreetmap.org > https://lists.openstreetmap.org/listinfo/hot > >
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