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Dan Shugar Profile picture
Dan Shugar
@WaterSHEDLab
Ice cream maker, geomorphologist, professor. science @ intersection of steep slopes, gravity, & climate. He/him. same handle on fediscience and bluesky
Jun 10, 2021 • 16 tweets • 15 min read
On Feb 7, a torrent of water, debris, & ice cascaded down Ronti Gad, Rishiganga, & Dhauliganga valleys in Uttarakhand, India. Today in @sciencemagazine, @waterSHEDlab & colleagues provide a comprehensive explanation of the event & ensuing disaster 1/n
science.sciencemag.org/lookup/doi/10.… 204 ppl killed or missing. The event was a disaster not b/c it was big but b/c of location of infrastructure, which placed people in harm’s way. Social scientists & policy experts @disastrousComms & @upadhyay_cavita pieced together the tragic human toll. (pic @irfansalroo) 2/n
Feb 9, 2021 • 8 tweets • 4 min read
There has been a lot of confusion in the past 24hrs surrounding the term 'glacier burst' and exactly what happened to cause the #UttarakhandDisaster flood. Analysis by myself and colleagues suggested a landslide that took out part of a hanging glacier. 1/n I'd like to clear up some terminology: 'glacier burst' is not a thing (looking at you @CNN & others). It's possible someone somewhere said glacial lake outburst flood (GLOF) which IS a thing, and that got miscommunicated in the media, but we don't think a GLOF was responsible 2/n
Feb 7, 2021 • 4 tweets • 3 min read
This looks like it could be from a (unnamed?) glacier flowing from Trisul peak. @planetlabs imagery from Feb 7 (L image) shows lots of dust/moisture in the air (same as in the videos), which is not present on Feb 6 (R). @BhambriRakesh @davepetley @irfansalroo ImageImage No lakes of any size visible on the surface but unfortunately the satellite imagery doesn't show farther upvalley and so can't tell if it was from a large supraglacial landslide that might have broken up the glacier.