this article is trash and does not reveal anything. it's as if two different people wrote the article and the headline.
Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
41–50 of 50 posts
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#42But he also explains that the friction of an avalanche creates a lot of heat, which could have melted much of the ice tumbling down the mountainside.
Hm. It takes 334,000 J to melt a kilogram of ice. At least; that's just the energy to go from solid to water. It takes a vertical drop of about 35Km to get that much energy. Check me on this, please.
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#43But he also explains that the friction of an avalanche creates a lot of heat, which could have melted much of the ice tumbling down the mountainside. Hm. It takes 334,000 J to melt a kilogram of ice. At least; that's just the energy to go from solid to water. It takes a vertical drop of about 35Km to get that much energy. Check me on this, please.
That's for ice at 0°C too. I make it a 34km drop for 1kg of ice to gain that much energy. Are we missing something?
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#44But he also explains that the friction of an avalanche creates a lot of heat, which could have melted much of the ice tumbling down the mountainside. Hm. It takes 334,000 J to melt a kilogram of ice. At least; that's just the energy to go from solid to water. It takes a vertical drop of about 35Km to get that much energy. Check me on this, please.
That's for ice at 0°C too. I make it a 34km drop for 1kg of ice to gain that much energy. Are we missing something?
I wonder if that author was misquoted. He has a PhD in glacier hydrology.[1] He has to know there just isn't enough potential energy in falling ice to melt it rapidly.
[1] https://udayton.edu/directory/artssciences/geology/haritashy...
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#45Earlier quoted context omitted.
That's for ice at 0°C too. I make it a 34km drop for 1kg of ice to gain that much energy. Are we missing something?
I wonder if that author was misquoted. He has a PhD in glacier hydrology.[1] He has to know there just isn't enough potential energy in falling ice to melt it rapidly. [1] https://udayton.edu/directory/artssciences/geology/haritashy...
Could well be. Maybe it's about it falling to lower altitudes with higher temperatures, and the friction of the avalanche warms it a bit and breaks it up so it can melt quickly in the warmer air.
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#46But he also explains that the friction of an avalanche creates a lot of heat, which could have melted much of the ice tumbling down the mountainside. Hm. It takes 334,000 J to melt a kilogram of ice. At least; that's just the energy to go from solid to water. It takes a vertical drop of about 35Km to get that much energy. Check me on this, please.
At the Bondo landslide in Switzerland 2017 (https://www.bbc.com/news/world-europe-41036851), a lot of water came from glacier ice melted from tumbling down.
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#47I never forget 16 June 2013.
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#48I never forget 16 June 2013.
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#49But he also explains that the friction of an avalanche creates a lot of heat, which could have melted much of the ice tumbling down the mountainside. Hm. It takes 334,000 J to melt a kilogram of ice. At least; that's just the energy to go from solid to water. It takes a vertical drop of about 35Km to get that much energy. Check me on this, please.
At the Bondo landslide in Switzerland 2017 ( https://www.bbc.com/news/world-europe-41036851 ), a lot of water came from glacier ice melted from tumbling down.
Not seeing that in the article. That looks like a combined avalanche and mudslide.
It's normal for sliding ice to melt under pressure at the surface, lubricating movement. That's how ice skating works.
Re: Satellites Reveal Cause of Uttarakhand Flood That Devastated Hydroelectric Dams
#50I spent 2 years on a motorbike all over Northern Vietnam / Cambodia / Laos. The number of hydro dams being built by these countries (and China) in the region along the Mekong is insane. They already feel the effects from this... in the summer the rivers dry up to the point that you're driving a motorbike across dry lake beds and in the winter (aka: rainy season) there is massive landslides and the dams break and wash…
Just a quick follow up... saw this article in the local VN paper today... it is a massive eco disaster.
https://tuoitrenews.vn/news/international/20210212/mekong-ri...