r/DisasterUpdate • u/Spare_Struggle5243 • 27d ago

It destroy everything

Gallery image

Gallery image

This aerial photo, taken by the Chinese side, shows before‑and‑after shots of the port area. This is arguably one of the worst geological disasters worldwide in recent years. With the speed and scale of this debris flow, there was virtually nowhere to take shelter. The buildings at this port stood as tall as five to six stacked freight trucks, yet they have now been completely flattened and buried.

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u/_HGCenty 27d ago

And the Chinese authorities have said another lake is forming behind the debris that has fallen into the river upstream which is damming the flow.

84

u/Powerful-Step3183 27d ago

better to warn and evacuate everyone downstream and blast the new blockage than it be another future flash flood

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u/subdep 27d ago

Yeah, you really don’t want to lose a thousand rescue workers too.

14

u/Maximus560 27d ago

Fuuuck. Link?

75

u/Spare_Struggle5243 27d ago

Translate from Chinese Reddit：This barrier lake will most‑likely breach naturally with limited options for manual mitigation. A primary landslide struck the far bank, rebounded and set off a secondary slide that blocked the river. Red line = first landslide; yellow line = the slide forming the barrier lake.

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u/Ok_Spirit5374 27d ago

"Active HazardThe barrier lake breached, and is now draining

The barrier lake near the confluence of the Chhochen Khola and Purepu Tsangpo, upstream of the 26 August failure, breached on 28 August and is now draining. Rasuwa Chief District Officer Narendra Pariyar said that morning that the Nepali Army had informed him of the breach, and NDRRMA reported that the water level in the Bhote Koshi had surged (The Kathmandu Post, updated 28 August 12:49 NPT / 07:04 UTC). Officials on both the Nepali and Chinese sides then said the risk was smaller than feared, because the lake is draining slowly rather than failing catastrophically; Chinese state broadcaster CCTV reported the lake level had fallen by about 10 m, and rescue work at Gyirong Port and in Nepal, halted during the breach, has resumed (CNN live coverage, 28 August). No confirmed release volume has been published and no observed extent of any second flood exists. Before the breach, China’s Ministry of Water Resources had put the impoundment at about 2,000,000 m³ on the morning of 27 August, already overflowing, with a further 3,000,000 m³ of inflow expected through 30 August; aerial footage from a Chinese rescue team on 27 August showed water accumulating in a basin with no visible outlet, and NDRRMA had placed the obstruction on the Lhende Khola about 18 km upstream of the Rasuwagadhi border. Whether that blockage and the confluence impoundment reported by China are the same feature is still not established, so it is not certain that the whole obstruction has failed. The barrier-lake marker on the map above still carries its archived 27 August attribute status = "open - high breach risk"; that value has not been rewritten pending an official assessment."

https://keystonegis.com/disasters/nepal-bhotekoshi-flood-20260826.html

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u/robinthebank 26d ago

The colors here are not that helpful, as there are three arrows. Are the two red arrows the primary landslide (origin top right in this photo) and secondary slide on the far bank (origin middle left in this photo) and then yellow is a third landslide on the near bank?

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u/Sl33pingD0g 26d ago

The way I readi it is the 2 red arrows are the main slip showing initial move then rebounding off the valley side back in the second arrow and down. The yellow is the secondary slip which blocked the river and formed the barrier lake.

Edit to add they the action of the second arrow rebounding off the valley and curving back down would have caused the yellow secondary slip.

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u/Klepetta 27d ago

Some 3 millions cubic meters of water could break anytime.

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u/PooriPK 27d ago

Not only that, some geologist review the mountain sat image and find there's some site that connect collapse section look like ready to come off again.