Confirmation of the presence of three snow lakes at 5,350 meters by the technical team that reached the site
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The technical team that went from Kathmandu for on-site study has made a preliminary conclusion that there was a flood and a dry landslide in Til village in Namkha Rural Municipality of Humla on May 1st due to 'thermokarst'.
The spokesperson of National Disaster Risk Reduction and Management Authority, Ram Bahadur KC, says, "The study team is returning after reaching the incident site. According to the latest update, it is called 'thermokarst', but the team has found three glaciers at 5,350 meters where two glaciers were seen before." It is called 'permafrost'. The process of permafrost melting due to temperature increase is called thermokarst.
Before sending the technical team for the on-site study, the joint preliminary analysis of the Authority and ISIMOD estimated that the landslide occurred in Til village due to 'thermokarst'. Arunbhakt Shrestha, a senior climate change expert at ISIMOD, said, "Since the local people arrived at the scene at the beginning, when analyzing the photos, videos and satellite images taken by them, it was initially estimated that the flood caused the landslide due to the erosion of the permafrost (melting under the ground). "
In the on-site study, "thermokarst" was found to be the main cause, said KC, the authority's spokesperson. "After the melting of the underground part, there was a flood and landslide towards the village due to erosion from the weak part. It is steep because there is no erosion, the snow on the surface of the lake has collapsed," he said.
The study team going to Namkha includes Sushil Kumar Shrestha, Senior Divisional Engineer of National Disaster Risk Reduction and Management Authority, Shiv Kumar Baskota, Senior Divisional Geologist of Mines and Geology Department and Sauhadr Joshi, Hydrologist of Water and Meteorology Department .
Shrestha, a senior climate change expert at ISIMOD, also says that the flood of Til village is the first in the context of Nepal. "This type of new incident has not happened much in Nepal, due to the increase in temperature, it can be assumed that the incident on Til village has now started to show the problem of 'permafrost' erosion in Nepal," he says, "scientific studies are necessary in this regard". The incident of Til village is not related to Himtal explosion.'
32 families from 18 houses in Til village were displaced due to floods and landslides. 5 wooden bridges of Tilchung River were washed away. Two houses and a 15 kilowatt hydropower house worth 12 million were damaged. The wells being irrigated in about 400 plantations have been washed away . The water line of the village was damaged.
