Latest news with #landslide
Times of Oman
17 hours ago
- Climate
- Times of Oman
How does Switzerland predict landslides?
Blatten: The destructive landslide in the Swiss village of Blatten is the latest natural disaster to hit valley communities in the Alpine nation. While Blatten was engulfed by a slick of icy sediment this week, early warnings of a potential landslide gave residents time to evacuate. Only one person — who chose to remain in his home — is currently unaccounted for. The search for him has been suspended. Switzerland is an early warning success story. Government agencies there use a broad range of technologies and methods to assess risks that could threaten lives and property. This includes terrain mapping and continuous monitoring of rainfall, permafrost melt, groundwater levels, tectonic shifts and ground movement. This data allows authorities to maintain hazard risk maps across the country. "Every community in Switzerland that's affected by a hazard has a hazard map. They're federally mandated for the areas where people live," said Brian McArdell, a geomorphologist at the Swiss Federal Institute for Forest, Snow and Landscape Research (WSL). In Blatten's case, officials issued alerts after a nearby rockfall destabilised the Birch Glacier. Combined with warming summer temperatures, the glacier fractured. A slurry of ice, sediment and mud then roared down the mountain to the village below. World's mountainous regions most at risk Steep slopes, unstable terrain and exposure to high rainfall or permafrost melt put mountain regions more at risk of landslides and avalanches. For valley communities in Switzerland, the potential for a landslide can mean entire towns need to be evacuated. Following the Blatten landslide, several nearby communities remain on alert, including for potential flooding. Brienz, a village around 25 miles (41 km) north of Blatten, is also preparing for possible evacuation. The town has faced repeated warnings and "near miss" rockslide events since 2023. "In general, debris flow is a mixture of coarse and fine sediment — so everything from boulders, to mud, to very fine sediments and water," said McArdell. "These events can occur quite suddenly and they're quite, quite dangerous." Regions with the highest landslide-related fatalities globally include the Himalayas, parts of Central and South America, Italy and Iran. The International Conference on Glaciers' Preservation is currently being held in Tajikistan, where Farinotti expects the release of a "Glacier Declaration" urging greater action to protect ice masses from the effects of climate change. "[It will] call for various actions and, among others, it will call for increased preparedness against risk deriving from cryospheric hazards, so avalanches," he said. Guzzetti also highlighted the UN's Early Warnings for All initiative, which aims to establish a global early warning system by 2027. If achieved, this could be a major step toward saving lives from natural hazards. While wealthy nations like Switzerland have reliable infrastructure to warn communities of potential disasters, many others are still playing catch-up. According to UN figures, only 108 countries had the capacity for "multi-hazard early warning systems" last year though that is more than double the number from 2015. The benefits are clear, said Guzzetti, pointing to the Blatten evacuation: "It seems that they were very good at evacuating the town in time, so that fatalities were nil, or very small."
The Independent
17 hours ago
- Climate
- The Independent
Flooding fears eased at picturesque Swiss Alpine village buried by landslide
A river in the Swiss Alps, which was dammed by a landslide that buried much of the village of Blatten, is now flowing through the debris, authorities have said. A huge mass of rock, ice and mud from the Birch glacier thundered into the Lötschental valley in southern Switzerland on Wednesday, destroying much of the village. Buildings that weren't buried were submerged in a lake created by the small Lonza River, whose course was dammed by the mass of material. The regional government in Valais canton said that the Lonza has been flowing through the full length of the debris since Friday. Geologist and regional official Raphaël Mayoraz said the level of the newly created lake has since gone down about 1 meter (3.3 feet). Authorities had previously worried that water pooling above the mass of rock and ice could lead to further risks. 'The speed at which this lake is emptying comes from the river eroding the deposit,' he said at a news conference. 'This erosion is relatively slow, but that's a good thing. If it is too fast, then there is instability in this channel, and that could lead to small slides of debris.' 'The Lonza appears to have found its way, but it too early to be able to give an all-clear,' said Matthias Bellwald, Blatten's mayor. The outlet of a dam downstream at Ferden, which is normally used to generate electricity, was opened partially on Friday evening to allow water to flow further down the valley and regulate the volume of water behind the dam. Authorities are still leaving open the possibility of evacuations further downstream if required, though the risk to other villages appears very low. Days before most of the glacier collapsed, authorities had ordered the evacuation of about 300 people, as well as livestock, from Blatten. Switzerland's president said on Friday that the government was looking for ways to help the evacuees.
Yahoo
a day ago
- Climate
- Yahoo
A river dammed by a huge Swiss landslide is flowing again. That's a relief to authorities
GENEVA (AP) — A small Alpine river dammed by a landslide that largely buried the Swiss village of Blatten is now flowing through the debris, and the level of a newly created lake that raised worries about potential new destruction has fallen, authorities said Saturday. A huge mass of rock, ice and mud from the Birch glacier thundered into the Lötschental valley in southern Switzerland on Wednesday, destroying much of the village. Buildings that weren't buried were submerged in a lake created by the small Lonza River, whose course was dammed by the mass of material. Authorities worried that water pooling above the mass of rock and ice could lead to risks of its own. Still, the regional government in Valais canton (state) said that the Lonza has been flowing through the full length of the debris since Friday. Geologist and regional official Raphaël Mayoraz said Saturday that the level of the lake has since gone down about 1 meter (3.3 feet). 'The speed at which this lake is emptying comes from the river eroding the deposit,' he said at a news conference. 'This erosion is relatively slow, but that's a good thing. If it is too fast, then there is instability in this channel, and that could lead to small slides of debris.' 'The Lonza appears to have found its way, but it too early to be able to give an all-clear,' said Matthias Bellwald, Blatten's mayor. The outlet of a dam downstream at Ferden, which is normally used to generate electricity, was opened partially on Friday evening to allow water to flow further down the valley and regulate the volume of water behind the dam. Authorities are still leaving open the possibility of evacuations further downstream if required, though the risk to other villages appears very low. Days before most of the glacier collapsed, authorities had ordered the evacuation of about 300 people, as well as livestock, from Blatten. Switzerland's president said on Friday that the government was looking for ways to help the evacuees.
CTV News
a day ago
- General
- CTV News
A river dammed by a huge Swiss landslide is flowing again. That's a relief to authorities
GENEVA — A small Alpine river dammed by a landslide that largely buried the Swiss village of Blatten is now flowing through the debris, and the level of a newly created lake that raised worries about potential new destruction has fallen, authorities said Saturday. A huge mass of rock, ice and mud from the Birch glacier thundered into the Lötschental valley in southern Switzerland on Wednesday, destroying much of the village. Buildings that weren't buried were submerged in a lake created by the small Lonza River, whose course was dammed by the mass of material. Authorities worried that water pooling above the mass of rock and ice could lead to risks of its own. Still, the regional government in Valais canton (state) said that the Lonza has been flowing through the full length of the debris since Friday. Geologist and regional official Raphaël Mayoraz said Saturday that the level of the lake has since gone down about one metre (3.3 feet). 'The speed at which this lake is emptying comes from the river eroding the deposit,' he said at a news conference. 'This erosion is relatively slow, but that's a good thing. If it is too fast, then there is instability in this channel, and that could lead to small slides of debris.' 'The Lonza appears to have found its way, but it too early to be able to give an all-clear,' said Matthias Bellwald, Blatten's mayor. The outlet of a dam downstream at Ferden, which is normally used to generate electricity, was opened partially on Friday evening to allow water to flow further down the valley and regulate the volume of water behind the dam. Authorities are still leaving open the possibility of evacuations further downstream if required, though the risk to other villages appears very low. Days before most of the glacier collapsed, authorities had ordered the evacuation of about 300 people, as well as livestock, from Blatten. Switzerland's president said on Friday that the government was looking for ways to help the evacuees. The Associated Press
Associated Press
2 days ago
- Climate
- Associated Press
A river dammed by a huge Swiss landslide is flowing again. That's a relief to authorities
GENEVA (AP) — A small Alpine river dammed by a landslide that largely buried the Swiss village of Blatten is now flowing through the debris, and the level of a newly created lake that raised worries about potential new destruction has fallen, authorities said Saturday. A huge mass of rock, ice and mud from the Birch glacier thundered into the Lötschental valley in southern Switzerland on Wednesday, destroying much of the village. Buildings that weren't buried were submerged in a lake created by the small Lonza River, whose course was dammed by the mass of material. Authorities worried that water pooling above the mass of rock and ice could lead to risks of its own. Still, the regional government in Valais canton (state) said that the Lonza has been flowing through the full length of the debris since Friday. Geologist and regional official Raphaël Mayoraz said Saturday that the level of the lake has since gone down about 1 meter (3.3 feet). 'The speed at which this lake is emptying comes from the river eroding the deposit,' he said at a news conference. 'This erosion is relatively slow, but that's a good thing. If it is too fast, then there is instability in this channel, and that could lead to small slides of debris.' 'The Lonza appears to have found its way, but it too early to be able to give an all-clear,' said Matthias Bellwald, Blatten's mayor. The outlet of a dam downstream at Ferden, which is normally used to generate electricity, was opened partially on Friday evening to allow water to flow further down the valley and regulate the volume of water behind the dam. Authorities are still leaving open the possibility of evacuations further downstream if required, though the risk to other villages appears very low. Days before most of the glacier collapsed, authorities had ordered the evacuation of about 300 people, as well as livestock, from Blatten. Switzerland's president said on Friday that the government was looking for ways to help the evacuees.
