In the aftermath of a catastrophic landslide in Switzerland’s southern region, a river previously obstructed by debris is now carving a path through the fallen materials, easing concerns of additional destruction due to high water levels. The landslide originated from the Birch glacier and engulfed much of the Swiss village of Blatten in the Lötschental valley, unleashing a combination of rock, ice, and mud.
The substantial surge of earth and ice led to the formation of a new lake, as it blocked the natural course of the Lonza River. This raised alarms among local authorities about potential hazards from the accumulating water. However, recent developments indicate that the river has begun to flow through the entire accumulation of debris since Friday, indicating a natural release of the blockage.
Raphaël Mayoraz, a geologist and official in the region, reported that the lake’s water level has subsided by approximately 1 meter (3.3 feet). He explained that the gradual reduction is due to the river eroding its dam, stressing that the slow pace is beneficial. Rapid erosion, he warned, could destabilize the newly formed channel and trigger minor landslides.
Despite the progress, Blatten’s mayor, Matthias Bellwald, urged caution, stating that it is premature to declare the situation entirely resolved. Meanwhile, authorities have cautiously adjusted operations at the Ferden dam downstream. On Friday evening, the dam, typically used for electricity generation, was partially opened to manage the water flow and volume against any burgeoning threats.
The situation remains under close surveillance, with potential evacuation plans in place should they become necessary. Although the disruption poses minimal risk to neighboring villages, the possibility isn’t entirely ruled out. In a preemptive measure, around 300 villagers and their livestock from Blatten were evacuated shortly before the glacier collapsed, ensuring their safety.
On Friday, the Swiss President promised government support for the displaced residents, emphasizing efforts to assist those affected by this natural disaster. As the river continues to reestablish its course, authorities remain vigilant in monitoring the ongoing developments.