A study by the International Centre for Integrated Mountain Development (ICIMOD) found that the 2024 glacial lake outburst flood (GLOF) in the Everest region was caused by a complex chain of geological and geomorphological factors.
The study, titled Thame Valley Glacial Lake Outburst Flood – Causes, Impacts, and Future Risks, reveals that a rock avalanche triggered a displacement wave in a 4,900-metre-high glacial lake, releasing 156,000 cubic metres of water.
The outflow fell 120 metres and breached a second moraine-dammed lake, releasing an additional 303,000 cubic metres, resulting in a hyper-concentrated flow that carried debris, including large boulders, up to 80 km downstream.
The ICIMOD study stresses the need for urgent flood risk management in the Everest region as climate change accelerates glacial hazards.
The study shows that the GLOF caused extensive destruction in Thame, Solokhumbu.
Author's summary: ICIMOD study finds Thame GLOF was caused by a chain reaction of geological factors.