What are the options to drain the two lakes in Nepal that are exacerbating the flood risks?
If you mean the two newly formed lakes in Nepal’s Rasuwa/Lhende river area after the August 2026 glacier-collapse disaster, they are not ordinary lakes that can simply be “drained.” When rock, ice, mud, and landslide debris obstructed natural river drainage, they became temporary barrier lakes. One has already started draining, while the larger lake has been reported as growing and without a clear outlet. Strategies for lessening or eliminating the danger: Controlled breaching of the natural dam Engineers could carefully cut a channel through the debris barrier so water escapes gradually. This is potentially the fastest method, but it is extremely dangerous because an uncontrolled breach could produce another destructive flash flood. Experts quoted by Al Jazeera said controlled breaching could be considered, but the steep and complex terrain makes it difficult. Create a controlled outlet/channel Engineers could either excavate or rei...