The geotechnical trap inside Nepal’s hydropower tunnels

• On August 26, catastrophic debris flows swept down the Bhotekoshi and Trishuli river corridors, exposing severe vulnerabilities in Himalayan hydropower infrastructure.
• Several projects remain inundated, with workers still missing or trapped deep inside underground headrace tunnels and powerhouses.
• Public frustration has understandably focused on how long rescue is taking—whether enough equipment is available, whether the...