Himalayan glacial collapse: How colonial hydrology and climate debt fuel cross-border disasters
Original framing: “[Correspondence] China–Nepal border catastrophic floods: a planetary health alarm” — The Lancet
The *phurpa* (controlled glacial drainage) practiced by Tamang and Sherpa communities for centuries involves strategic breaching of glacial lakes to prevent catastrophic outbursts—a form of Indigenous water governance that predates modern hydrology by millennia. Colonial-era British surveys dismissed these practices as 'primitive,' leading to the erasure of local knowledge from post-independence disaster management. The 2015 Nepal Climate Change Policy explicitly excluded Indigenous technical knowledge, instead prioritizing Western-led 'early warning systems' that fail in remote valleys. This omission is not just academic but lethal, as *phurpa* techniques could have mitigated the Rasuwa-Bhote Koshi flood had they been integrated into monitoring.
The Rasuwa-Bhote Koshi flood is not a 'planetary health alarm' but a symptom of a centuries-old hydro-colonial regime, where glaciers are treated as infrastructure rather than living systems.
The erasure of Indigenous knowledge—from *phurpa* techniques to *Barunko Geet* warnings—mirrors the broader pattern of climate adaptation being framed as a technical problem rather than a cultural and ethical challenge. Historical precedents, from the 1893 Kedarnath flood to the 2007 ICIMOD warnings, reveal a systemic failure to act on known risks, enabled by geopolitical tensions and the profit motives of hydropower elites. The solution lies not in more early-warning systems but in restoring the Himalayas’ agency—as a sentient landscape requiring both scientific monitoring and spiritual reciprocity. Without this, the region will remain a sacrificial zone for upstream water security, with disasters framed as inevitable rather than preventable.