By Shishir Prashant 
PrashantNews
The catastrophic floods that have devastated Nepal’s Bhote Koshi-Trishuli river corridor should serve as a stark warning to Uttarakhand, a Himalayan state that enacted a floodplain zoning law more than a decade ago but has struggled to implement it comprehensively.
Nepal’s August 26 disaster was triggered by a massive glacial collapse near the Nepal-China border, sending an extraordinary torrent of water, ice, rock and mud down the mountain valleys. It was not a conventional river flood caused by rainfall alone. But its devastating impact was amplified by the concentration of settlements, roads, bridges and hydropower infrastructure along narrow river corridors.
Nepal’s latest official figures show 1,377 bodies have been recovered and 5,130 people remain missing. More than 13,600 people have been rescued. The disaster also severely damaged hydropower installations along the Bhote Koshi-Trishuli system. A preliminary UNDP assessment estimated that the floods and mudflows deposited about 2.2 million tonnes of debris in the areas studied, while 11 hydropower stations and 15 projects under construction were damaged.
The lesson for Uttarakhand is not that floodplain zoning can prevent a glacial collapse or debris flow. It cannot. The lesson is that where development is permitted matters enormously when the nature of Himalayan hazards is changing.
Uttarakhand already has a legal framework for this. The Uttarakhand Flood Plain Zoning Act was enacted in 2012-13, with the legislation subsequently becoming a subject of judicial scrutiny. The Act was enacted during the tenure of Alok Kumar Jain as Chief Secretary who played a major role. The legislation received the Governor’s assent on January 24, 2013. Its objective was straightforward: survey rivers, delineate their floodplains, classify areas according to flood risk and restrict activities in vulnerable zones. It also gives the Flood Zoning Authority powers to order removal of unauthorised obstructions, with the cost recoverable as land revenue.
In 2015, the Supreme Court noted that the state had not produced evidence showing that surveys had been completed and floodplains identified for its rivers. It directed the state to undertake the exercise and, as an interim measure, prohibited permanent and semi-permanent construction within 100 metres of the river’s centre in the specified areas.
Yet more than a decade later, questions remain over the comprehensive demarcation and protection of river floodplains.
That gap matters because Uttarakhand has repeatedly witnessed flash floods, cloudbursts, debris flows and landslides. The destruction at Dharali in August 2025 demonstrated how vulnerable settlements can become when construction and natural drainage channels intersect.
Nepal has now provided another, devastating reminder: Himalayan rivers need space—not merely for ordinary floods, but for extraordinary events carrying enormous quantities of water, rock and debris.
The question Uttarakhand must confront is therefore simple: will it map and protect its river corridors before the next extreme event, or wait for another disaster to demonstrate the cost of not doing so?