Rising GLOF risk shadows Kashmir’s strategic Ladakh route

Srinagar: Above Sonamarg—a strategic corridor linking Kashmir to Ladakh and a major tourist destination—and across the high-altitude belts of south Kashmir, a cluster of glacial lakes sits on the edge of a growing danger.

The Jammu and Kashmir government has confirmed that five of these lakes are at high risk of Glacial Lake Outburst Floods (GLOFs), sudden and potentially devastating releases of water that can inundate entire stretches downstream.

The identification marks a shift from scientific concern to official acknowledgment of a climate-linked threat that has been intensifying across the Himalayas.

The assessment draws on recent studies led by glaciologist Dr Irfan Rashid at the University of Kashmir, which analysed glacial lakes across the region using satellite data over several decades.

The research points to a steady expansion of several lakes and increasing instability in their natural barriers.

“These lakes are expanding and becoming more unstable due to rising temperatures,” Rashid has noted in his work on Himalayan glacial systems.

Glacial lakes are formed when retreating glaciers leave behind depressions that fill with meltwater. Unlike conventional lakes, they are typically held together by moraine—loose rock and ice debris—making them structurally weak. Even minor disturbances can trigger a breach, releasing large volumes of water, debris and ice within a short span.

According to Himalayan glaciologist Dr Anil V Kulkarni, warming trends are accelerating glacier retreat across the region, contributing to the rapid growth of glacial lakes and increasing the risk of outburst floods.

The triggers for a GLOF are varied but increasingly common. Cloudbursts, avalanches, landslides or even seismic activity can destabilise the fragile moraine dams. In Kashmir, where extreme weather events have become more frequent in recent years, such risks are rising.

The study maps downstream exposure across central and south Kashmir, along the Sindh in Ganderbal district—covering Sonamarg and Kangan—and the south Kashmir river systems, including the Shopian–Kulgam belt.

Scientific assessments estimate that over 2,700 buildings, 15 bridges and key road stretches fall within vulnerable zones in the event of a major outburst, highlighting the potential scale of damage.

The risk also carries strategic implications. The Sindh valley, which drains areas around Sonamarg, forms part of the Srinagar–Leh axis, a key road link connecting Kashmir with Ladakh and serving as a critical supply route to forward areas along the borders with China and Pakistan.

This corridor has remained central during past conflicts, including the Kargil War in 1999 and the heightened tensions along the Line of Actual Control following the Galwan Valley clash in 2020.

Any large-scale disruption caused by a GLOF in this corridor could affect civilian movement as well as military logistics, particularly during the peak summer season when connectivity to Ladakh is at its highest.

“What makes Kashmir particularly vulnerable is its geography. Rivers originating from high-altitude lakes descend rapidly into densely populated valleys, unlike the sparsely inhabited regions of Ladakh,” said an expert.

This, he said, increases the likelihood of damage to settlements, infrastructure and agricultural land.

Despite the warning, Kashmir has not recorded a major GLOF event so far. However, experts caution that the absence of past incidents should not be seen as reassurance, especially as glacier retreat has accelerated over the past two decades.

Another challenge is the lack of detailed ground data. While satellite monitoring has improved the tracking of glacial lakes, precise measurements of lake depth and volume remain limited. Authorities have indicated that field-based studies and improved monitoring systems are being planned.

Chief Minister Omar Abdullah has said the classification reflects heightened susceptibility rather than an immediate threat, but stressed the need for continuous monitoring and preparedness.

Experts say early warning systems must be complemented by local awareness and evacuation planning. While flood risks are familiar in Kashmir, GLOFs are far more sudden and destructive, leaving little time for response.

For now, the lakes remain intact, their waters held back by fragile natural barriers. But as climate pressures mount, the warning is clear: the threat may lie high in the mountains, but its impact will be felt far below.