‘We have to contribute to nature’: Meet the communities ‘marrying glaciers’ to bring new water to life
When Glaciers Shrink, Villages Adapt: The Ancient Art of Glacier Grafting in Gilgit-Baltistan
Poinews.com – Across the high-altitude valleys of the Himalaya and Karakoram ranges, a quiet crisis is unfolding. Rising temperatures are accelerating the melt of mountain glaciers, shrinking the very ice fields that have fed rivers, fields, and livestock for millennia. The consequences are already visible: glacial lake outburst floods grow more frequent, while the seasonal meltwater that communities depend on for spring and summer irrigation arrives in diminished quantities. In the Pakistan-administered autonomous territory of Gilgit-Baltistan, nestled within the wider disputed Kashmir region, residents are reaching back centuries into local tradition to answer a very modern problem. They are practising what is known locally as Gang Khswa — glacier grafting — a technique that effectively engineers new, smaller glaciers to sustain water supply through a warming climate.
A Practice Rooted in Oral Tradition
Glacier grafting was formally revived in the 1990s, yet its ecological logic stretches back at least to the 14th century. Historical accounts attribute the first recorded grafting to the Persian Sufi saint Mir Syed Ali Hamadani, who allegedly created an artificial glacier as a defensive measure to deter invaders. The knowledge has been transmitted largely through oral lineage rather than written record.
"The history of glacier grafting is largely oral, not written, although some books contain references [to the craft]," Nazir Ahmed, CEO of the Baltistan Culture & Development Foundation, explains.
For the communities of Baltistan, the practice is inseparable from identity, ancestry, and a deep familiarity with high-altitude hydrology. It is not imported technology; it is inherited craft.
The Male and the Female: How a New Glacier Is Born
The technique earns its evocative nickname — "glacier marriage" — from the pairing of two distinct types of ice. A male glacier is typically grey, laden with debris such as soil, sand, and pebbles. A female glacier, by contrast, is paler, nearly transparent, free of sediment, and yields a greater volume of meltwater. Dozens of porters harvest ice fragments from both sources, then carry the pieces in wooden baskets strapped to their backs. Wherever the terrain permits, they travel by vehicle; beyond that, they walk. The ice must never touch the ground during transit.
The destination site is selected with considerable care. Dr. Zakir Hussain Zakir, Director of Planning and Development at the University of Baltistan, outlines the criteria:
"The ideal grafting site to create a new glacier needs to be at an altitude of at least 4,000 metres, have a high permafrost level, have maximum wind exposure and minimum exposure to sunlight, and ideally should be north-facing."
Once the porters arrive, the ice fragments are deposited into a pre-dug well or an existing cave. Male and female pieces are separated by clay pots filled with water drawn from the Indus River. Layers of sawdust, charcoal, and apricot kernels are packed over the ice, repeated multiple times to build insulation that shields the mass from premature melting.
A Marathon Measured in Hours and Decades
"It is a marathon activity," Dr. Zakir continues, explaining that the process can take up to 48 hours from ice collection to planting. "From the collection of the ice pieces from the source to the destination, the ice has to be kept continuously moving."
Site surveys and preparatory work are carried out during the summer months, but the actual grafting is timed for October. By then, temperatures above 4,000 metres have fallen below freezing, yet the first snowfalls have not yet arrived — a narrow window that allows the planted ice to bond with the substrate before winter accumulation begins. Once the nascent glacier endures several snow cycles, it gradually expands. If the graft takes hold, the new formation will begin to root and release meltwater after roughly ten years. A further decade of growth transforms it into a dependable water source for irrigation, livestock, and household use.
Derived Techniques: Ice Towers and Avalanche Harvesting
Two offshoots of the grafting tradition have emerged in recent decades. Ice towers — also called ice stupas because their conical silhouette echoes a Buddhist stupa — function as compact ice reservoirs. Developed in Ladakh, the method channels glacier meltwater through buried pipes and sprays it into sub-zero air, building a layered ice column whose reduced surface-area-to-volume ratio slows melting considerably. Avalanche harvesting, a more recent innovation, installs a mesh net within a narrow gorge to intercept and retain snow and ice thrown by avalanches, effectively converting a destructive force into a stored water resource.
Why It Matters Now
The Indus River basin sustains agriculture and drinking water for hundreds of millions downstream, from Gilgit-Baltistan through Punjab to the plains of Pakistan and beyond. As upstream glaciers retreat, the timing and volume of seasonal melt shift, squeezing the very window when farmers need water most. Glacier grafting does not reverse climate change, nor can it replace lost ice volume. What it offers is a locally governed, low-technology adaptation strategy: a way for highland communities to buy time, maintain water security, and preserve a cultural practice that has bound their relationship to the mountain landscape for centuries. In a region where the margin between abundance and scarcity is measured in metres of altitude and degrees of temperature, that margin is increasingly worth defending.
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