During some of our visits to China, we read and heard about the extensive scientific and engineering research undertaken before the construction of the Golmud–Lhasa railway across the Qinghai–Xizang Plateau. The railway represented a formidable undertaking in a high-altitude environment where permafrost, extreme climatic conditions, rugged terrain and difficult construction conditions demanded careful technical preparation. We were particularly impressed by the account of how Chinese scientists and engineers spent considerable time studying permafrost before construction began. The challenge was not simply to build a railway over frozen ground, but to understand how that ground would behave over time and how its stability could be maintained under a changing natural environment.
This story of scientific inquiry and engineering enterprise came vividly back to us when our team had the opportunity to ride the Golmud–Lhasa section of the Qinghai–Xizang Railway for the first time in September 2006, only two months after its inauguration. We were in Xizang in 2004 and had also returned to it in 2017 and 2019. The achievement deserves attention not only as a major accomplishment in global transport infrastructure, but also as a source of experience for understanding development economics in high-altitude regions. Its significance lies not merely in the construction of a railway, but in the knowledge, technologies, monitoring systems and maintenance practices required to keep such infrastructure functional in a demanding environment.
Bhotekoshi disaster
The severe disaster in Nepal’s Bhotekoshi region has renewed our interest in the scientific and engineering conditions that shape infrastructure in high-altitude environments. The experience also highlights the close relationship between mountains, rivers, geological processes and infrastructure. Against this background, knowledge and data exchange between Nepal and China is valuable. The two countries have different high-altitude geological and hydrological settings, and these differences themselves make comparative learning worthwhile. Scientific evidence, local geological knowledge and practical engineering experience could together contribute to a better understanding of how infrastructure interacts with land, water, ice and changing climatic conditions.
Nepal’s primary economic arteries and hydropower projects are heavily concentrated along steep, narrow river gorges like the Trishuli–Bhotekosi. This concentration exposes critical infrastructure and human settlements to catastrophic risks insidious-onset disasters, such as resultant ice tsunamis and debris flows. Because extreme Himalayan gradients can compress flood arrival times to mere minutes, conventional warning methods and delayed satellite observations are practically irrelevant for emergency evacuation. This hazard is compounded by the absence of an automated, real-time bilateral cross-border data-sharing regular mechanism between upstream catchments in Xizang and downstream operations in Nepal for detecting imminent surges.
Given China’s multi-dimensional capacity, Nepal can request China to take note of Nepal’s shared downstream data needs while China adaptively builds an upstream–downstream data-sharing mechanism that is expected to be formally established in the coming year. Since engineering riverbed infrastructure to withstand such unprecedented and colossal hydrodynamic forces is financially unfeasible for a least developed economy in the Global South, continuing to rely on narrow river valleys without instantaneous upstream and downstream warning mechanisms poses an unacceptable risk to both life and capital.
To secure its altitudinal mountain economy, Nepal must look beyond these hazardous river corridors and actively diversify its trade connectivity toward open, high-altitude passes such as Korala in Mustang. Sharing the broader, plateau-like topography of the Tibetan terrain, these routes can offer relatively safer alternatives by reducing exposure to devastating flash floods, ice tsunamis and landslide blockages inherent to narrow Himalayan gorges. The engineering challenges along these routes shift away from riverine disaster mitigation toward constructing roads, dry ports, customs and facilities in harsh, high-altitude climates.
By leveraging China’s proven technological expertise in high-altitude, cold-region construction, Nepal can fast-track the development of these alternative transit points—establishing safer, more reliable lifelines with Xizang that insulate national connectivity from the recurring disasters of vulnerable river V-shaped valleys. To say the least, this disaster has tremendously renewed our interest in the scientific and engineering conditions that shape infrastructure in high-altitude environments. The experience has also highlighted the close relationship between mountains, rivers, geological processes and infrastructure.
Data exchanges
Urgency of knowledge and data exchanges between Nepal and Xizang, China have significantly increased. The two countries have different high-altitude geological and hydrological settings, and these differences themselves make comparative learning worthwhile. Scientific evidence, local geological knowledge and practical engineering experience could together contribute to a better understanding of how infrastructure interacts with land, water, ice and changing climatic conditions.
China’s infrastructural development in high-altitude regions offers an opportunity to learn from an infrastructure system that has been operating for a longer period of time. Its experience may help researchers, engineers and policymakers in Nepal and China think about how high-altitude infrastructure can be designed, monitored, maintained and adapted to changing environmental conditions. Both countries could form a dedicated joint nodal point for this purpose.
(Gautam is secretary general of China Study Centre Nepal and Paudel is an engineering consultant).
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