India’s Unplanned Dams And Tunnels Are Disrupting Himalayan Landscapes
The Tehri dam, situated in Garhwal, Uttarakhand, is the highest dam in India
Uttarakhand, referred to as the land of gods, is also known as the energy state of India. It is home to several fast-flowing rivers at high altitudes that serve as the perfect backdrop for harnessing energy from water to produce hydroelectric power.
In this state, the Tehri dam, situated in Garhwal, is the highest dam in India. The amalgamation of rivers and high mountains in this area is ideally suited to producing electricity for rural and urban areas through hydropower and other renewable energy sources such as solar and wind.
In the neighbouring state of Ladakh, the Zoji La is one of the highest mountain passes in the world. It’s surrounded by the rugged terrain of Trans-Himalayas, with cold desert slopes, snow-capped peaks and alpine meadows. This biodiverse region is home to snow leopards, Himalayan brown bears, wolves, Pallas cats, yaks and lynx.
Zoji La also serves as a gateway for the movement of Indian military troops, enabling a constant armed force presence at the Indo-Chinese border. The construction of the Zoji La tunnel, poised to become the longest tunnel in Asia, allows India to rapidly deploy troops near the border with China while claiming to promote economic development in rural areas. Existing roads remain blocked by snow for up to six months each year, so without the new tunnel, access is limited.
Its construction, however, uses extensive blasting and carving of the mountain slopes using dynamite, which disrupts fragile geological structures of the already unstable terrain, generating severe noise and air pollution, thereby putting wildlife at risk.
Hydropower harnesses the power of flowing water as it moves from higher to lower elevations. Through a series of turbines and generators, hydroelectric power plants convert the movement of water from rivers and waterfalls into electrical energy. This so-called “kinetic energy” contributes 14.3% of the global renewable energy mix.
However, development of hydropower projects and rapid urbanisation in the Indian Himalayas are actively degrading the environmental and ecological landscape, particularly in the ecologically sensitive, seismically active and fragile regions of Joshimath in Uttarakhand and Zoji La in Ladakh.
The construction of hydropower plants, along with associated railways, all-weather highways and tunnels across the Himalayan mountains, is being undertaken without adequate urban planning, design or implementation.
At an altitude of 1,800m in the Garhwal region, land is subsiding or sinking in the town of Joshimath, where more than 850 homes have been deemed as inhabitable due to cracks. Subsidence occurs naturally as a result of flash flooding, for example, but is also being accelerated by human activities, such as the construction of hydropower projects in this fragile, soft-slope area.
Satellite data shows that Joshimath sank by 5.4cm within 12 days between December 27, 2022 and January 8, 2023. Between April and November 2022, the town experienced a rapid subsidence of 9cm.
One 2024 study analysed land deformation in Joshimath using remote sensing data. The study found significant ground deformation during the year 2022–23, with the maximum subsidence in the north-western part of the town coinciding with the near completion of the Tapovan Vishnugad hydropower project in 2023. Another 2025 study highlights that hydropower projects, particularly the Tapovan Vishnugad plant near Joshimath, play a significant role in destabilising the region.
Dynamite and disaster risk
As part of my PhD research, I’ve been interviewing locals about how this is affecting them. “The subsidence in Joshimath is not solely the result of natural calamities,” said apple farmer Rivya Dimri, who once lived in the town but relocated to Lansdowne due to the inhospitable conditions of her ancestral home.
She believes that a significant part of the problem stems from dam construction, frequent tunnelling and blasting, plus the widespread deforestation that has taken place to accommodate infrastructure development.
Farmer Tanzong Le from Leh told me that “the government is prioritising military agendas over the safety and security of local communities and the ecology of Ladakh”. He believes that “the use of dynamite for blasting through mountains not only destabilises the geological foundations of the Trans-Himalayan mountains but also endangers wildlife and the surrounding natural environment, exacerbating vulnerability in these already sensitive mountain regions”.
The twin challenges of haphazard and unplanned infrastructure development in Joshimath and Zoji La represent two sides of the same coin: poorly executed infrastructure projects that prioritise economic, energy, military and geopolitical ambitions over the safeguarding of nature and communities. Hydropower plants, tunnels and highways may bring economic benefits and geopolitical advantages, but without urgent safeguards, India risks undermining the very mountains that protect its people, wildlife, ecosystems and borders.
(Published under Creative Commons from The Conversation)
