Himalayan Development Boom Puts 300,000 in Path of Potential Disasters

An escalating construction boom in the Himalayas has placed an estimated 300,000 people in areas vulnerable to potential disasters, according to a new study published in Scientific Reports. Researchers found that the amount of built-up land in high-risk zones across northern Nepal, parts of southeastern Tibet, and India's Uttarakhand region increased by approximately 45% between 2016 and 2023.

The development has been even more pronounced in areas particularly threatened by flooding from glacial lakes, where construction grew by nearly 78% during the same period. The study's authors suggest the actual number of people at risk could be significantly higher, as their analysis covered only specific territories.

These findings come in the wake of devastating floods in August that killed over 1,400 people and left thousands missing in Nepal. More recently, on October 11, flooding along the Budhi Gandaki river damaged 200 houses, destroyed five bridges, and left five people missing.

Increased Development in Vulnerable Zones

The research, conducted by scientists from the UK, Nepal, and India, examined areas up to 50 kilometers (30 miles) downstream from Himalayan rivers and around 1,360 glacial lakes. The study identified a substantial expansion of tourism facilities, infrastructure, and real estate in these hazardous regions.

Pokhara, a major tourism hub at the foot of the Himalayas, has experienced significant growth, driven by a massive increase in visitors. Mayor Dhana Raj Acharya acknowledged the challenge of managing the risks posed by the Seti Gandaki River, which flows through the city. He noted that many older buildings are situated very close to riverbanks, despite new regulations requiring greater setbacks.

Similar development has occurred in the Annapurna trekking region, with increased settlements along riverbanks that have been affected by recent floods and landslides. Local business owners express concern about the growing risks, with one homestay operator noting that recent disasters have drastically reduced tourist numbers.

Contributing Factors and Broader Risks

Experts suggest that tourism investors are promoting locations without adequately considering the inherent risks. Khagendra Poudel, a geographer at Tribhuvan University, stated that this mirrors development patterns in India's Himalayan valleys, which also host major pilgrimages.

The president of the Hotel Association Pokhara admitted that tourism businesses have expanded haphazardly in the region and called for greater awareness among entrepreneurs and investors regarding the potential for disasters.

The construction of hydropower plants has also significantly increased in areas along the Bhotekoshi and Trishuli rivers. C Scott Watson, a glaciologist at the University of Leeds and lead author of the study, warned that development decisions made today will have long-term consequences for disaster risk as river valleys become more populated.

The study defined buildings at risk as those within 50 vertical meters (164 feet) of a river or glacial lake. However, the catastrophic floods on August 26 demonstrated that even buildings further from the riverbanks could be inundated by rising water levels and debris.

Climate Change Amplifies Hazards

Scientists attribute the heightened risks to warming in the Himalayan region, which is occurring at twice the global rate. This accelerated melting of glaciers, icefields, and snowpacks destabilizes mountain slopes, often exacerbated by earthquakes, leading to severe downstream disasters. The melting also causes glacial lakes to expand and burst, triggering deadly floods.

Rising temperatures are also causing rain to fall at higher altitudes, where it previously only snowed, leading to slope failures and other hazards.

Nepal's Prime Minister Balendra Shah highlighted the severe impact of climate change on the country at the UN General Assembly, stating that Nepal is paying a "colossal price" for a crisis it did not create, with development gains threatened by disasters.

Challenges in Mitigation and Enforcement

While experts emphasize the need for early-warning systems and precautionary measures, implementing them faces significant challenges. Critics point to a lack of enforcement of building regulations on the ground, with development often proceeding haphazardly.

Urban planning expert Surya Raj Acharya noted that development has often disregarded safety safeguards, such as maintaining distances from riverbanks. He argued that the Himalayas, as a fragile ecosystem, require stricter planning and building regulations than other regions, yet these rules have been weak and poorly enforced.

Authorities in Nepal are taking steps to address the issue, with plans to ban new settlements within 15 meters (49 feet) of riverbanks in certain corridors and introduce similar rules elsewhere. However, officials acknowledge the difficulty of relocating established communities due to sentimental attachments to land and property.

In India's Uttarakhand state, activists report rampant construction despite zoning rules prohibiting development near riverbanks. The state government recently approved new floodplain zoning rules aimed at regulating land use and protecting infrastructure from flood damage.

Basanta Raj Adhikari, director of the Centre for Disaster Studies at Tribhuvan University, suggested that implementing risk-based insurance coverage could incentivize construction in safer areas. However, he cautioned that completely mitigating these threats remains a formidable challenge, especially as construction in the region continues unabated.