Yarlung Tsangpo Dam Project on Brahmaputra

The Motuo Hydropower Station will be constructed in the Yarlung Tsangpo canyon — the deepest and longest canyon on land. The river rises in Tibet, enters India as the Siang and then becomes the Brahmaputra, finally reaching Bangladesh as the Jamuna before emptying into the Bay of Bengal.

Chinese Premier Li Qiang officially launched the construction phase. The project’s planned output would surpass even the Three Gorges Dam, making it the world’s most powerful hydroelectric facility. Plans call for five cascading dams with tunnels approximately 20 kilometers long to divert water for power generation.

The Yarlung Tsangpo runs more than 2,800 kilometers from the Tibetan Plateau to the Bay of Bengal. Its waters support farms, fisheries, and communities across the entire basin — serving as a lifeline for millions in Tibet, India, and Bangladesh.

The Motuo site sits amid steep gradients, heavy rainfall, and high seismic risk. The sharp drop in elevation offers exceptional hydropower potential — the canyon’s energy profile attracts dam engineers precisely because gravity does most of the work in generating electricity.

The Motuo project involves sophisticated engineering at an unprecedented scale:

• Five cascading dams along the canyon stretch
• Tunnels ~20 km long to divert water for power generation
• Channel straightening in some river sections to increase flow speed
• Triple the electricity output of the Three Gorges Dam
• Power primarily feeds eastern Chinese provinces, with some supply for Tibet

Leaders frame the project under “xidiandongsong” (西电东送) — literally meaning “sending western electricity east.” This policy aims to tap Tibet’s renewable resources for eastern industrial centers while reducing coal dependency.

The strategic benefits for China include:

• Carbon targets: Massive hydropower supports climate commitments
• Grid stability: Seasonal water storage balances peak electricity demand
• Economic development: Construction creates thousands of jobs
• Infrastructure boost: Improves transport and manufacturing in remote Tibet
• Water control: Upper-course control grants influence over downstream flows

The dam has triggered alarm bells in both India and Bangladesh:

India’s Concerns:

• Fear of reduced dry-season flows in the Brahmaputra
• Analysts warn of potential “water bomb” through sudden discharge
• Limited leverage since China controls the upper course
• National security implications for northeastern states

Bangladesh’s Concerns:

• Heavy reliance on steady flows for irrigation and drinking water
• Fishing communities depend on natural river patterns
• Seeking transparency and data-sharing agreements
• Vulnerable position as the furthest downstream nation

The environmental implications are severe and far-reaching:

• Habitat destruction: Reservoirs will flood biodiversity-rich valleys
• Species extinction: Rare endemic species face habitat loss
• Sediment disruption: Channel changes alter natural sediment loads
• Fish migration blocked: Dams create barriers for migratory species
• Water quality changes: Temperature and oxygen shifts harm aquatic life
• Downstream delta erosion: Reduced sediment threatens Bangladesh’s coast

The Motuo site presents exceptional safety challenges:

• High seismic risk: Located in an active earthquake zone
• Landslide potential: Steep terrain prone to mass movements
• Reservoir-induced seismicity: Large water bodies can trigger earthquakes
• Cascade failure risk: Five dams mean five potential failure points
• Downstream devastation: Dam failure would send catastrophic floods into India and Bangladesh

A major earthquake or landslide could trigger waves within the reservoir, potentially causing dam overtopping or structural failure — with devastating consequences for millions downstream.

Beyond geopolitics and environment, the human cost within Tibet deserves attention:

• Forced displacement: Communities face relocation as reservoirs flood valleys
• Livelihood loss: Farming and herding land submerged
• Sacred sites threatened: The Yarlung Tsangpo holds deep spiritual significance for Tibetans
• Suppressed dissent: Tibetan activists opposing similar projects have faced arrests
• Cultural erasure: Traditional ways of life disrupted permanently

For many Tibetans, the river is not just water — it’s a sacred lifeline connecting communities to their ancestral heritage.