Inside China’s Controversial $167 Billion Mega-Dam

The Yarlung Tsangpo/Brahmaputra Hydropower Project: A Detailed Overview

Key Concepts: Yarlung Tsangpo River (Upper Brahmaputra), Great Bend, Yaxia/Lower Yarlung Hydropower Project, Hydropower Diversion, Tectonic Activity, Geopolitical Implications, Energy Security, Carbon Neutrality, Mekong River Dams.

I. Introduction: A Project of Unprecedented Scale

For decades, the Three Gorges Dam has symbolized China’s engineering prowess, even measurably altering Earth’s rotation by 0.06 microseconds. Generating enough electricity to power over 70 million homes annually, China is now planning an even more ambitious project on the Yarlung Tsangpo River, located on the edge of the Himalayas. This project, estimated to cost 1.2 trillion yuan (approximately $167 billion USD) – four to five times the cost of the Three Gorges Dam – is described as the hydropower equivalent of a mission to Mars, aiming for 60 gigawatts of installed capacity and 300 billion kilowatt-hours of annual generation, exceeding the UK’s entire yearly energy consumption and tripling the output of the Three Gorges Dam.

II. The Yarlung Tsangpo River and the Great Bend

The Yarlung Tsangpo River originates from glacial melt in the Himalayas, flowing over 1,000 kilometers across the Tibetan Plateau. Its defining feature is “The Great Bend,” a dramatic 180-degree turn where the river descends approximately 2,000 meters in elevation over a 50-kilometer stretch. This creates the world’s deepest and steepest canyon, significantly larger than the Grand Canyon. This extreme elevation drop provides immense hydropower potential. After the Great Bend, the river enters India as the Brahmaputra and eventually empties into the Bay of Bengal. Construction of the Yaxia (Lower Yarlung) Hydropower Project officially began in July 2025, in a remote area only accessible by road since 2013.

III. Project Design: A Diversion-Based Approach

Unlike traditional dams, the Yaxia project is believed to be a diversion-based hydropower system. This involves a series of hydropower stations along the river, potentially including:

• Upstream Dam & Reservoir: To regulate water flow.
• Diversion Dam at the Great Bend: To divert water through underground tunnels.
• Underground Tunnels & Turbines: A network of tunnels and turbines within the mountains to generate electricity.
• Re-regulation Dam: At the bottom of the gorge to stabilize flow before the river continues downstream.

This system aims to divert a volume of water comparable to the discharge of a major European river like the Rhine. The concept has been tested at the Jinping Dams, but the scale of the Yaxia project is unprecedented.

IV. Economic and Strategic Rationale

The project is not solely about power generation; it’s a core component of China’s national economic strategy. The Chinese government views large-scale infrastructure projects as a means to address economic challenges. The dam is expected to stimulate sectors like construction, cement, and steel, providing a critical demand boost during a period of slower economic growth. Furthermore, it supports China’s goal of achieving net-zero emissions by 2060, potentially reducing carbon emissions by 300 million tons annually by replacing fossil fuel power. It also enhances China’s energy security by increasing domestic power generation. As stated, “China is an engineering state…having an engineering society in China has done is that it’s a government that likes to build its way out of problems.”

V. Engineering Challenges and Environmental Risks

Building this project presents significant engineering challenges due to the remote location and geologically unstable environment. The region is a convergence point for six tectonic plates, making it highly prone to earthquakes, including a magnitude 8.6 earthquake in 1950. Potential risks include landslides, freezing conditions, equipment malfunctions, and long-term environmental impacts like seepage of plastic and concrete into the surrounding environment. The Three Gorges Dam experience, which involved the relocation of 1.3 million people and habitat damage, serves as a cautionary tale.

VI. Downstream Impacts and Geopolitical Concerns

The project raises concerns about its potential impact on downstream countries, particularly India and Bangladesh, which rely on the Brahmaputra River for fertile sediment and water resources. Approximately 40% of the Brahmaputra’s sediment originates from the Yarlung Tsangpo’s gorge. Both India and Bangladesh have requested more information from China regarding potential downstream effects and assurances that the river’s flow will not be significantly impacted. There are fears that China could “weaponize” the water for political leverage, prompting India to construct its own mega-dam on the Upper Siang River. China’s lack of transparency regarding its dam projects on the Mekong River – where it doesn’t share design or operational information with downstream countries – has exacerbated these concerns. The Mekong experience demonstrates how dams can disrupt river ecosystems, reduce flood pulses vital for agriculture and fisheries, and negatively impact livelihoods.

VII. The Mekong River Precedent

China’s 12 dams on the Mekong River have already reshaped the river and the lives of tens of millions of people downstream. These dams reduce peak flows, impacting fisheries and agricultural production. During the dry season, water releases can cause abnormally high river levels, leading to livestock loss, equipment damage, and agricultural devastation. This lack of data sharing and transparency has fueled distrust and concerns among Mekong River basin countries.

VIII. The Need for Cooperation and Transparency

The video emphasizes the importance of knowledge exchange and cooperation across borders to mitigate potential conflicts and ensure sustainable water management. “Without knowledge exchange and cooperation across that border, then it’s really easy to play on people’s fears.” Decisions should be based on quantifiable, objective data, and stakeholders – including those whose livelihoods depend on the river – should have a voice in the process.

Conclusion:

The Yarlung Tsangpo/Brahmaputra Hydropower Project represents a monumental undertaking with the potential to reshape energy landscapes and geopolitical dynamics. While offering significant benefits in terms of clean energy production and economic growth for China, it also presents substantial engineering challenges, environmental risks, and potential downstream impacts. The project’s success hinges on transparency, international cooperation, and a commitment to sustainable water management practices to avoid exacerbating existing tensions and ensure the long-term health of the river basin. The project is framed not as a villainous act, but as a demonstration of China’s engineering capabilities and commitment to carbon neutrality, with the potential to serve as a model for future large-scale hydropower projects globally.