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China's Mega Dams: Ambitions and Risks from the Three Gorges Dam to the Medog Dam

phoue

• 9 min read • --

An in-depth analysis of China’s grand ambitions to change the geopolitics of Asia using water as a weapon and the hidden risks behind it.

  • The engineering achievements and hidden dangers of two Chinese mega dams, the Three Gorges Dam and the Medog Dam.
  • How China exerts geopolitical influence (water hegemony) through rivers.
  • Realistic responses from the international community to mega dam projects.

Two Dams, Two Fears

The story begins with two massive rivers and the two dams that block them. One is the world’s largest dam, the Three Gorges Dam. During the record floods of 2020, satellite images showing the dam’s deformation fueled rumors of a ‘collapse.’ The Chinese government denied this, but the incident revealed the public’s deep anxiety about the hidden dangers beneath such structures and humanity’s arrogance in trying to control nature.

The other is the Medog Dam being constructed deep in the Himalayas on the Yarlung Tsangpo River. This dam is not just a power plant. Downstream country India refers to it as an “existential threat” and a type of “water bomb.” This is because China, controlling the upstream, could intentionally release or withhold water, wielding it as a geopolitical weapon that could determine the fate of downstream nations. This article traces the colossal clash of forces that shakes the future of Asia through these two dams.

View of the world’s largest Three Gorges Dam
View of the world's largest Three Gorges Dam

Three Gorges Dam: The Light and Shadow of Glory

The Three Gorges Dam symbolizes the Chinese Communist Party’s philosophy of conquering nature and seeking national development. It embodies both clear light and shadow as immense as its scale.

Great Vision: Flood Control, Power Generation, and Inland Development

The primary justification for the construction of the Three Gorges Dam was to control the destructive floods of the Yangtze River. In fact, after its completion, it protected 15 million people and vast agricultural lands, preventing enormous economic losses.

The second goal was massive power generation. As the world’s largest hydroelectric power station with a capacity of 22,500 MW, it has become a cornerstone of China’s energy security, replacing millions of tons of coal.

Lastly, the dam has become a key driver of the ‘Western Development’ strategy, creating a vast canal connecting inland cities like Chongqing to Shanghai, reducing logistics costs and developing the underdeveloped western regions.

Ecological Bill: A Chain Reaction of Destruction

However, the cost of taming nature has been severe. The dam blocked the migration routes of fish, leading to a 90% decline in the populations of major commercial fish species, ultimately driving species like the Yangtze River dolphin (Baiji) to extinction.

The slowed river water has accumulated pollutants, threatening to turn the reservoir into a ‘giant cesspool,’ while trapping massive amounts of sediment each year, causing serious problems. The filtered ‘hungry water’ erodes the riverbed downstream and devastates the coastline of the Shanghai delta, leading to long-term ecological bankruptcy. What surprised me most during my research was the choice to undermine the long-term ecosystem for short-term gains.

Cracked riverbed due to water scarcity
Cracked riverbed due to water scarcity

The Cost to Humanity and Shaky Foundations

At least 1.3 million people had to leave their homes for the dam’s construction. Insufficient compensation and corruption plunged the displaced into deeper poverty, and resistance was harshly suppressed.

Moreover, the enormous weight of the reservoir, amounting to 39.3 billion cubic meters, has pressed down on the crust, giving rise to a new risk known as ‘Reservoir-Induced Seismicity (RIS).’ Analyses indicate that seismic activity increased thirtyfold after the dam’s completion, constantly raising concerns about geological instability and the structural safety of the dam.

Medog Dam: The Geopolitical ‘Water Bomb’ of the Himalayas

If the Three Gorges Dam was a product of domestic ambition, the Medog Dam under construction in the Himalayas is a far more dangerous game that extends that ambition beyond borders.

An Unimaginable Scale

The planned capacity of the Medog Dam is 60 GW, nearly three times that of the Three Gorges Dam. The expected annual power generation is equivalent to the total electricity consumption of the entire United Kingdom. This project, set to become one of the most expensive infrastructure projects in human history, was officially approved in December 2024, aiming for commercial operation by 2033.

The ‘Great Bend’ of the Yarlung Tsangpo-Brahmaputra River
The 'Great Bend' of the Yarlung Tsangpo-Brahmaputra River

‘Building on Tofu’

The site of the Medog Dam is where the Indian and Eurasian plates collide, making it one of the most geologically active areas on Earth. One expert criticized it as “like building on tofu.” The risk of landslides due to earthquakes is extremely high, and if the dam were to collapse, the disaster would become an international catastrophe affecting India and Bangladesh.

A Side-by-Side Comparison: Three Gorges Dam vs. Medog Dam

The two dams show fundamental differences in scale and risk. While the issues of the Three Gorges Dam primarily remain within China, the Medog Dam’s influence crosses borders.

Feature Three Gorges Dam Medog Hydropower Station
Location Yichang, Hubei Province (Domestic River) Medog County, Tibet Autonomous Region (International River)
Geopolitical Context Domestic Energy/Flood Control Cross-Border, Conflict-Prone Areas
Capacity 22.5 GW 60 GW
Annual Generation About 100 TWh 300 TWh
Major Risks Earthquakes/Landslides from Reservoir Tectonic Plate Boundaries, Extreme Earthquake/Landslide Risks
Consequences of Failure National Catastrophe International Catastrophe (Including India and Bangladesh)

Using Rivers as Weapons: China’s ‘Water Hegemony’ Strategy

China’s dam construction is not merely an infrastructure project but part of a strategy of ‘water hegemony’ aimed at securing geopolitical influence by controlling river flows. This strategy has already been realized on the Mekong River.

Chinese dams regulating water levels in the Mekong River basin.
Chinese dams regulating water levels in the Mekong River basin.

China has built over 12 dams upstream on the Mekong River, controlling the flow of water. In 2019, when China blocked water upstream, downstream countries like Thailand and Cambodia experienced severe droughts. This precedent clearly illustrates the threat the Medog Dam could pose to India and Bangladesh. India is attempting to build counter-dams, but this leads to a ‘dam dilemma’ where they must bear enormous costs and environmental destruction.

Dams and the Belt and Road Initiative: Expanding Influence through Debt

China’s mega dam projects are deeply connected to President Xi Jinping’s global strategy, the ‘Belt and Road Initiative (BRI).’ The technology and capital accumulated through the Three Gorges Dam are now being exported worldwide via the BRI.

China’s Belt and Road Initiative concept map
China's Belt and Road Initiative concept map

However, this often traps partner countries in a ‘debt trap.’ Laos, in its attempt to become ’the battery of Asia,’ has found itself buried in debt, while Ecuador had to sell its oil assets at a loss to pay for dam construction costs. This shows a consistent pattern of China pursuing its economic and strategic interests through infrastructure.

How to Stand Against the God of Rivers: A Three-Step Response Strategy

The likelihood of China halting the Medog Dam is slim. With climate change as an additional variable, the risks are further amplified. So how should downstream countries and the international community respond? What can we do in this massive flow?

  1. We must monitor and expose. Like the Stimson Center’s ‘Mekong Dam Monitor,’ we should independently monitor dam activities using satellite technology and transparently disclose data to exert international pressure.
  2. We must unite and strengthen legal frameworks. India and Bangladesh should collaborate to demand a legally binding water-sharing treaty and diplomatically push for China to join the UN Water Convention.
  3. We must invest in our own resilience. If we cannot stop China’s actions, we must focus on mitigating their impacts. This includes building counter-dams, improving flood management systems, developing drought-resistant agricultural technologies, and restoring delta ecosystems.

Conclusion: Stopping a Zero-Sum Game

China’s mega dam projects are not merely energy or flood control initiatives but a complex geopolitical game. The key points of this game are as follows:

  • Key Summary 1: China’s mega dams symbolize an ambition to control nature, but they come with a costly bill of serious ecological destruction and social sacrifice.
  • Key Summary 2: The Medog Dam represents the pinnacle of the ‘water hegemony’ strategy, which seeks to weaponize water to determine the fate of neighboring countries, potentially leading to international catastrophe.
  • Key Summary 3: Rather than military confrontation, transparent data disclosure, pressure through international law, and building resilience among downstream countries are the most realistic paths to confront this massive challenge.

This issue is no longer confined to specific countries or regions. The flow of rivers knows no borders. I hope this article helps to understand the seriousness of the Chinese mega dam issue and serves as an opportunity to reflect on the role of the international community in achieving a sustainable future.

References
#Chinese Mega Dams#Three Gorges Dam#Medog Dam#Water Hegemony#Geopolitics#Belt and Road Initiative#Environmental Issues

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