Three Gorges Dam vs. Narmada Dam: A Comparative Analysis

Introduction

China and India, two fast-growing economies of the world, are at the center of controversy relating to the construction of large dams. China's Three Gorges Dam, built on the mighty Yangtze River — the third longest river in the world — and the Sardar Sarovar Dam, constructed on the Narmada River, the fifth largest river in India, have both drawn severe criticism from environmental and social activists. As the world's most populous nations, these two Asian giants are engaged in a desperate struggle to meet the growing energy requirements driven by their surging economies. Power generation and agricultural production are two critical concerns as both countries emerge as global economic powerhouses.

The increasing global shift toward a low-carbon economy and the mounting pressure on China and India to curb carbon emissions have forced these countries to seriously consider non-coal energy sources. Hydroelectric power generated by large dams is therefore an important alternative energy source for both nations. Dams also help control flooding, thereby saving millions of lives and billions of dollars in property damage. However, their construction raises serious environmental and social concerns. A brief overview of the economic and environmental challenges involved in building the Three Gorges Dam and the Sardar Sarovar Dam sheds light on the controversies surrounding these projects.

The Three Gorges Dam Project

The idea of a dam on the Yangtze River dates back to 1919, when national leader Sun Yat-sen first proposed the project. The Yangtze River has a fearsome reputation, and China has been struck by devastating floods every few years, causing enormous loss of life. The August 1998 flood, for instance, claimed 3,000 lives and displaced more than 2 million people. The Three Gorges Dam was envisioned specifically to contain such natural disasters. In 1992, the state environmental agency approved the project; construction commenced in 1994, and by October 2008 the last of the 26 generators was operational.

At 607 feet high and 1.4 miles long, the Three Gorges Dam is considered an engineering marvel and stands as the world's largest hydropower plant, with a total installed capacity of 18,200 MW. Built at a cost of approximately $25 billion, it is also one of the most expensive construction projects ever undertaken. When fully operational, the dam's generators can produce energy equivalent to that of 18 nuclear power plants, meeting at least 10% of China's electricity needs. Much of the power generated is supplied to China's eastern provinces, with Shanghai being among the greatest beneficiaries. The dam also features some of the largest ship locks in the world, creating a significant boost for large-vessel commerce along the Yangtze. Nevertheless, these remarkable achievements are accompanied by serious environmental concerns.

One of the direct consequences of the dam's construction and water retention is the creation of a large submergence zone, which typically encompasses hundreds of villages. It is estimated that over 36,000 square miles have been inundated as water levels in the Yangtze rose. Two major cities and 140 towns were submerged. The resettlement of people who had lived in these zones for generations was one of the government's most significant logistical tasks; approximately 1.3 million people were relocated to newly constructed towns. Cultures and communities were disrupted as families were compelled to leave their ancestral homelands.

Environmental Impact of the Three Gorges Dam

Another major loss caused by the rising waters is the submergence of more than 1,200 archaeological sites located throughout the Yangtze River valleys. Although the government excavated and relocated hundreds of artifacts from these zones before inundation, a significant number of invaluable antiquities are now believed to be permanently underwater.

The dam has affected the entire regional ecosystem, with far-reaching consequences. Fishermen upstream report that altered water levels have damaged fish populations. Further east, Shanghai, while benefiting from dam-generated electricity, has experienced a reduction in freshwater supply for drinking. Increasing silt deposits, heightened seismic activity, and frequent landslides in areas surrounding the dam are now manifesting as tangible repercussions of the project. Because some landslides have occurred in previously designated relocation zones, the government has been forced to identify entirely new resettlement areas. Chinese authorities, who had initially been tight-lipped about environmental impacts, have now openly acknowledged that the "Three Gorges Dam project has caused an array of ecological ills, including more frequent landslides and pollution, and if preventive measures are not taken, there could be an environmental 'catastrophe.'" (Peter H. Gleick, 2009)

Conclusion

China and India represent two fast-growing and dynamic global economies of the 21st century. Both countries have a huge population and increasing energy demands to sustain growth at the current rate. While the Three Gorges project was undertaken primarily to serve the energy needs of China's rapidly growing eastern cities and central states, the Narmada project's main focus was to supply water for the vast agricultural regions of Gujarat and Maharashtra and to provide drinking water to the drought-prone areas of Rajasthan.