The project has stoked concerns about displacement and environmental impact downstream in India and Bangladesh.

Beijing has approved plans to dam a gorge in the Himalayas that is three times as deep as the Grand Canyon, despite concerns about the impact on Tibet and India.

The dam will be built at a huge gorge in the Himalayan reaches where the Brahmaputra River makes a huge U-turn to flow into Arunachal Pradesh and then to Bangladesh.