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  • » 05/01/2010, 00.00


    China to build dams in quake-prone Tibetan regions

    Tensions are rising over Beijing’s decision to build a dam on the Yarlung Zangbo-Brahmaputra River. Geologists slam the decision because of the strong danger of earthquakes in the area. India also fears that China might be planning to divert the river’s waters towards its territory. China appears set to go.
    Beijing (AsiaNews/Agencies) – Powerful earthquakes and ethnic tensions in a remote region of Tibet pose a threat to the construction of the Zangmu hydroelectric project on the Yarlung River Zangbo. The project itself is a source of tensions with India, which is concerned that the damming the river, known as the Brahmaputra in India, could harm downstream flows in one of Asia's most economically vital waterways.

    The Zangmu Dam is the first of five planned for the 100-kilometre Jiacha Canyon (pictured), which is southeast of Tibet’s capital of Lhasa. However, geologists have said that the area is prone to earthquakes.

    “Huge mountains suddenly surged from a piece of flat land, forming two almost vertical walls to the horizon,” geologist Yang Yong told the South China Morning Post. Thus, the canyon “is fresh evidence of violent geological movement. I cannot imagine a more dangerous spot to build dams.”

    "The Jiacha Canyon sits right above an enormous, active fault. It is exactly where the tectonic plates of India and Eurasia meet."

    "The canyon has, no doubt, trapped an enormous amount of hydroelectric resources," Yang said. “But the site is not safe. Huge earthquakes have struck the region in recent history. Landslides occur often. Such natural disasters not only threaten the safety of the dam—they could be intensified or even created by the dam, which, with its large water supply, could change the delicate geological balance of a large region.”

    Some seismologists warn that China may have entered a period of more frequent seismic activity, citing the magnitude-8 earthquake that struck Sichuan in May 2008, killing nearly 88,000 people, and the 7.1-magnitude quake that hit Yushu prefecture, Qinghai, two weeks ago.

    The five hydroelectric dams in the Jiacha Canyon are only part of a more extensive plan. The largest of them will be in the Yarlung Zangbo Canyon, and will have a capacity of more than 40,000 megawatts—more than twice the maximum capacity of the Three Gorges Dam.

    What is more, local residents can be expected to oppose the dam. The Shannan district lies to the west of the Jiacha Canyon and is Tibet’s most fertile region. Building a large dam in the canyon would force some native Tibetan communities to move from the land where they have lived for centuries.

    Beijing has countered such arguments saying that the dams would bring security and great economic development to the benefit of LL residents. It noted that power shortages were the biggest obstacle to development in Tibet today. Even Lhasa residents have to endure electricity rationing almost every year.

    In the meantime, the dam project is highly controversial in India. Unofficial sources in India have accused China of not only planning to dam the Brahmaputra to generate power, but also of diverting its waters to irrigate arid regions, including the Gobi Desert, which is believed to be expanding by 3 kilometres per year.

    Some in India believe that China in fact wants to build a “Western Canal” to carry Brahmaputra waters to the dying Yellow River to augment water supplies to Shaanxi, Hebel, Beijing and Tianjin.

    At stake is also the possibility of harnessing the hydropower potential of the river’s tributaries like the Siang, Subansiri and Lohit.

    Bangladesh is also an interested party in the matter because it depends on the Brahmaputra for its water.

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    See also

    18/11/2010 CHINA – INDIA
    China-India bound to clash over dams on the Brahmaputra
    China’s plans to build a dam on the Yarlung Zangbo (Brahmaputra) River continue. Experts think Beijing is planning dozens of dams in Tibet to power the economies rich economies of southern China or sell abroad.

    06/09/2010 CHINA – TIBET
    A five-star hotel planned for the entrance of a Tibetan canyon
    The Yarlung Tsangpo (Brahmaputra) River flows in the canyon. The vice president of the Tibet tourist company announces the project. However, breathtaking views hide dangers such avalanches and flash floods.

    11/07/2011 INDIA – CHINA – TIBET
    The difficult relationship between India and China over the Brahmaputra River
    India is concerned about Chinese plans to divert the river’s waters. So far, Beijing has avoided discussing the issue with New Delhi. An expert talks about the thorny issue, which could lead to open conflict or renewed cooperation between the two nations.

    18/06/2011 INDIA - BANGLADESH - CHINA
    Chinese dams on the Brahmaputra threaten lives of Indians and Bangladeshis
    China wants to launch an anti-drought project to save region of Xinjiang. Despite Beijing’s guarantees, India and Bangladesh fear the diversion of the river will have a negative impact on the ecosystem.

    04/01/2010 CHINA
    Shaanxi: 150,000 litres of diesel fuel flowing towards the Yellow River
    Provincial authorities sound the alarm after fuel spills from pipeline owned by state oil company. The central government orders action to save local drinking water.

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