Why in the News?
India has rejected the “scare stories” spread by Pakistan and others about China building dams upstream on the Brahmaputra River, especially the big 60,000 MW Medog Hydropower Project in Tibet.
What is the significance of the Brahmaputra’s flow originating mostly in India?
- Major Contribution to River Flow: Although India has only about 34.2% of the Brahmaputra basin area, it contributes over 80% of the river’s total water flow due to higher rainfall and tributary inflows. Eg: The Indian basin receives an average annual rainfall of 2,371 mm, much higher than Tibet’s 300 mm.
- Flood Management Potential: Control over a major share of the river’s flow gives India better scope to design flood control infrastructure and storage systems to reduce monsoon-related disasters. Eg: Assam CM stated that reduced flow from China could help mitigate annual floods in Assam.
- Strengthened Riparian Rights and Development Planning: India’s dominant share in flow enhances its claim as a principal riparian state, empowering it to undertake hydropower and irrigation projects without heavy external dependency. Eg: India is developing hydropower projects like Dibang and Subansiri in Arunachal Pradesh based on its flow share.
| Note: A “riparian state” refers to a state or country that shares a river or stream border with another state or country. |
What about the Medog Hydropower Project?The Medog Hydropower Project is an ambitious and controversial initiative by China to construct the world’s largest hydropower dam on the Yarlung Tsangpo River in Tibet. With a planned capacity of 60,000 megawatts (MW) and an estimated cost of $137 billion, the project has significant environmental, geopolitical, and social implications for the region |
Why is China’s proposed Medog hydropower project raising concerns for India?
- Strategic Control Over Water Flow: China’s 60,000 MW Medog dam could allow manipulation of the Brahmaputra’s flow, risking reduced water in dry seasons or artificial floods during monsoons. Eg: Sudden releases from Chinese dams have previously caused flash floods in Arunachal Pradesh and Assam.
- Environmental and Seismic Hazards: The dam’s location in a seismic zone threatens biodiversity, increases landslide risks, and may disrupt sediment flow critical for downstream agriculture. Eg: Trapped sediments can reduce soil fertility, impacting farming in India and Bangladesh.
- Absence of Water-Sharing Agreements: China’s unilateral actions without consultation violate equitable sharing norms, worsening trust deficits. Eg: Unlike the Indus Treaty with Pakistan, no formal pact exists between India and China on the Brahmaputra.
What steps has India taken or proposed to utilise the Brahmaputra’s water potential?
- Development of Hydropower Projects: India is actively constructing and planning large hydropower projects in Arunachal Pradesh to harness the Brahmaputra’s energy potential and establish water-use rights. Eg: Projects like the Dibang Multipurpose Project (2880 MW) and Subansiri Lower Hydroelectric Project (2000 MW) are designed to generate clean energy and regulate river flow.
- Construction of Multipurpose Storage Reservoirs: India is focusing on creating dams and storage facilities to control floods, store monsoon water, and ensure water availability in dry seasons. Eg: The proposed Upper Siang project aims to store floodwaters and generate electricity while supporting irrigation and drinking water needs in the region.
- Promotion of Inland Waterways and River Navigation: The Brahmaputra is being developed as a key navigable waterway under India’s Act East Policy to boost trade and regional connectivity. Eg: The National Waterway-2 (NW-2) on the Brahmaputra facilitates cargo movement between Assam and Bangladesh, promoting economic use of the river.
Way forward:
- Bilateral Water-Sharing Framework: India and China should initiate dialogue to establish a formal transboundary water-sharing agreement, ensuring data transparency, flow regulation, and emergency notification mechanisms—similar to the Indus Waters Treaty.
- Regional Environmental Assessment Mechanism: Promote a joint environmental impact assessment (EIA) involving India, China, and Bangladesh under a multilateral platform like the UN or SAARC, to ensure sustainable and equitable river basin management.
Mains PYQ:
[UPSC 2013} What do you understand by run of the river hydroelectricity project? How is it different from any other hydroelectricity project?
Linkage: The articles talks about the Chinese infrastructure interventions on the Brahmaputra are “hydropower projects with minimal storage”. It also mentions the massive planned Medog project as the world’s largest hydropower facility, and India’s own Upper Siang Project which will generate power and serve as a buffer against flow variations. This question directly relates to a type of hydropower project pertinent to river development and control.
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