Upstream dam-building on trans-boundary rivers creates a security dilemma for India. Critically analyse India's response with reference to the Brahmaputra basin.

China has approved a mega hydropower project on the lower Yarlung Tsangpo (Medog), just upstream of Arunachal Pradesh [1]. This leaves India facing a classic lower-riparian dilemma. With no water-sharing treaty, it can neither control the river's flow nor check China's intent. India has responded through diplomacy and through dam-building, and both have worked only in part.

India's response: strengths

• Diplomatic engagement: India says it monitors the Chinese project closely. It has raised its downstream concerns through the Expert Level Mechanism (2006) and diplomatic channels [1].
• Flood-season data: a 2013 MoU extended China's supply of Brahmaputra hydrological data from 15 May to 15 October [2]. This data feeds flood forecasting in Assam.
• Counter-storage: the Siang Upper Multipurpose Project (SUMP) proposes about 9.2 BCM of live storage for flood moderation [3]. It is meant as a buffer against sudden releases or flow cuts from Medog [4].

India's response: weaknesses

• Cooperation is not binding: the MoUs are seasonal, need renewal and cover only data. Even data supply now needs a fresh ELM meeting to resume [1]. India has no rights over the flow itself.
• Buffer and power pull against each other: a reservoir kept partly empty to absorb surges cannot also stay full for maximum power. The government has not said which comes first.
• It alienates the frontier community: the Adi allege "deceit, force, and threats" in obtaining consent for the feasibility study. Protesters estimate 27 villages would be submerged, and Central forces now man check posts [5]. A security project that turns border citizens against the State works against its own aim.
• Coercion causes delay: the Lower Subansiri project stalled from December 2011 to October 2019 because of local agitations [6].
• Ecological risk moves downstream: a large reservoir in a seismic zone adds hazard for the Assam plains. Impacts are also assessed one dam at a time, not for the whole basin.

India's response rightly recognises the threat. But abroad it relies on data deals that do not bind China, and at home on contested mega-dams. A lasting strategy should press for a binding data-and-notification framework with China, and commission a cumulative impact assessment of the whole basin. It must also secure the Adi's free, prior and informed consent through their customary councils, as the Niyamgiri judgment (2013) did for gram sabhas. Water security built with the frontier community, not against it, serves both Article 21 and SDG 6.