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Relevance: GS-II (IR & Governance) | GS-III (Environment) | Source: The Hindu

Damming the Siang: Why a Strategic Buffer Against China is Sparking Local Protests

The Context: The proposed 11,000 MW Siang Upper Multipurpose Project (SUMP) in Arunachal Pradesh has sparked intense protests from the local Adi tribe, who fear it will flood 27 villages and affect at least 40 overall. While the government sees the mega-dam as a vital shield against China’s massive upstream Medog dam, locals see it as a threat to their homes, farms, and culture.

1. The Ground Reality: Project Plans vs. Local Fears

  • Early Stage: Planned by NHPC on the Siang river (the Brahmaputra in Arunachal Pradesh), this 280–300 metre tall dam is currently only at the Pre-Feasibility Report (PFR) stage—an early safety study before full environmental and dam-break checks happen.
  • Why Locals are Protesting: Adi villagers warn the reservoir will drown paddy fields, orange orchards, and ancestral burial grounds, suggesting smaller dams on tributaries instead.
  • Escalating Tensions: Villagers allege that consent signatures were forced by threatening to stop welfare benefits. Protests turned violent in October with a police lathi-charge, arrests under the state’s unlawful activities law (APUAPA), and NHPC offices being set on fire in Pasighat.

2. Core Concepts: Live Storage & Water Politics

  • Live Storage (9.2 BCM): The usable water in a dam that can actually be released (excluding the unusable bottom layer). For the State, holding this 9.2 billion cubic metres of water to control floods is the main goal, while generating 11,000 MW of power is secondary.
  • The China ‘Medog’ Threat: China plans to build a colossal 60,000 MW dam upstream at Medog. India wants the Siang dam’s huge storage to act as a cushion—absorbing sudden water releases from China or releasing stored water to protect downstream Assam.
  • Global Water Disputes: Upstream-downstream conflicts are rising globally—from Ethiopia’s Grand Ethiopian Renaissance Dam (GERD) on the Nile (contested by Egypt and Sudan) to India placing the 1960 Indus Waters Treaty in “abeyance” after the April 2025 Pahalgam attack.

Value Box: Geography, Culture & Treaties
Siang River Journey Starts as the Yarlung Tsangpo in Tibet, bends sharply around the Namcha Barwa peak, enters Arunachal Pradesh as the Siang, and joins the Dibang and Lohit in Assam to form the Brahmaputra.
Adi Tribe & The Kebang An indigenous group in Arunachal Pradesh governed by the Kebang—a traditional democratic village council. Bypassing the Kebang for land consent triggers deep local resistance.
Indus Waters Treaty (1960) Gave the Eastern Rivers (Ravi, Beas, Sutlej) to India and the Western Rivers (Indus, Jhelum, Chenab) mostly to Pakistan. In August 2026, a Court of Arbitration (which India does not recognise) ruled that India’s suspension of the treaty was unauthorised.

Practice MCQ

Q. Consider the following statements regarding transboundary rivers and indigenous institutions in the news:

  1. ‘Kebang’ is the traditional democratic village council of the Adi community in Arunachal Pradesh.
  2. The Grand Ethiopian Renaissance Dam (GERD), often seen in the news due to downstream water disputes with Egypt, is built on the White Nile river.
  3. Under the Indus Waters Treaty of 1960, the waters of the Eastern rivers (Ravi, Beas, and Sutlej) were allocated to India.

Which of the statements given above is/are correct?

(a) 1 only     (b) 1 and 3 only     (c) 2 and 3 only     (d) 1, 2 and 3

Answer: (b) 1 and 3 only
Hint: Statements 1 and 3 are correct. Statement 2 is incorrect because the GERD is built on the Blue Nile river (not the White Nile) in Ethiopia.
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