No new hydel projects on Ganga in Uttarakhand: Govt

The Union Government informed the Supreme Court it will not permit any new hydroelectric projects in the upper Ganga basin — specifically the Alaknanda and B...

What Happened

The Union Government informed the Supreme Court it will not permit any new hydroelectric projects in the upper Ganga basin — specifically the Alaknanda and Bhagirathi river systems in Uttarakhand — beyond the seven projects already under construction or commissioned.
The position was communicated through a joint affidavit submitted by the Ministries of Jal Shakti, Environment Forest and Climate Change, and Power, representing a consolidated executive stance.
The seven ongoing projects — including Tehri Stage-II (1,000 MW), Tapovan Vishnugad (520 MW), and Vishnugad Pipalkoti (444 MW) — were permitted on the basis of substantial prior financial and physical investment.
The decision underscores the policy shift toward Aviral Dhara (continuous and adequate flow) as the operational framework for Ganga management, as articulated by the National Mission for Clean Ganga (NMCG).
Ecological fragility, seismic risk, and biodiversity of the Himalayan river ecosystem were cited as primary grounds.

Static Topic Bridges

River Basin Management and the Ganga System

The Ganga is India's largest river system, originating at Gangotri glacier (Uttarakhand) and draining approximately 26% of India's land area. Its upper reaches — the Bhagirathi and Alaknanda — are the two principal headstreams that converge at Devprayag to form the Ganga proper. These segments flow through the Garhwal Himalayas, one of the world's most seismically active and ecologically sensitive zones (seismic Zone IV and V under the Bureau of Indian Standards classification).

The Bhagirathi originates from Gaumukh at the Gangotri glacier (~3,892 m); the Alaknanda originates from the Satopanth glacier near Badrinath.
Major Alaknanda tributaries: Mandakini (joining at Rudraprayag), Pindar (at Karnprayag), Nandakini (at Nandprayag), Dhauliganga (at Vishnuprayag) — forming the Panch Prayag system.
The Bhagirathi is designated as a Heritage Stretch under the Namami Gange programme — environmental flows are accorded priority over diversion for power generation in this stretch.
Run-of-the-river (RoR) projects, which do not create large reservoirs but divert water through tunnels, were the predominant hydropower model in this basin; even RoR projects cause stretch de-watering between diversion point and tailrace outfall.

Connection to this news: The moratorium on new projects reflects recognition that cumulative diversion from multiple run-of-river schemes — even without large dams — can fragment aquatic habitats, reduce downstream flows, and compromise the "Aviral Dhara" objective central to Ganga rejuvenation.

National Mission for Clean Ganga (NMCG) and Namami Gange Programme

The National Mission for Clean Ganga (NMCG) is a registered society under the Ministry of Jal Shakti mandated to prevent, control, and abate pollution in the Ganga while ensuring continuous adequate flow. Namami Gange is the flagship programme under NMCG, approved in June 2014 with an outlay of ₹20,000 crore (extended to March 2026 with a total outlay of ₹22,500 crore).

NMCG's vision rests on two pillars: Aviral Dhara (continuous, adequate, and natural flow) and Nirmal Dhara (pollution-free flow).
Aviral Dhara specifically requires maintenance of minimum ecological flows — defined as the minimum flow needed to sustain riverine ecosystems — at all times.
The Ministry of Jal Shakti notified minimum ecological flow norms for the Ganga's upper reaches: 2.5 cumecs (cubic metres per second) minimum at any point in the Bhagirathi, rising to higher volumes during specific seasons.
Namami Gange has 288+ projects across sewage treatment, river-front development, industrial effluent management, biodiversity conservation, and afforestation.
The Gangetic dolphin (Platanista gangetica), India's National Aquatic Animal, is a key indicator species for riverine ecosystem health; fragmentation from dams directly threatens its range.

Connection to this news: By opposing new hydropower projects, the three ministries are aligning hydropower policy with NMCG's Aviral Dhara mandate — acknowledging that energy generation objectives must yield to ecological flow requirements in the upper basin.

Himalayan Ecology and Seismic Vulnerability

The Western Himalayas, where the Alaknanda and Bhagirathi basins lie, represent one of the world's youngest mountain systems — tectonically active and prone to mass movements. Uttarakhand falls primarily in seismic Zones IV and V (high to very high damage risk). The 2013 Kedarnath disaster — triggered by a cloudburst interacting with a degraded catchment — demonstrated the amplifying role of construction activity on disaster risk in this terrain.

Himalayan geology is characterised by the Main Central Thrust (MCT) and the Main Boundary Thrust (MBT) — active fault systems that make underground tunnel excavation hazardous.
Tunnel construction for run-of-river projects can destabilise slopes (trigger landslides), alter underground drainage, and increase vulnerability to glacial lake outburst floods (GLOFs).
The Gangotri and Nanda Devi regions host glaciers that feed the headstreams; accelerated glacial retreat (documented at 22 metres per year for Gangotri glacier in recent decades) is reducing seasonal base flows, making ecological flow maintenance increasingly critical.
Protected areas in the upper basin: Valley of Flowers National Park and Nanda Devi National Park (both UNESCO World Heritage Sites), Gangotri National Park, Govind Pashu Vihar National Park — all in Uttarakhand; hydropower projects within or adjacent to these areas require additional wildlife clearance under the Wildlife (Protection) Act, 1972.

Connection to this news: The affidavit's reference to "ecological fragility" and "seismic vulnerability" directly invokes these geomorphological and ecological realities — the moratorium is grounded in the understanding that construction risks in this terrain are qualitatively different from those in peninsular India.

Key Facts & Data

Bhagirathi-Alaknanda confluence: Devprayag, Uttarakhand — where the Ganga officially begins.
Total hydropower projects proposed in Alaknanda-Bhagirathi basin before the 2013 halt: ~69 projects, ~9,000 MW aggregate capacity.
Seven projects allowed to continue — combined capacity: approximately 2,158.5 MW.
Namami Gange Programme financial outlay: ₹20,000 crore (2014–2021), extended at ₹22,500 crore (to March 2026).
NMCG nodal ministry: Ministry of Jal Shakti.
India's National Aquatic Animal: Gangetic Dolphin (Platanista gangetica).
Gangotri glacier retreat rate: approximately 22 metres per year (recent estimates).
UNESCO World Heritage Sites in upper basin: Valley of Flowers NP, Nanda Devi NP (jointly designated 1988, extended 2005).
Seismic zone classification of Uttarakhand: predominantly Zone IV and V (BIS IS 1893).
Minimum ecological flow notified for Bhagirathi upper stretch: 2.5 cumecs minimum at any point.