Siang Upper Multipurpose Project – Significance & Concerns – Explained Pointwise

The proposed Siang Upper Multipurpose Project (SUMP) in Arunachal Pradesh has recently triggered protests by sections of the indigenous Adi community over concerns surrounding displacement, loss of ancestral land, livelihoods and ecological degradation. While the project holds strategic significance for India’s energy and water security amid China’s upstream hydropower ambitions, it also raises important questions about environmental sustainability and indigenous rights. Understanding its significance and associated concerns is therefore essential.

What is the Siang Upper Multipurpose Project (SUMP)?

• The Siang Upper Multipurpose Project (SUMP) is a proposed mega hydropower and water-storage project on the Siang River in Arunachal Pradesh, aimed at generating electricity, regulating river flows, moderating floods and strengthening India’s strategic water security in the eastern Himalayan region.
• Location: Near Geku village in Upper Siang district, Arunachal Pradesh.
• Proposed capacity: Approximately 11,000–11,200 MW.
• Strategic status: Declared a National Project by the Government of India in 2008.

What are its major objectives?

What are its geographical, economic and geopolitical significance?

Geographical significance:

1. Strategic river location: The Siang is the principal headstream of the Brahmaputra in India, making the project important for managing water resources across the river basin.
2. Transboundary river system: The Siang originates in Tibet as the Yarlung Tsangpo, flows through Arunachal Pradesh and joins the Dibang and Lohit rivers to form the Brahmaputra in Assam.
3. Water resource management: The proposed reservoir can facilitate regulated water storage and river-flow management, subject to its final design and operating arrangements.
4. Flood management: Regulated releases may help moderate downstream flood peaks, although actual benefits would depend on reservoir capacity, operating rules and flood conditions.

Economic significance:

1. Hydropower generation: Its proposed capacity of approximately 11,200 MW can significantly enhance India’s renewable electricity generation capacity.
2. Energy security: It can reduce dependence on fossil fuels and support India’s transition towards a low-carbon economy.
3. Regional development: Construction and associated infrastructure can generate employment and stimulate economic activities in Arunachal Pradesh.
4. Infrastructure development: Development of roads, bridges and transmission infrastructure can improve connectivity in remote border areas.
5. Revenue generation: Electricity generation and associated economic activities can provide additional revenue to the State Government.
6. Industrial development: Reliable electricity supply can encourage investment in energy-intensive industries and improve economic opportunities in the Northeast.

Geopolitical significance:

1. Strategic response to China: The project is viewed as a strategic response to China’s proposed mega hydropower project on the lower reaches of the Yarlung Tsangpo in Tibet.
2. Downstream water security: It seeks to strengthen India’s capacity to store and regulate water amid uncertainties surrounding China’s upstream water-management activities.
3. Strategic leverage: Enhances India’s position as a significant downstream user of the Brahmaputra river system and strengthens its preparedness in transboundary water management.
4. Border security: Development of strategic infrastructure in Arunachal Pradesh can strengthen India’s presence and connectivity in a sensitive border region.
5. Regional stability: Highlights the need for greater transparency, hydrological data sharing and cooperation between India and China on transboundary rivers.

What are the major environmental concerns and concerns of indigenous communities associated with the SUMP?

Major environmental concerns:

1. Biodiversity loss: Large-scale submergence of forests and natural habitats may threaten rare, endangered and endemic species in the biodiversity-rich Eastern Himalayas.
2. Deforestation and habitat fragmentation: Construction of dams, roads, tunnels and other infrastructure may result in forest degradation and fragmentation of wildlife habitats.
3. Seismic vulnerability: The Siang Valley lies in a highly earthquake-prone Himalayan region (Seismic Zone V), raising concerns about dam safety and the consequences of reservoir-induced seismicity.
4. Landslides and geological instability: Large-scale excavation, tunnelling and construction may destabilise fragile mountain slopes, increasing landslide risks.
5. Alteration of river ecology: Changes in natural river flows, sediment transport and water temperature may affect aquatic biodiversity, fish migration and downstream ecosystems.
6. Downstream impacts: Altered sediment flows and river discharge may affect floodplains, wetlands, agriculture and river-dependent communities downstream.
7. Climate-related risks: Glacial lake outburst floods (GLOFs), extreme rainfall and changing Himalayan hydrology may pose additional risks to dam infrastructure and reservoir management.

Concerns of indigenous communities:

1. Displacement and rehabilitation: The proposed reservoir may submerge villages and displace indigenous populations, creating concerns regarding inadequate rehabilitation and resettlement.
2. Loss of ancestral land: The Adi community fears losing ancestral territories, customary land rights and traditional settlements that have been inhabited for generations.
3. Threat to cultural identity: The Siang River, locally revered as Ane Siang (Mother Siang), holds deep cultural and spiritual significance for the Adi community. Its alteration may disrupt traditional beliefs and practices.
4. Livelihood insecurity: Submergence of agricultural land, forests and fishing areas may threaten traditional livelihoods based on agriculture, fishing and forest resources.
5. Marginalisation of indigenous voices: Local communities have raised concerns about inadequate consultation and lack of Free, Prior and Informed Consent (FPIC) in project-related decisions.
6. Disruption of traditional institutions: The project may affect customary governance systems, community institutions and traditional land-management practices.
7. Militarisation of project areas: Deployment of security personnel during survey activities has raised concerns among sections of local communities regarding freedom of protest and meaningful democratic participation.

What measures should be adopted to ensure environmental sustainability and social acceptability of the SUMP?

1. Comprehensive Environmental Impact Assessment (EIA): Conduct independent and scientifically rigorous EIA, covering biodiversity, forests, river ecology and downstream impacts before approving construction.
2. Disaster risk management: Develop robust early-warning systems, emergency action plans and disaster preparedness mechanisms to address dam failures, GLOFs, landslides and extreme rainfall events.
3. Environmental flow maintenance: Ensure adequate ecological flows to preserve aquatic biodiversity, sediment transport and the natural functioning of downstream river ecosystems.
4. Meaningful community consultation: Engage affected villages, Gram Sabhas and traditional institutions such as the Adi Bane Kebang from the initial planning stage.
5. Free, Prior and Informed Consent (FPIC): Follow the principles of FPIC by ensuring that indigenous communities receive complete information and can participate meaningfully in decisions affecting their ancestral territories.
6. Comprehensive Social Impact Assessment (SIA): Identify the likely impact on settlements, livelihoods, cultural heritage and vulnerable households before taking any construction decision.
7. Recognition of tribal rights: Strictly implement applicable safeguards under the Forest Rights Act, 2006, and other relevant legal provisions protecting customary land and forest rights.
8. Protection of cultural heritage: Identify and preserve sacred sites, traditional landscapes, burial grounds and other places of cultural and spiritual significance.

Conclusion: The successful implementation of SUMP requires moving beyond a conventional infrastructure-centric approach towards inclusive and sustainable development. India’s strategic and energy interests must be balanced with ecological integrity, indigenous rights and meaningful community participation.