Altered River Ecosystems
The dam will change the river's natural flow regime, affecting sediment transport and water temperature. These changes disrupt aquatic habitats, which many fish and other species depend on. Over years, this can reduce biodiversity and affect fisheries crucial for local communities.
Soil and Vegetation Effects
Waterlogging upstream and reduced flows downstream might degrade soils, causing erosion or loss of fertile land. Vegetation patterns will shift as water availability changes, impacting both wildlife habitats and local farmers who rely on predictable seasons.
Wildlife Displacement
The dam reservoir inundates large tracts of forest, displacing animals like the Hornbill and various mammals native to Arunachal Pradesh. Fragmented habitats may lead to reduced genetic diversity and increased human-wildlife conflicts as animals search for new areas.
Greenhouse Gas Emissions
Flooded vegetation decomposes underwater, releasing methane, a potent greenhouse gas. Although hydroelectricity reduces fossil fuel use, these emissions can accumulate over time and contribute to climate effects locally and beyond.
Social-Ecological Feedbacks
Communities may alter land use and resource management in response to environmental changes, which can exacerbate degradation. Long-term monitoring beyond initial impact assessments is essential to track these evolving dynamics and mitigate adverse outcomes.
