In Arunachal Pradesh, forests are considered a part of the terrain before they are ever counted as forest cover. They shape how rivers behave, hold fragile slopes in place, and sustain village economies built around shifting cultivation, forest produce, and river systems.
Recent disclosures that a hydropower project could impact over 23.4 lakh trees have therefore travelled far beyond technical discussions.
The additional proposal that compensatory afforestation for this diversion may be undertaken in Madhya Pradesh has sharpened concerns on the ground. It brings two very different ecological landscapes into the same administrative calculation and treats them as if they can be balanced through paperwork.
The project sits within a wider hydropower push across Arunachal’s river basins, particularly along the Subansiri and Siang systems, where multiple dams have been planned over the years.
These rivers carry sediment, regulate flood cycles downstream, and sustain dense forest ecologies shaped by monsoon rainfall and seismic instability. Large dams in such terrain do more than add electricity to the grid.
They reshape river channels, affect slope behaviour, and gradually alter ecological patterns that communities have adapted to over generations.
Official references to lakhs of trees being affected indicate the scale of transformation envisioned in these valleys. Yet a Himalayan forest cannot be understood through numbers alone.
It is layered, biodiverse, and interdependent. Old-growth stands, riverine vegetation, and hill forests function together as ecological buffers. Their loss is spatially concentrated in one landscape.
Their replacement, when shifted hundreds of kilometres away into a different ecological zone, changes the meaning of compensation itself.
Clearance discussions around hydropower expansion in Arunachal, including projects such as the proposed 1,720 MW Kamala Hydroelectric Project in the Subansiri basin, involve the diversion of thousands of hectares of forest land and are expected to affect multiple villages across reservoir and infrastructure corridors.
Project documents indicate that compensatory afforestation for such large-scale diversion may be carried out outside the state, including in central Indian regions.
This administrative arrangement may satisfy procedural requirements, yet it leaves the ecological burden rooted in the original landscape.
Compensatory afforestation in Madhya Pradesh fits within existing forest clearance norms. From a regulatory standpoint, equivalent land can be identified elsewhere and planted. On paper, compliance is achieved.
On the ground, geography asserts itself. Forests in the eastern Himalayas operate within specific climatic, hydrological, and geological conditions. Plantations in central India grow under a different rainfall regime, soil profile, and biodiversity setting. The environmental functions performed by these two landscapes do not overlap in any meaningful way.
This gap between ecological reality and regulatory practice reveals how environmental governance operates in frontier regions. Infrastructure expansion in Arunachal Pradesh has long been framed through the language of energy security, border infrastructure, and regional development.
Hydropower is frequently presented as a pathway to fiscal growth in a state with limited industrial diversification. Policy discussions, therefore, foreground megawatt capacity, revenue prospects, and strategic relevance. Ecological consequences enter the discourse mainly through mitigation clauses embedded in clearance procedures.
Forest diversion linked to hydropower projects in Arunachal has been part of policy debates for more than a decade, especially in relation to reservoir submergence zones, access roads, and transmission lines.
Villages located along these river valleys face layered disruptions: loss of forest access, altered river flow, and long-term environmental change. These effects remain geographically contained even as the electricity generated is transmitted to consumption centres far removed from the project sites.
The decision to undertake compensatory plantations outside the Northeast introduces a further spatial imbalance. Ecological restoration becomes something that can be relocated for administrative ease, land availability, or faster implementation.
Over time, such practices create a pattern in which environmentally sensitive regions absorb concentrated ecological disruption while restorative measures are dispersed elsewhere. This pattern rarely features prominently in mainstream infrastructure debates, which tend to focus on timelines, capacity addition, and investment flows.
Arunachal Pradesh occupies a distinct ecological position within India’s environmental landscape. Its forests form part of one of the most biodiverse belts in the country, with high levels of endemism and complex ecological linkages across altitude gradients.
These forests regulate local microclimates, stabilise slopes in landslide-prone districts, and support river systems that flow into Assam and beyond. Their ecological role extends far beyond carbon storage or tree density. A plantation, even if extensive in area, cannot recreate these layered ecological functions within the original terrain.
For local communities, forest diversion is rarely an abstract environmental concern; it is a tangible issue that affects their daily lives. Forests are tied to subsistence practices, customary land systems, and cultural life.
River valleys across Upper Subansiri, Siang, and adjoining districts are inhabited landscapes with long histories of ecological adaptation. When large reservoirs alter these environments, the implications extend into mobility patterns, livelihood security, and social stability.
The environmental question, therefore, carries a lived dimension that cannot be captured through clearance metrics alone.
State and central authorities continue to emphasise the developmental promise of hydropower in Arunachal Pradesh. The argument carries weight in a region where infrastructure gaps remain visible and economic opportunities are uneven. Hydropower revenue, road construction, and associated investments are often presented as pathways to regional growth and fiscal strengthening. This orientation reflects a broader effort to integrate the Northeast more closely into national economic planning frameworks.
At the same time, the mitigation architecture surrounding such projects relies heavily on quantification. Forest land is measured, trees are counted, and compensatory plans are formalised through clearance documents.
This process offers administrative clarity and procedural order. Yet it compresses complex ecological systems into measurable units that can be offset through spatial substitution. The underlying assumption is that ecological loss in one geography can be compensated through ecological creation in another.
For frontier regions, this assumption carries deeper implications. The Northeast has historically supplied ecological resources to national development, from oil and forests to hydropower potential. Infrastructural and institutional investments in the region have followed uneven trajectories over the decades.
When environmental compensation linked to local ecological loss is geographically displaced, it reinforces the perception that the region functions primarily as a resource frontier within national planning priorities.
The selection of Madhya Pradesh for compensatory afforestation reflects administrative considerations, including land availability and ease of implementation. Yet ecological mismatch remains unavoidable.
Central Indian plantations evolve within a different biodiversity context and climatic rhythm. They cannot replicate the hydrological regulation provided by Himalayan forests or the slope-stabilising role played by dense hill vegetation in erosion-prone mountain districts.
Environmental assessments for hydropower projects in mountain regions also face the challenge of cumulative impact. Individual dams are often evaluated separately, even when located within the same river basin. Over time, cascading projects alter sediment flows, aquatic ecosystems, and downstream flood behaviour. These cumulative shifts become particularly significant in seismically active and ecologically fragile regions like Arunachal Pradesh, where landscape stability depends on intact forest cover and balanced river systems.
The present debate around the projected impact on 23.4 lakh trees, therefore, extends beyond a single project clearance. It brings into focus the broader question of how environmental federalism is practised in India.
Ecologically sensitive states host large infrastructure projects whose environmental consequences remain localised, while mitigation measures may be implemented in distant ecological zones. This spatial separation complicates accountability and weakens the connection between ecological loss and ecological restoration.
Policy responses could move towards mitigation strategies that remain rooted in the affected landscape. In-situ restoration, basin-level conservation planning, and long-term ecological monitoring within project zones would align mitigation more closely with environmental realities.
Such approaches demand sustained institutional coordination and deeper investment, which are often more complex than geographically displaced plantation drives.
There is also a need to rethink how environmental value is framed in frontier geographies. Forests in Arunachal Pradesh function as ecological infrastructure in their own right. They regulate water systems, stabilise terrain, and sustain biodiversity networks that extend across the eastern Himalayan region. Their diversion alters environmental baselines in ways that plantation statistics elsewhere cannot meaningfully address.
Hydropower expansion in Arunachal Pradesh sits at the intersection of development ambition and ecological fragility. Energy generation, regional revenue, and infrastructure expansion remain legitimate policy objectives.
The manner in which ecological costs are mitigated, however, will shape long-term environmental stability in the region. Administrative compliance alone cannot restore ecological balance in landscapes where environmental systems and human settlements are deeply interconnected.
As discussions around forest diversion and compensatory afforestation continue, the core issue returns to the geography of mitigation. Plantations in a distant state may fulfil regulatory obligations, yet they do not restore the ecological functions lost within the Himalayan forest systems.
The question before policymakers is one of spatial responsibility. Where ecological disruption occurs, restoration efforts grounded in the same landscape are more likely to sustain environmental credibility in ecologically sensitive regions such as Arunachal Pradesh.
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