UPSC Mains Answer: The interlinking of rivers can provide viable solutions to the multi-dimensional inter-related problems of droughts, floods and interrupted navigation. Critically examine.

Difficulty Level: Hard

Sub-category: Geography (Water Resources and Management)

Introduction

The interlinking of rivers (ILR) project, conceptualised to address India’s water scarcity and flood management challenges, proposes a network of canals and reservoirs to transfer surplus water from water-rich basins to deficit regions. While it promises multidimensional benefits, its feasibility and ecological impact warrant critical examination.

Body

Potential Benefits:

Drought Mitigation

ILR aims to alleviate water scarcity in arid regions like Rajasthan and Tamil Nadu by diverting surplus water from the Ganga and Brahmaputra basins, ensuring agricultural and drinking water security.

Flood Control

By regulating excess water during monsoons, ILR can reduce flood devastation in states like Bihar and Assam, saving lives and infrastructure.

Navigation and Economy

Inland waterways can be revitalised, reducing transportation costs and boosting trade, as seen in the National Waterway-1 (Ganga-Bhagirathi-Hooghly).

Hydroelectric Power

The project could generate additional hydropower, contributing to India’s renewable energy goals.

Critical Challenges

Ecological Disruption

Large-scale river interlinking may alter natural flow regimes, endangering aquatic biodiversity and disrupting sediment transport, as witnessed in the Farakka Barrage’s impact on the Sundarbans.

Displacement and Rehabilitation

Construction of dams and canals may displace indigenous communities, raising socio-political concerns, similar to the Narmada Bachao Andolan.

Inter-State Conflicts

Water-sharing disputes, such as the Cauvery and Krishna river conflicts, could intensify due to unilateral diversion of water.

Financial Viability

The estimated cost of ₹10 lakh crore (2019) raises questions about economic sustainability and opportunity costs for alternative water management strategies like rainwater harvesting.

Balanced Perspective

While ILR offers transformative potential, its implementation must prioritise environmental impact assessments, stakeholder consultations, and adaptive management to mitigate adverse effects. Decentralised solutions like watershed management and groundwater recharge should complement large-scale projects.

Conclusion

The interlinking of rivers presents a double-edged sword—offering solutions to droughts, floods, and navigation woes while posing ecological and socio-political risks. A nuanced, evidence-based approach, integrating scientific, economic, and ethical considerations, is imperative to harness its benefits sustainably. India must strike a balance between ambition and prudence to ensure water security for future generations.