Revision summary
ILR claims to send flood water to drought land and to aid boats. Ken–Betwa is the test case and already hits Panna ecology. Flood, drought, and navigation follow different hydrology. Climate change makes ‘surplus’ rivers an unstable idea. Watershed, zoning, and dedicated waterways are the least-cost complements.
Model answer
Copper italics in this answer — like this — are the key facts. Each one is unpacked in the Facts & figures rail.
Introduction
The National Perspective Plan for interlinking rivers promises to move flood water to drought districts and to restore inland boats. Ken–Betwa is the first living test. Hydrology, ecology, and federal politics say the promise is partial, costly, and not a standalone viable fix.
Body
The case made for linking
- Surplus-to-deficit transfer could, in theory, shave Ganga–Brahmaputra flood peaks and refill dry Peninsular tanks.
- A long navigable contour would cut diesel trucking, a logistics argument the question names as interrupted navigation.
- Ken–Betwa is sold as Bundelkhand drought relief plus a dam that also claims hydropower and tourist water.
Why floods, droughts, and boats are not one pipe
- Flood and drought can occur in the same basin in one year. A canal does not cancel cloudbursts or a failed monsoon on the receiving side.
- Himalayan rivers are silt-heavy and seasonal; Peninsular rivers are monsoon-pulse. Linking unlike hydrographs needs storage that submerges forests and villages.
- Navigation needs assured draft, terminals, and low silt. Interlinking is a water-transfer project first; inland waterways (IWAI, National Waterways) can proceed without a subcontinent-wide plumbing grid.
Ecological and social critique
- Ken–Betwa threatens the Panna tiger and vulture landscape and a dry deciduous ecology that is not ‘wasted surplus’.
- Delta shrinkage, reduced environmental flows, and the Ganga–Brahmaputra sediment budget are climate-sensitive. Yesterday’s surplus is not a treaty with 2050 glaciers and a wilder monsoon.
- Displacement, interstate disputes (Sutlej–Yamuna, Cauvery memories), and huge capital cost fail a least-cost test against watershed, aquifer recharge, crop shift, and urban storm drains.
Critical verdict
- Some local links and storage may help. A pan-India grid as the viable solution to three distinct problems oversells engineering.
- Viable packages: floodplain zoning plus reservoirs for floods; rainwater and Atal Bhujal-type groundwater work for drought; dedicated waterways on already navigable stretches for boats.
Flow diagram
flowchart TD ILR[River linking] --> CL[Claimed flood drought nav] ILR --> ECO[Forest displacement silt] ALT[Watershed waterways zoning] --> SOL[More viable mix] CL --> Q[Only partial] ECO[ECO] --> Q[Q]
Conclusion
River interlinking can move some water. It cannot by itself solve drought, flood, and navigation, which have different physics. Ken–Betwa shows the ecological bill. Critically, treat ILR as one optional project class, not as India’s water philosophy.
Quick related
Students also ask
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How does the cryosphere affect global climate?
Next question on this syllabus topic (2017 · Q8). View answer →
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Is all interlinking doomed?
Small, studied, consent-based links may help. A single grid as the national drought-flood-nav solution is not viable.
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The exam stem said ‘revivers’.
That is a misprint for rivers. The debate is interlinking of rivers.
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