1. Water Resources and Sharing Problems
Water resources comprise all natural sources of freshwater, including surface water (rivers, lakes, reservoirs) and groundwater aquifers. Growing population, urbanization, industrial expansion, and climate variability have escalated water scarcity, transforming water into a contested economic and social resource.
Key Drivers of Water Sharing Conflicts
- Spatial and Temporal Variability: Rainfall in India is largely seasonal due to the monsoon, leading to severe regional imbalances in water availability.
- Over-exploitation: Intensive agricultural practices relying on deep tubewells lead to rapid depletion of groundwater tables.
- Inter-State Disputes: River basin boundaries rarely align with political state boundaries, giving rise to legal and political conflicts over allocation (e.g., Cauvery, Krishna, Godavari disputes).
- Water Quality Degradation: Discharge of untreated industrial effluents and municipal sewage reduces the net volume of usable freshwater.
2. Multi-Purpose River Valley Projects in India
Multi-purpose river valley projects are large-scale civil engineering projects designed to yield multiple benefits simultaneously, such as irrigation, power generation, flood control, and domestic water supply.
Environmental and Social Impacts
| Category | Economic Benefits | Environmental and Social Impacts |
|---|---|---|
| Environmental | Hydropower generation (clean energy), flood mitigation, drought resilience. | Vast deforestation, loss of biodiversity, destruction of wildlife corridors, reservoir-induced seismicity (RIS), and riverbed siltation. |
| Social | Reliable irrigation, municipal drinking water supply, industrial development, inland fisheries. | Mass displacement of indigenous and local populations, loss of ancestral livelihoods, socio-economic marginalization, and inadequate rehabilitation. |
3. Case Studies of Major Dams in India
A. Sardar Sarovar Dam (Narmada River)
Part of the Narmada Valley Project, the Sardar Sarovar Dam is a major multi-purpose concrete gravity dam supplying water to Gujarat, Madhya Pradesh, Maharashtra, and Rajasthan.
Economic Benefits: Irrigates millions of hectares of dry agricultural land in Gujarat and Rajasthan, supplies drinking water to thousands of villages and towns, and generates 1,450 MW of hydroelectric power.
Social and Ecological Losses: Submerged extensive prime forest cover and arable land, displaced over 200,000 people (predominantly tribal communities), and triggered widespread grassroots resistance, notably the Narmada Bachao Andolan (NBA).
B. Tehri Dam (Bhagirathi River)
Located in Uttarakhand, the Tehri Dam is a massive earth and rock-fill dam built on the Bhagirathi River.
Economic Benefits: Generates 2,000 MW of hydroelectric power, stabilizes irrigation for agricultural lands in northern India, and supplies drinking water to major urban centers including Delhi.
Social and Ecological Losses: Located in Central Himalayan Seismic Gap (Zone V), raising catastrophic dam-break concerns; fully submerged Old Tehri town; caused displacement of over 100,000 people; exacerbated fragile slope instability in the Himalayan region.
4. International Conflicts on Water Sharing
India shares major transboundary river systems with neighboring countries, necessitating bilateral treaties and diplomatic frameworks to mitigate conflicts.
| Country | River System / Treaty | Core Issues and Context |
|---|---|---|
| Pakistan | Indus Waters Treaty (1960) | Allocates eastern rivers (Sutlej, Beas, Ravi) to India and western rivers (Indus, Jhelum, Chenab) to Pakistan. Disputes arise over Indian run-of-the-river hydroelectric projects like Kishanganga and Ratle. |
| Bangladesh | Ganges Water Treaty (1996) & Teesta River | Focuses on dry-season flow allocation at Farakka Barrage. Ongoing negotiations remain unresolved regarding equitable sharing of Teesta river waters. |
| China | Brahmaputra (Yarlung Zangbo) River | Upstream dam construction and potential water diversion plans by China raise downstream flow and hydrological safety concerns in North-East India. |
| Nepal | Kosi and Gandak Treaties | Focuses on flood management, barrage control, delayed project execution, and socio-economic benefit distribution between both nations. |
5. National Water Policy (NWP)
The National Water Policy sets out the strategic orientation for water resource planning, conservation, and management in India. It was first adopted in 1987 and subsequently revised in 2002 and 2012.
Key Provisions and Principles
- Water Allocation Priorities: Safe drinking water is prioritized above all other uses, followed by irrigation, hydro-power, ecology, agro-industries, and industrial uses.
- Integrated Water Resources Management (IWRM): Emphasizes unified management of surface water and groundwater resources within a river basin framework.
- Water Governance & Tariffs: Recommends setting up independent statutory Water Regulatory Authorities to rationalize water pricing and promote efficient usage.
- Climate Resilience: Encourages community-led water harvesting, aquifer recharge, and flood management systems to tackle climate change impacts.
6. National River Linking Plan (NRLP)
The National River Linking Plan (Inter-linking of Rivers - ILR) is a mega-engineering scheme managed by the National Water Development Agency (NWDA) to transfer water from excess (surplus) river basins to water-scarce (deficit) basins.
Components of NRLP
- Himalayan Component: Comprises 14 river links connecting Northern river systems (including Ganga and Brahmaputra) to transfer excess monsoon waters.
- Peninsular Component: Comprises 16 river links connecting major Southern rivers, such as Mahanadi, Godavari, Krishna, Pennar, and Cauvery.
Critical Evaluation
| Expected Benefits | Ecological & Economic Concerns |
|---|---|
| Relief from recurring floods in surplus basins and drought in deficit basins. | Enormous financial costs and technological complexities. |
| Addition of up to 35 million hectares of irrigated farmland. | Widespread forest submersion and habitat destruction. |
| Generation of 34,000 MW of hydroelectric power. | Altered river ecology, coastal delta erosion, and large-scale population displacement. |