What Happened
- Andhra Pradesh Chief Minister N. Chandrababu Naidu unveiled a comprehensive blueprint for an integrated statewide water grid, proposing to link major rivers and their tributaries across the state to address chronic water scarcity.
- While the Krishna and Godavari rivers were already linked in 2015–16 through the Pattiseema Lift Irrigation Project, the new plan goes beyond this by connecting additional rivers including Vamsadhara, Nagavali, and Champavathi — rivers draining from the Srikakulam region — to water-deficit areas like Rayalaseema and Anantapur.
- The plan envisages diverting approximately 200 TMC (trillion cubic feet) of Godavari floodwaters toward the Nagarjuna Sagar ayacut, routing water through projects like Nallamala Sagar and Veligonda, thereby freeing up Srisailam reservoir storage for Rayalaseema's needs.
- Completing the Polavaram Project before the 2027 Godavari Pushkaralu is identified as the critical enabler — its right bank canal provides the gravity-flow conduit for Godavari water entering the Krishna system.
- The proposal represents one of the most ambitious intrastate river-linking exercises in India since the National Perspective Plan was formulated.
Static Topic Bridges
National River Linking Project (NRLP) and National Perspective Plan
The National Perspective Plan (NPP) for water resources development — the policy document underpinning the National River Linking Project (NRLP) — was prepared in 1980 by the then Ministry of Irrigation (now Ministry of Jal Shakti) and the Central Water Commission (CWC). The plan envisions transferring water from "surplus" river basins to "deficit" basins through a network of canals and reservoirs, covering two components: the Himalayan Rivers Development component (14 links) and the Peninsular Rivers Development component (16 links, including the Godavari–Krishna–Cauvery cascade).
- National Water Development Agency (NWDA), under the Ministry of Jal Shakti, is the nodal body for NRLP feasibility studies
- In 2021, the Centre proposed the National Interlinking of Rivers Authority (NIRA) as the apex body to oversee implementation — not yet enacted into law
- The constitutional basis for inter-state river linking lies in Entry 56, Union List, Seventh Schedule — "Regulation and development of inter-State rivers and river valleys to the extent to which such regulation and development under the control of the Union is declared by Parliament by law to be expedient in the public interest"
- Implementation of ILR projects requires consent of all riparian states — making inter-state links politically complex
- Andhra Pradesh's current plan is an intrastate linking initiative, which avoids inter-state consent issues
Connection to this news: AP's water grid focuses on intrastate river links, drawing on the NRLP framework but sidestepping inter-state political negotiations. Completing the Polavaram Project — an inter-state project with implications for Odisha and Chhattisgarh — remains the critical bottleneck.
Pattiseema Lift Irrigation Project — India's First Inter-River Link
The Pattiseema Lift Irrigation Project, inaugurated in March 2016, is India's first operational river interlinking project. Proposed under Chief Minister Chandrababu Naidu in January 2015 and completed in record time (under one year), it links the Godavari River to the Krishna River via the Polavaram Right Main Canal, enabling 80 TMC of floodwater to be transferred from Godavari to the Krishna delta during the monsoon season (July–October).
- Technical capacity: 24 pumping units, one of Asia's largest pump houses; combined discharge capacity of 240 cumecs
- Water transfer route: Pattiseema (on Godavari) → Polavaram Right Main Canal → travels ~160 km by gravity → reaches Prakasam Barrage on Krishna
- Water travel time (by gravity after pumping): 7–8 days to reach Prakasam Barrage
- Year of inauguration: March 2016; planning commenced January 2015
- In the 2015 trial run alone, 8.8 TMC of Godavari water was transferred, saving standing crops worth ₹2,500 crore during a dry spell
- The project covers approximately 1.3 million acres (across four coastal districts)
Connection to this news: The Pattiseema success has validated the engineering feasibility of river linking in the Godavari–Krishna system and serves as the template for the expanded water grid now proposed by Naidu.
Polavaram Project — National Project Status and UPSC Significance
The Polavaram Project on the Godavari River in Andhra Pradesh is a multi-purpose irrigation, hydropower, and drinking water project declared a National Project by the Central Government. Its completion is essential for any further expansion of the Godavari–Krishna water transfer system, since the Polavaram Right Bank Canal is the gravity conduit that feeds the Pattiseema link.
- Status: National Project under the Inter-State River Water Disputes Act framework; Central funding support
- Reservoir area: Submerges parts of tribal areas in Andhra Pradesh, as well as areas in neighbouring Chhattisgarh and Odisha — a source of inter-state negotiation
- Hydropower capacity: 960 MW (installed)
- Irrigation benefit: Expected to irrigate 7.2 lakh acres in the Krishna and Godavari delta districts
- Drinking water supply: Proposed to supply water to 540 habitations across 29 constituencies
- Pushkaralu deadline: State government aims to complete the project before the Godavari Pushkaralu in 2027
Connection to this news: Completion of Polavaram is the prerequisite for gravity-based transfer of Godavari waters into the Krishna system at scale — the cornerstone of AP's new water grid vision.
Inter-State Water Disputes Framework
Water is a concurrent subject under India's Constitution, with rivers touching multiple dimensions of federalism. Entry 17 of the State List (Seventh Schedule) governs "water, water supplies, irrigation and canals," but Entry 56 of the Union List gives Parliament overriding authority over inter-state river regulation. The Inter-State River Water Disputes Act, 1956 (amended 2002) provides for the constitution of Tribunals for adjudicating inter-state water disputes.
- Key tribunals affecting AP: Krishna Water Disputes Tribunal I (award 1973), Tribunal II (proceedings ongoing); Godavari Water Disputes Tribunal (award 1979)
- The 2016 amendment to the Act — Inter-State River Water Disputes (Amendment) Bill — proposed a permanent tribunal with a dispute resolution committee, but implementation has been incremental
- The Bachawat Award (KWDT-I, 1973) allocated 811 TMC of Krishna water among AP, Karnataka, and Maharashtra; AP received 800 TMC [Unverified — exact figures may have been revised under KWDT-II]
- Supreme Court has held that it cannot compel implementation of inter-linking projects as they involve policy decisions under legislative competence (2012 SC judgment dismissing PIL on ILR)
Connection to this news: AP's intrastate water grid avoids the legal complexities of inter-state tribunals — but its success still depends on resolving Polavaram's inter-state submergence disputes with Odisha and Chhattisgarh.
Key Facts & Data
- Pattiseema Lift Irrigation Project inaugurated: March 2016
- Transfer capacity: 80 TMC per season; 240 cumecs discharge
- Route length: ~160 km from Pattiseema to Prakasam Barrage (gravity flow)
- Godavari water proposed for new grid: ~200 TMC toward Nagarjuna Sagar ayacut
- Polavaram hydropower capacity: 960 MW
- NWDA — nodal body for NRLP feasibility studies, under Ministry of Jal Shakti
- NRLP components: 14 Himalayan river links + 16 Peninsular river links = 30 links total
- Constitutional basis for inter-state linking: Entry 56, Union List, Seventh Schedule
- Inter-State River Water Disputes Act: 1956 (amended 2002)