Sone River Water-Sharing Agreement

Sone River Water-Sharing Agreement
What is the Sone River Water-Sharing Issue?
•    The Sone River water-sharing dispute concerned the division of the 7.75 million acre-feet (MAF) of water originally allocated to undivided Bihar under the 1973 Bansagar Agreement.
•    After Jharkhand was carved out of Bihar in 2000, the two States had to determine how this existing allocation would be divided between them.
•    The dispute remained unresolved for nearly 25 years, affecting irrigation, reservoir development and water security in both States.
•    A new inter-State MoU has now established a formal allocation of 5.75 MAF for Bihar and 2 MAF for Jharkhand.
What was the 1973 Bansagar Agreement?
•    The 1973 Bansagar Agreement was a tripartite agreement involving Madhya Pradesh, Uttar Pradesh and undivided Bihar concerning the sharing of Sone River water.
•    Out of the total 14.25 MAF allocation:
o    Madhya Pradesh – 5.25 MAF
o    Uttar Pradesh – 1.25 MAF
o    Undivided Bihar – 7.75 MAF
•    Following the creation of Jharkhand in 2000, there was no mutually accepted formula for dividing Bihar's 7.75 MAF entitlement between Bihar and Jharkhand.
•    This became the basis of the prolonged inter-State dispute.
Why did the dispute persist?
•    Different geographical interests: Jharkhand inherited important upper-catchment areas, while Bihar contains major downstream agricultural regions dependent on Sone water.
•    Reservoir and dam-height issues: Jharkhand raised concerns over the submergence of agricultural land and displacement of communities.
•    Water allocation: The two States disagreed over the precise volumetric division of the inherited 7.75 MAF allocation.
•    Implementation concerns: Questions relating to reservoir levels, rehabilitation and irrigation infrastructure repeatedly delayed consensus.
•    Negotiations and technical interventions occurred over the years, but the issue remained unresolved until the present agreement.
What is the new water-sharing arrangement?
•    Bihar and Jharkhand have agreed to divide the disputed 7.75 MAF as follows:
o    Bihar – 5.75 MAF
o    Jharkhand – 2 MAF
•    The agreement provides a framework for coordinated management of Sone water between the two States.
•    It is expected to facilitate long-delayed irrigation, reservoir and river-linking projects.
•    The agreement also incorporates arrangements concerning reservoir water levels and land-submergence concerns in Jharkhand.
Why is the Indrapuri Barrage important?
•    The Indrapuri Barrage, located on the Sone River in Rohtas district of Bihar, is a major diversion structure for the Sone irrigation system.
•    It feeds the extensive Sone Canal network, which supports agriculture in parts of the Shahabad region, including Rohtas, Bhojpur, Buxar and Kaimur.
•    The new agreement is expected to facilitate more effective utilisation of water through the barrage and associated canal systems.
•    It can also support the development of additional irrigation infrastructure in drought-prone areas of Jharkhand, particularly Palamu and Garhwa.
How did the Central Water Commission contribute?
•    The Central Water Commission (CWC) provided technical inputs, including hydrological studies and reservoir/dam-height specifications.
•    It had previously attempted to facilitate a settlement but without a final resolution.
•    In the latest negotiations, technical proposals helped address the competing concerns of water availability, reservoir operation and land submergence.
•    The episode illustrates the role of technical institutions in facilitating evidence-based inter-State water negotiations.
Expected benefits :
•    Irrigation: Improved water availability for agricultural regions of Bihar and Jharkhand.
•    Drought mitigation: Better water security in drought-prone areas, particularly southern Bihar and the Palamu–Garhwa region.
•    Drinking water: Greater availability of water for rural and urban populations.
•    Infrastructure: Possibility of accelerating reservoir, canal and river-linking projects.
•    Industrial development: More reliable water availability could support industrial activity in water-stressed regions.
•    Cultural significance: Improved flows in the Falgu River through proposed Sone–Falgu linkage could support religious activities such as Tarpan and Pind-daan during the Pitru Paksha period in Gaya.
Significance for Cooperative Federalism
•    The agreement demonstrates how inter-State negotiations and institutional coordination can address disputes involving shared natural resources.
•    It reflects the principle of cooperative federalism, where States and the Union work together to reconcile competing regional interests.
•    The settlement is significant because river-water disputes involve not merely water allocation but also agriculture, livelihoods, displacement, infrastructure and drinking-water security.
•    It could provide a framework for resolving other long-standing inter-State resource disputes through dialogue, technical assessment and negotiated sharing.