Assess the challenges in apportioning shared river resources among successor states after bifurcation, with examples.

Bifurcation redraws boundaries, but rivers ignore them: a reorganisation statute divides territory and assets, yet leaves the parent State's single water entitlement to be re-apportioned between successors. With Article 262 barring ordinary courts and the Inter-State River Water Disputes Act, 1956 channelling disputes to slow tribunals [3], such apportionment has proved more institutional than hydrological in difficulty.

Legal and institutional vacuum

• Reorganisation Acts rarely carry a ready water-sharing schedule. Undivided Bihar's share of the Sone under the 1973 Bansagar Agreement remained unapportioned after Jharkhand's creation in 2000, and was settled only by the Bihar–Jharkhand MoU of 2026 — Bihar 5.75 MAF, Jharkhand 2 MAF [1].
• Pre-bifurcation tribunal awards bind the parent State, forcing fresh negotiation or reference for successors [3].

Contested basis of allocation

• Successors advance rival criteria — catchment contribution, irrigated command area, population, existing utilisation. The upper-riparian tribal uplands (Jharkhand) and the lower-riparian irrigation command (Bihar) generate asymmetric claims, reflected in the unequal Sone split [1].

Shared infrastructure and joint management

• Dams, barrages and canals straddle new borders, needing supervisory machinery. After the 2014 Andhra–Telangana bifurcation, the Krishna and Godavari River Management Boards functioned effectively only once their jurisdiction was notified in 2021, seven years later [4].
• Stalled works persist: the Indrapuri reservoir on the Son figured among long-pending issues at the 27th Eastern Zonal Council, Ranchi [2].

Political economy

• Water becomes an identity and electoral issue in a new State; bargaining asymmetry and mistrust harden positions, making Union facilitation indispensable [1].

Thus the core challenge is the absence of a pre-agreed, data-backed apportionment framework at the moment of division, not scarcity alone. The Sone settlement shows the way ahead: consensus-building through Zonal Councils [2], negotiated MoUs backed by joint river boards [4], and, prospectively, embedding basin-wise sharing schedules within Reorganisation Acts themselves. Such cooperative federalism converts an inherited dispute into shared prosperity.