Replace static water treaties (which allocate fixed volumes based on historical averages) with dynamic agreements that adjust allocations based on real-time hydrological conditions and predictable climate trends.

Four design components: (1) Climate-Adjusted Baseline Allocations: Use 20-year rolling average flows rather than historical fixed volumes; conduct formal renegotiation every 10 years with IPCC-informed precipitation projections. 5 billion m³/year assumption.

(2) Drought-Contingency Sharing: Pre-agreed scaling rules specify how allocations shrink proportionally when flows fall below historical medians — preventing upstream dam-building races by establishing binding downscaling thresholds.

(3) Water Banking and Trade: Allow upstream nations to store excess flows in 'water banks' (aquifers, reservoirs) and trade water rights in drought years, creating economic incentives for efficiency rather than extraction maximization.

(4) Transboundary Water Commission with Binding Arbitration: Establish basin-level authorities (modeled on the Rhine Commission or Mekong River Commission) with independent technical secretariats and binding arbitration power for disputes — removing unilateral action as a viable strategy.