Changing Currents: A Case Study in the Evolution of Water Law in Western CanadaNew social, economic and environmental priorities are challengeing the Canadian water law regime. Water law in western Canada, a direct product of the colonial legal system and European settlement, illustrates many of the emerging tensions associated with a modern water management regime in fl ux. In an age of increasing hydrologic uncertainty with drier summers followed by more extreme storm events, lawmakers are seeking to increase resilience both for the environment and also for the institutions and the laws that govern freshwater resources. In Canada evidence of an evolving water law and management regime is already apparent— from developments in Aboriginal law that are changing how and who governs water, retreat by the federal government as an active participant in water resource management, to increased provincial efforts to fi ll that void.