River regulation, whether through dams and reservoir operations, diversions, or other releases, can broadly influence downstream water quality, geomorphology, and biotic assemblages across large spatial scales. Episodic events such as sediment flushing, maintenance-related reservoir draw-down, or dam removal may also trigger abrupt changes in the downstream aquatic and riparian ecosystems. Better understanding of the extent to which barriers, reservoir operations, or episodic events impact the ecosystem of a river will lead to better anticipation and mitigation of negative effects. This session brings together research on innovative techniques to provide more complete views of the impacts over various spatial and temporal scales. The use of in situ monitoring, remote sensing, or modeling (physical or data-driven) to identify the extent of these impacts can provide valuable feedback for improving the sustainability of reservoir and river management. Assessments of implemented or proposed changes to flow regulation are also encouraged.