Explore the variability within geological models of distributive fluvial systems in this 1-hour 12-minute talk. Examine the importance of conceptual models in interpreting the rock record, particularly in areas with limited outcrop or subsurface data. Investigate predictive downstream and temporal changes in fluvial characteristics, such as channel body size, and assess the extent of variability observed across these systems. Analyze recent data from the Huesca distributive fluvial system in Spain, comparing it to the well-documented Salt Wash distributive fluvial system in the southwestern United States. Gain insights into the amount of variability that should be incorporated into predictive models to accurately represent fluvial systems.