American Geophysical Union -- Session ID# 8983 Description: Gaining a predictive understanding of dynamic ecosystem and hydrological processes in watersheds involves complex surface and subsurface hydrology, biogeochemistry, and vegetation dynamics. Heterogeneous properties and responses are needed in sufficiently detailed spatial and temporal resolution. However, properties and responses must be averaged, translated, and/or upscaled to integrate over the entire watershed or watersheds. While there has been some progress towards developing multi-scale approaches to understand and predict watershed-scale behavior, the community still struggles to extrapolate knowledge beyond the point scale. However, advances in technology and interdisciplinary cooperation are changing this trend.