River networks based on Digital Elevation Model (DEM) data differ depending on the DEM resolution, accuracy, and algorithms used for network extraction. As spatial scale increases, the differences diminish. This study explores methods that identify the scale where networks obtained by different methods agree within some margin of error. The problem is relevant for comparing hydrologic models built around the two networks.
Quintero, F., W.F. Krajewski, Conflating the Iowa Flood Center high-resolution river network with the National Water Center NHDPlus network, Journal of the American Water Resources Association, 54(1): 28-39, 2018.