A watershed rationale that assumes that outflows are integrated by the watershed to yield floods and low flows with certain provincial correlations has been explored. The provincial correlations use combinations of various watershed geomorphic characteristics, including stream length and watershed area, length, and relief. A 1, 2, 3 power relationship among average low, flood, and annual flows opens new opportunities for flood flow predictions. The possibility of being able to predict flood flows in terms of channel characteristics has been presented. To complete the integrated watershed rationale, channel characteristics have been predicted in terms of watershed characteristics by setting two flood flow equations from different mountainous regions equal to each other. The only input term used in the analysis is the average annual watershed precipitation. Floods have been shown to be strongly dependent on watershed area, relief, and stream length--those geomorphic parameters that are analogous to certain physical hydrologic processes and that make the integrated watershed rationale possible./Author/