Seven streamflow analysis regions in Alaska

For USGS WRIR 03-4114, the study area was divided into seven streamflow analysis regions based on hydrologic boundaries, geographic distribution of basin characteristics, and results of regressions with peak, high-duration, and low-duration streamflow data. For consistency between analyses, regional boundaries are constant. However, regions were combined as hydrologically appropriate to develop equations, such that Region 3 is grouped with Region 1 for high-duration flows but with Region 4 for low-duration flows.