Fig. 4
Examples of different cases encountered in identifying corresponding catchment for each stream gauge using HydroATLAS polygons. The polygon with black outline and gray fill color represents the basin area from GAGES-II data and is considered the correct polygon. Polygons with blue boundaries and white fill color represent sub-basins from HydroATLAS. The green dot indicates the stream gauge location. Each map shows data for station locations with the name shown in the plot title. Plot (a) shows the overlap between GAGES-II and HydroATLAS polygons. Plot (b) shows the discrepancy when the stream gauge location does not align with the outlet (or boundary) of the HydroATLAS polygon. Plot (c,d) shows the difference in the boundary of the HydroATLAS polygon compared to the GAGES-II polygon despite the stream gauge location being at the outlet.
