Both the stream reach and catchments feature classesare generated using the TauDEM software program. The stream reach will contain numerous fields in the attribute table (Table 3), several of which are required for use in later tools in the ACPF toolbox. Each reach (junction to junction) in the output stream reach will have a corresponding catchment, or drainage area, to that section of stream. The “LINKNO” field in the attribute table of the output stream reach will equal the “gridcode” field in the attribute table of its associated catchment.