Comment:

The farm or watershed study may involve several fields, or subareas, or as generally called homogenous hydrologic landuse units (HLU). Each subarea is homogenous in climate, soil, landuse (operation schedule), and topography. Therefore, the heterogeneity of a watershed/farm is determined by the number of subareas. Each subarea may be linked with each other according to the water routing direction in the watershed, starting from the most distant subarea towards the watershed outlet. The subareas are described in filename.sub. All filename.sub files need to be listed in SUBACOM.DAT (or user chosen name) to reference the numbered list of the subareas and their file names. Subarea is a class variable with variables that are constant for each respective site. The input data for each of the subarea files is contained in the filename.sub files.