ZONE BUDGET calculations of flow terms
The ILPFCB flag in the lpf file is currently set to a positive value, meaning that storage, constant-head flow, and flow between adjacent cells are written in the cell-by-cell (cbc) file. The ILPFCB flag indicates the unit number for this cbc file. It is necessary to use the same ILPFCB value also in all the other input files related to the relevant flow terms (e.g., the IRCHCB flag for rch, the IWELCB flag for wel, the IDRNCB flag for drn,...): basically the second flag of the second line in all the input files of boundary conditions must equal the ILPFCB value. In this way, flow terms related to all the other coundary conditions will be saved as well in the cbc file.