External File Format

External files may be viewed in MODFLOW-2000 and MODFLOW-2005 models
Data set 1: Comments (Optional) An unlimited number of blank lines or lines starting with the character "#" may be included at the beginning of the file.
Data Set 2: Format code A format code of 1 must on the first non-comment line of the file.The format code is used to distinguish between different possible formats of the data. At present, only a single format is accepted but in the future, additional formats may be defined.
Data Set 3: Number of data sets Specify the number of data sets in the file.
Data Set 4: Data set names List the name of each data set on a separate line. Names may be up to 17 characters long. Longer names will be truncated.
Repeat data sets 5 and 6 for each data set.
Data Set 5: NLAY, NROW, NCOL
  • NLAY = number of layers. This must be either 1 or the same as the number of layers in the model including non-simulated layers between modeled layers.
  • NROW = number of rows. This must equal the number of rows in the model.
  • NCOL = number of columns. This must equal the number of columns in the model.
Data Set 6: Data List the data for the data set starting at column=1, row=1, layer=1, multiple values may be specified per line. The data for each layer is specified as a group. Within each layer, the data for each row is specified as a group.