The File syntax for IFF-files (iMOD Flowpath File) is very simple and stored in ASCII-format. In this way these type of files can be easily edited and/or created outside iMOD with other (commercial) software. The formal syntax is as follows and prescribed:
|
NFIELDS |
Number of fields; NFIELDS=9. |
|
PARTICLE_NUMBER |
Number of the particle in the particle tracking. |
|
ILAY |
Modellayer number of the current position of the particle. |
|
XCRD. |
X-coordinate of the current position of the particle. |
|
YCRD. |
Y-coordinate of the current position of the particle. |
|
ZCRD. |
Z-coordinate of the current position of the particle. |
|
TIME(YEARS) |
Age at the current position of the particle. |
|
VELOCITY(M/D) |
Velocity at the current position of the particle. |
|
IROW |
Row number at the current position of the particle. |
|
ICOL |
Column number at the current position of the particle. |
|
DATABLOCK |
Each record (line) will contain data for each field. |
iMOD will draw the flow path using the XCRD, YCRD and ZCRD (the latter is used within the Cross-Section Tool and the 3-D Tool). Whenever the PARTICLE_NUMBER changes, iMOD will start drawing another line until the end of the IFF-file is reached.
Example of an IFF-file:
9
PARTICLE_NUMBER
ILAY
XCRD.
YCRD.
ZCRD.
TIME(YEARS)
VELOCITY(M/DAY)
IROW
ICOL
1 16 251360.000 470918.000 -6.11097100 0.00000000 0.00000000 172 135
1 16 251300.000 470944.332 -6.16740767 1014.79259 0.176826867E-03 172 134
1 16 251200.000 470992.694 -6.90532732 2710.67655 0.178854918E-03 172 133
1 16 251185.895 471000.000 -7.57157748 2950.02773 0.181689347E-03 171 133
1 16 251100.000 471044.002 -8.85614470 4369.76038 0.185446949E-03 171 132
1 16 251000.000 471099.323 -9.61260329 6013.67094 0.189062199E-03 171 131
1 16 250998.847 471100.000 -10.2993888 6032.53827 0.193970342E-03 170 131
1 16 250900.000 471156.775 -11.5664571 7594.27486 0.198120264E-03 170 130
1 16 250829.109 471200.000 -12.3420800 8700.03539 0.204218837E-03 169 130
1 16 250800.000 471217.342 -13.5170305 9138.31615 0.211151282E-03 169 129
2 16 251360.000 470918.000 -6.13093100 0.00000000 0.00000000 172 135
2 16 251300.000 470944.332 -6.18703115 1014.79259 0.176826866E-03 172 134
2 16 251200.000 470992.694 -6.92436614 2710.67655 0.178854917E-03 172 133
2 16 251185.895 471000.000 -7.59057218 2950.02773 0.181689347E-03 171 133
2 16 251100.000 471044.002 -8.87458960 4369.76038 0.185446948E-03 171 132
2 16 251000.000 471099.323 -9.63038197 6013.67094 0.189062198E-03 171 131
2 16 250998.847 471100.000 -10.3171595 6032.53827 0.193970342E-03 170 131
2 16 250900.000 471156.775 -11.5835148 7594.27486 0.198120263E-03 170 130
2 16 250829.109 471200.000 -12.3586440 8700.03539 0.204218836E-03 169 130
2 16 250800.000 471217.342 -13.5334170 9138.31615 0.211151282E-03 169 129
2 16 250766.894 471237.981 -14.3071899 9634.91730 0.214644513E-03 169 129