4.24 - Daily Precipitation File (*.pdy)
The daily precipitation file (*.pdy) contains daily precipitation in inches for each climate station
for years pnyr1 through pnyr2, described below. The daily precipitation file is used for the Penman-Monteith,
Modified Hargreaves, and ASCE Standardized Penman-Monteith daily ET methods (flag1= 3, 4, or 5, respectively
in the model control file, Section 4.4). The data must be in calendar year format. The file must contain
data for all years in the simulation between nyr1 and nyr2, defined in the model control file (see Section 4.4).
There must be a one-to-one correspondence between the climate stations listed in the climate station data file
(*.cli) and the climate station data in the daily precipitation file. An example is provided in Appendix A.
Note that daily climate data can not be processed with a monthly consumptive use method (e.g. Modified
Blaney-Criddle, Original Blaney-Criddle, or Pochop).
| Row-Data | Program Variable | Description |
|---|---|---|
| Row 1 | Format (6x, i4, 11x, i4, 7x, a3) | |
| 1-1 | pnyr1 | Beginning year of precipitation data |
| 1-2 | pnyr2 | Ending year of precipitation data |
| 1-3 | idum3 | CYR for calendar year |
| Row 2 | Format (i4, 2x, i2, 2x, a12, 31(f6.0)) | |
| 2-1 | yr | Year |
| 2-2 | mo | Month |
| 2-3 | tid | Precipitation station ID |
| 2-4 | rf(1-31) | Precipitation for days 1-31 in month mo |
Repeat for the number of precipitation stations.
Repeat for each month in year yr.
Repeat for each year pnyr1 through pnyr2.