# 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.