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Instream Flow Demand File - Daily (*.ifd)

The daily instream flow demand file contains instream flow demands or a daily pattern for each day of the simulation period. Data should be entered in the order of the structure file (*.ifs). To simplify the preparation of daily data, StateMod allows the user to provide daily data or a pattern to be used with monthly data. When the instream flow station variable cifridy is set to 3 the instream flow station variable cifrid is used to indicate daily data controls and any monthly data provided in the annual instream flow demand file (*.ifa) is ignored. When the diversion station variable cifridy is set to any ID including its own (cifrid) StateMod uses daily data as a pattern to estimate daily data from monthly data using the same approach described under daily streamflow data (Section 4.36).

This file is only required if the model is operated in a daily mode. Data can be entered with stations entered in any order. This file is read by subroutine DAYDATA.

Row-data Variable Description
Control Data
1 Format (i5,1x,i4,5x,i5,1x,i4,a5,a5)
1-1 ibm Beginning month of data (e.g. 1=Jan)
1-2 iby Beginning year of data (e.g. 1975)
1-3 iem Ending month of data
1-4 iey Ending year of data
1-5 cunit Units of data
('ACFT' or 'CFS')
1-6 cyr Year type
'CYR'= calendar year (1-12)
'WYR'= water year (10-9)
'IYR'= irrigation year (11-12)
Time Series Data
2 Format (i4, i4, 1x, a12, 31f8.2, f8.0)
2-1 iy Year
2-2 im Month
2-2 cifridx Daily station ID
2-3 flowrx(1-31) Demand (cfs) or pattern (unitless) for days 1-31, etc.

Repeat for the number of instream flows stations

Repeat for each year of the simulation