Skip to content

Direct Flow Demand File - Monthly (*.ddm)

The monthly direct flow demand file contains demands for direct diversions for each month of the simulation period. Monthly data is required when the diversion station variable idvcom is set to 1 (monthly total demand) or 3 (monthly irrigation water requirement). Data should be entered in the order of the structure file (*.dds). See Section 7.4.7 for a discussion of various approaches available for specifying demand data; demands may be specified as a total at the headgate or as a consumptive irrigation water requirement at the farm. This file is read by subroutine MDAINP.

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, 1x, a12, 12f8.0)
2-1 idyr Year
2-2 cistat Demand station ID
2-3 diverm(1-12,1) Demands (AF) for months 1-12

Repeat for the number of stations numdiv

Repeat for each year of the simulation