# 5.13 - StateMod Formatted Average Monthly Efficiency Files (*.def, *.wef)

The StateMod formatted average direct diversion efficiency file (*.def) is generated when the variable ddcsw= 1 and isuply= 1 or greater in the StateCU control file (see Section 4.4). The direct diversion efficiency file contains average monthly system efficiency (conveyance *application) for each structure. The StateMod formatted average well efficiency file (*.wef) is generated when the variable ddcsw= 1 and isuply= 4 in the StateCU control file (see Section 4.4). The well efficiency file contains average ground water application efficiency for each structure. Both average efficiency files are output in calendar year. The average monthly efficiency files are used in StateDMI along with irrigation water requirements to create the StateMod ‘calculated’ direct diversion demand file (*.ddm). Note that if monthly efficiencies can not be determined because either the irrigation water requirement or diversion data is missing, then the maximum monthly efficiency is reported in the well and diversion efficiency files. An example average surface monthly water efficiency is provided in Appendix A.