Abstract
Saving water and improving water productivity influence the socioeconomic measures like equity that should be considered in water distribution management especially in drought conditions. In this research for different scenarios of irrigation water management, the performance measures of water equity and productivity in Ordibehesht channel (Doroodzan irrigation network) was optimised simultaneously by using genetic algorithm (GA). The results showed that rising water reduction fraction (WRF) (0.0 to 0.8) has the incremental effect on water equity and productivity (on average 39.2% and 43.3%, respectively). With increasing irrigation application efficiency (Ea) (40% to 90%), the values of water equity and productivity increased by on average 59.9% and 113.5%, respectively. Increment of conveyance efficiency of channels (Ec) (70% to 90%) resulted in minimum incremental effect on water equity and productivity (on average 19.8% and 14.1%, respectively). Furthermore, the values of performance measure decreased from wet water year to drought water year.
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