Authors: Mohammad Mehdi Moghimi; Ali Reza Sepaskhah
Addresses: Irrigation Department, Shiraz University, Shiraz, Islamic Republic of Iran ' Irrigation Department, Shiraz University, Shiraz, Islamic Republic of Iran
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.
Keywords: deficit irrigation scheduling; DIS; winter wheat; genetic algorithm; optimisation; irrigation efficiency.
International Journal of Hydrology Science and Technology, 2017 Vol.7 No.3, pp.286 - 302
Received: 23 Dec 2015
Accepted: 19 Aug 2016
Published online: 26 Sep 2017 *