Optimal conjunctive use of aqua-agriculture reservoir and irrigation canal for paddy fields (case study: Tajan irrigation network, Iran)

摘要: Aqua-agriculture reservoirs have been used as one of the main resources for supplying water to paddy fields, particularly under shortage conditions. In this study, a simulation–optimization model conjunctive use irrigation canals and aqua-agriculture reservoir was developed in order maximize rainwater harvesting while minimizing withdrawal from canal. The simulation optimization processes were done based on balance using genetic algorithm, respectively. run dry (2014), normal (2013) wet (2012) years Zarrin-Kola reservoir, located Juybar, north Iran. According results, wet, years, 37.4, 29.9 12.1% precipitation at upstream transformed runoff, results depicted that volume overflow 0.45 0.13 times greater than maximum capacity, Therefore, amount withdrawn should be decreased or capacity could increased much overflowed year. Increasing area cultivation fields planting second crops can considered other management practices optimum usage. However, there deficit year withdrawing canal not capable address total demand. scenarios, it concluded drought conditions, decreasing efficient approaches. If is carried out (i.e., full irrigation), irrigated by 620 424 ha.