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 Therefore, the amount of withdrawn water from irrigation canals should be decreased or the capacity of the reservoir could be increased as much as overflowed water in wet year.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

中文翻译：

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稻田最佳组合使用水产农业水库和灌溉渠（案例研究：伊朗塔扬灌溉网络）

水产农业水库已被用作向稻​​田供水的主要资源之一，特别是在缺水条件下。在这项研究中，开发了灌溉渠和水产农业水库联合使用的模拟优化模型，以最大程度地收集雨水，同时最大程度地减少灌溉渠的取水量。仿真和优化过程分别基于水平衡和遗传算法完成。该模型针对位于伊朗北部Juybar的Zarrin-Kola水产农业水库进行了旱年（2014年），正常年（2013年）和湿年（2012年）运行。根据结果​​，在潮湿，正常和干燥年份，上游水库的降水分别转换为径流的37.4％，29.9％和12.1％。结果表明，在潮湿和正常年份，水库的溢流量分别是水库最大容量的0.45和0.13倍。因此，应减少灌溉渠中的抽水量，或增加水库的容量，以增加雨季的溢水量。可以考虑增加耕地面积或种植第二种作物，以此作为优化用水的其他管理方法。但是，干旱年份灌溉不足，从运河取水无法满足总用水需求。根据考虑的方案的结果，可以得出结论，在干旱条件下，亏缺灌溉或减少耕种面积可被视为有效的管理方法。