Compensation regulation of reservoir groups based on multi objective optimization

In order to search for a rational manner to compensate the effect of Heisonglin irrigation district after the operation of Tunzhuang reservoir which will be built, this paper established a joint water supply system and set several schemes. The improved artificial fish-swarm algorithm was used to solve problems and the ant colony algorithm was used to verify the solutions. The results showed that the efficiency of the irrigation in Heisonglin district should increase to 0.8, which was the same as the one in Tunzhuang irrigation district. The irrigation area of Tunzhuang reservoir could remain 6km². Qinzhuang reservoir and Nihegou reservoir supplied compensation to Heisonglin irrigation district. When the above-mentioned four reservoirs ran together, the available water for Heisonglin irrigation district reached 943.4×10⁴m³/a and the irrigation guarantee rate was 64.10% which was higher than the one before the operation of Tunzhuang reservoir. The optimal value of the ecology flow of Tunzhuang reservoir was 0.0517m³/s. The available water for living and irrigation of Tunzhuang reservoir were 161.24×10⁴m³/a and 111.23×10⁴m³/a respectively. Their guarantee rates were 94.23% and 80.29% respectively, both of which could meet the requirements of the targets. The final optimized scheme provided a good suggestion for the ecological operation of Tunzhuang reservoir and the healthy development of Heisonglin irrigation, which was beneficial for the harmonious utilization of water resources in the river basin.