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Joint operation of mountainous-plain reservoirs group based on bilayer programming in Manas River Irrigation District |
HUANG Hejiaolong1,2, LIU Bing1,2 *, YANG Guang1,2, SUN Yinglin1,2, WANG Ting1,2 |
1. College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China; 2. Key Laboratory of Cold and Arid Regions Eco-Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832000, China |
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Abstract In order to optimize the water supply dispatching of reservoir groups to irrigation areas and fulfill the water-saving potential of reservoir groups in the basin under the constraint of the total capacity of water resource, the Manas River irrigation districts was taken as an example and optimizes the joint operation rules of mountain and plain reservoir groups by bilayer programming in this study. The upper level optimization objective is to minimize the evaporation and leakage losses during the joint adjustment process of reservoir groups. The model optimizes the water diversion rules of plain reservoirs and mountainous reservoirs to increase the chances of water storage in mountainous reservoirs. By optimizing the water supply rules of reservoir groups in the lower layer, the improvement of water supply guarantee rate of each sub-irrigation district can be realized. The optimized result shows that the loss of water resource in the basin reduces by using joint operation rules of reservoir groups. After adopting the optimized water diversion regulation, the average annual evaporation and leakage loss of reservoir groups can be reduced by 0.22×108 m3, which is 12.24% lower than the current operation of reservoir groups. The guarantee rate of water use in irrigation areas improves by the joint operation of reservoir groups. In the simulation of total water resources control in the current year and the planning year, the guarantee rates of agricultural water use in each sub-irrigation area increased by 6.70%, 7.37%, 13.00% and 17.02%, 13.49%, 12.97% respectively. The joint scheduling of reservoirs based on evaporation and seepage differences between mountainous and plain reservoirs can achieve exploiting the water-saving benefits of reservoir groups in the study area. The joint scheduling of mountainous-plain reservoirs in Manas River Irrigation District based on bilayer programming has a positive effect on exploiting the water-saving benefits of reservoir groups and improving the efficiency of water resources utilization.
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Received: 04 July 2023
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