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| Study on the optimal water distribution model of canal system in Hetao irrigation district |
| HAN Yu1*, SHAO Mengxuan2, LI Tongshu1, GUO Shanshan1, SUN ZhiPeng3, ZHANG Mingwu4 |
| 1. College of Water Resource & Civil Engineering, China Agricultural University, Beijing 100083, China;2. College of Water Sciences, Beijing Normal University, Beijing 100875, China;3. School of Civil Engineering, Tsinghua University, Beijing 100084, China; 4. Yellow River Institute of Hydraulic Research, Zhengzhou, Henan 450003, China |
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Abstract Optimizing the water distribution process of the canal system is an important measure to alleviate the pressure of water resources in the irrigation area and achieve efficient water saving in agriculture. A canal system optimization model is established by taking the general main canal and main canal system in Hetao irrigation district as the research object and taking the steady flow transition and the minimum water loss as two optimization objectives. The model is solved by backtracking search algorithm(BSA), multi-objective particle swarm optimization(MOPSO)and vector evaluation genetic algorithm(VEGA). The results show that the water distribution time of BSA, MOPSO and VEGA is 30.96, 11.65 and 29.96 d respectively, and the skewness coefficients of the valve opening time points are -0.048, 0.068 and 0.566, which means that BSA and MOPSO can guarantee the stability of irrigation water in the canal transportation. Considering the change of the water level at the head of the canal, BSA and MOPSO are applicable to the situation where the water intake of the canal head is less and sufficient respectively. Considering the concentration of water distribution time and the geographical distribution of main canals, BSA and MOPSO are conducive to the implementation of zoning management measures.
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Received: 04 March 2021
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