| 基于线性规划和MODFLOW耦合技术的人民胜利渠灌区水资源优化配置研究 |
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| 作者单位： | ;1.中国农业科学院农田灌溉研究所;2.中国农业科学院河南新乡农业水土环境野外科学观测试验站;3.中国农业科学院农业水资源高效安全利用重点开放实验室 |
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| 摘 要： | 【目的】确定人民胜利渠灌区合理的农业水资源优化配置方案,为灌区水资源管理和机井布置提供科学依据。【方法】针对人民胜利渠灌区水资源分配不合理及灌区生态环境恶化问题,按照灌区地形地貌、工程类型和灌溉水源特点将灌区分为Ⅰ、Ⅱ、Ⅲ共3个计算单元,基于线性规划方法和MODFLOW地下水数值模型对灌区各计算单元进行不同水文年水资源优化配置,并模拟优化配置后地下水位动态变化。【结果】确定了不同水文年灌区的水资源优化配置方案:灌区计算单元Ⅰ、Ⅱ、Ⅲ区不同水文年的井渠比例有所不同,平水年井渠比分别为1/3.14、1/3.25、1/2.92,丰水年分别为1/3.47、1/3.66、1/3.24,枯水年分别为1/2.75、1/2.77、1/2.60;平水年计算单元Ⅰ区模拟地下水埋深相比初始埋深下降0.01 m,水资源总量基本处于平衡状态;计算单元Ⅱ、Ⅲ区模拟地下水埋深相对于初始埋深分别上升了0.12、0.15 m;丰水年灌区计算单元Ⅰ、Ⅱ、Ⅲ区模拟地下水埋深相比初始埋深分别上升了0.1、0.23、0.3 m;枯水年灌区计算单元Ⅰ、Ⅱ、Ⅲ区模拟地下水埋深相比初始埋深分别下降了0.17、0.08、0.04 m。【结论】线性规划方法和MODFLOW地下水数值模型相结合能较好地模拟灌区地下水流场和预测地下水动态变化趋势,进而确定合理的水资源优化配置方案。
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| 关 键 词： | 井渠结合灌区 线性规划 MODFLOW 水资源优化配置 |
Study on Optimal Allocation of Water Resources in Irrigation District Based on Linear Programming and MODFLOW Coupling Technology |
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| Institution: | ,Irrigation Research Institute, Chinese Academy of Agricultural Sciences,Agriculture Water and Soil Environmental Field Science Research Station of Xinxiang City of Henan Province,Chinese Academy of Agricultural Sciences,Key Laboratory of High Efficient and Safe Utilization of Agriculture Water Resources, Chinese Academy of Agricultural Sciences |
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| Abstract: | 【Objective】The linear programming method is combined with MODFLOW groundwater numerical model to determine the reasonable optimal allocation scheme of agricultural water resources in the Peoples Victory Canal Irrigation Area.【Method】The distribution of water resources was unreasonable, and the ecological environment was deteriorating gradually in the Peoples Victory Canal Irrigation Area. The irrigation area was divided into three calculation units(I, II and III) according to the landform, engineering type and irrigation water source characteristics of the irrigation area. Based on the linear programming method and MODFLOW groundwater numerical model, the optimal allocation of water resources was carried out for each calculation unit in different hydrological years, and the dynamic change of groundwater level was simulated.【Result】The optimal allocation scheme of water resources was determined in irrigation districts in different hydrological years: well-canal ratios of the irrigation district calculation units I, II and III were different in different hydrological years. Well-canal ratio were 1/3.14, 1/3.25 and 1/2.92 respectively in flat water years, 1/3.47, 1/3.66 and 1/3.24 respectively in wet years and 1/2.75, 1/2.77 and 1/2.60 respectively in dry years.Compared with the initial depth of groundwater, the simulated depth of groundwater decreased by 0.01 meters in Area I in flat water years, and the total amount of water resources was basically balanced. The simulated groundwater depth increased by 0.12 m and 0.15 m relative to the initial depth in the calculation units II and III; The simulated groundwater depth respectively increased by 0.1 m, 0.23 m and 0.3 m compared with the initial depth in the calculation units I, II and III of the irrigation area in rainy years; In dry years, the simulated groundwater depth in calculation units I, II and III of irrigation district decreased by 0.17 m, 0.08 m and 0.04 m respectively compared with the initial depth.【Conclusion】The combination of linear programming method and MODFLOW groundwater numerical model can better simulate the groundwater flow field and predict the dynamic change trend of groundwater in the irrigation district, and then a reasonable optimal allocation scheme of water resources is defined. |
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| Keywords: | well-canal irrigation area linear programming MODFLOW optimal allocation of water resources |
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