| Cite this article: | 宋倩玉,徐征和,马蒙,等.基于耗水均衡的东北水田灌区地下水数值模拟与水源配置[J].灌溉排水学报,0,():-. |
| songqianyu,xuzhenghe,mameng,et al.基于耗水均衡的东北水田灌区地下水数值模拟与水源配置[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Groundwater Numerical Simulation and Water Source Allocation of Paddy Field Irrigation Area in Northeast China Based on Water Consumption Balance |
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songqianyu1, xuzhenghe1, mameng2, huyaqi2, wuwenyong2
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1.School of Water Conservancy and Environment, University of Jinan;2.China Institute of Water Resources and Hydropower Research
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| Abstract: |
| 【Background】With the development of society and the increasing global demand for food, irrigation water for agricultural production becomes more and more important.According to statistics, agricultural irrigation occupies 90% of the world's fresh water resources. Nowadays, the supply and demand of surface water resources in many areas are unbalanced, and groundwater resources become the main water source for agricultural water use.With the increase of grain production, the problem of groundwater overexploitation becomes more and more serious, which leads to groundwater overexploitation and a huge underground funnel. 【Objective】In order to alleviate groundwater overexploitation in the main grain production areas of Northeast China and promote scientific allocation of surface water and groundwater resources. 【Method】Taking Qingan County and Heping Irrigation Area in Heilongjiang Province as typical irrigation areas, this paper uses a groundwater numerical simulation model based on water consumption balance, and validates and identifies the model with measured data.On this basis, 22 scenarios under two irrigation modes were simulated with the model. 【Result】Under constant irrigation mode, when groundwater proportion is less than 66%, groundwater level in irrigation area rises and can be restored; when equal to 66%, the irrigation area is in equilibrium; when more than 66%, groundwater level in irrigation area keeps decreasing.Under water-saving irrigation mode, when the groundwater proportion is less than 68%, the groundwater level in the irrigation area will rise and recover; when 68%, the irrigation area will be in equilibrium; when more than 68%, the groundwater level in the irrigation area will decrease continuously.Water-saving irrigation mode had less fluctuation of groundwater level under each proportion scenario than constant irrigation mode. 【Conclusion】The proportion of groundwater resources in irrigation water has a significant influence on the water consumption equilibrium state of the irrigation area. With the increase of groundwater resources, the total amount of recharge and discharge difference in the irrigation area has gradually decreased to negative value in 20 years.Both irrigation modes can achieve water consumption equilibrium when groundwater accounts for 66% and 68%. |
| Key words: paddy field; water saving irrigation; groundwater model; water consumption balance |
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