| 黄淮海平原灌溉农业对地下水依赖程度与保障能力 |
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| 关键词:groundwater agriculture water for agricultural irrigation safeguard capacity the Huang–Huai–Hai Plain |
| 基金项目:中国地质调查局地质调查项目(编号: 12120115049701); 国家自然科学基金项目(编号: 41172214) |
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| Groundwater Safeguard Capacity and Dependency Degree of Agricultural Irrigation on Groundwater in the Huang–Huai–Hai Plain |
| Groundwater is an important water source for agricultural irrigation in the main grain production region in North China, especially in the Huang–Huai–Hai Plain. The over-exploitation situation of groundwater is closely related to the dependence degree of irrigation agriculture on groundwater and the water support capacity (such as the safeguard capacity) of groundwater in this region. With the Huang–Huai–Hai plain as an example, the authors studied the relationship between the agricultural irrigation water, the precipitation and the crops planting intensity, the dependence degree of the agricultural irrigation on groundwater and the influence characteristics of the over-exploitation situation of groundwater and, on such a basis, proposed the corresponding concepts and methods for evaluation. The results of the application of the evaluation methodology are as follows: (1) Agricultural exploitation mainly in the irrigation period of wheat is the major factor of groundwater over-exploitation in the Huang–Huai–Hai Plain. The higher the dependence of irrigated agriculture on groundwater and the less the precipitation before irrigation period, the more serious the over-exploitation will be; (2) The shallow groundwater level in the agricultural exploitation area declines by more than 1.0 cm/d during the irrigation period and rises by less than 1.0 cm/d during non-irrigation period; (3) The regional characteristics, the situation and the causes of the dependence degree of irrigation agriculture on the groundwater and the safeguard capacity of the groundwater can be objectively clarified by using the evaluation methodology which includes the dependence degree of irrigation water on groundwater (A), the supply extent of the groundwater to irrigation water (B), and the safeguard capacity (C). According to the results obtained, the groundwater safeguard capacity for agricultural irrigation is poor in the northwest area of the Huang–Huai–Hai Plain, especially in the Hebei Plain, the groundwater can hardly or even unable to guarantee the agricultural irrigation; in contrast, the safeguard capacity is stronger in the south area of the plain. |
| TIAN Yan-liang,ZHANG Guang-hui,WANG Qian,YAN Ming-jiang,WANG Wei,WANG Jin-zhe.2016.Groundwater Safeguard Capacity and Dependency Degree of Agricultural Irrigation on Groundwater in the Huang–Huai–Hai Plain[J].Acta Geoscientica Sinica,37(3):257-265. |
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