| Cite this article: | 蔡奕,徐佳,朱勍,等.濮阳市浅层地下水位时空演变特征及驱动机制[J].灌溉排水学报,0,():-. |
| Cai Yi,Xu Jia,Zhu Qing,et al.濮阳市浅层地下水位时空演变特征及驱动机制[J].灌溉排水学报,0,():-. |
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| Characteristics and Driving Mechanism of Tempo-spatial Variation of Shallow Groundwater Table in Puyang |
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Cai Yi1, Xu Jia1, Zhu Qing2, Rao Yuangen3, Cao Yongtao4
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1.Department of Hydraulic Engineering,School of Civil Engineering, Tongji University;2.School of Continuing Education, Tongji University;3.Puyang Hydrology and Water Resources Survey Bureau, Henan Province;4.Yellow River Institute of Hydraulic Research
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| Abstract: |
| 【Background】Puyang straddles across the Yellow river basin and the Haihe river basin. Its special geographical location has created a unique pattern of agriculture irrigation, that is depending upon the Yellow river water in the south and groundwater in the north. The long-term exploitation has formed a groundwater funnel area, which seriously threatens the food production in the north and restricts the coordinated development inside the city. 【Objective】In order to ensure the safety of agricultural water resources and promote the sustainable utilization of groundwater,【Method】GIS technology and sliding window correlation analysis were employed to investigate tempo-spatial variation of shallow groundwater table in Puyang, and the effects of precipitation, water level of the Yellow river and agricultural irrigation on groundwater table were analyzed in the paper. On the basis, the water supple ideas and countermeasures to protect groundwater and ensure production safety in irrigation regions were discussed.【Result】During the period from 2006 to 2018, the inter-annual variation of groundwater table is of volatility in the north (a part of the Haihe river basin), while that generally experiences a decrease in the south (a part of the Yellow river basin). The highest groundwater table in the north appears in February, whereas that in the south does in April and October. The lowest groundwater table in both the north and the south appears in June. The shallow groundwater table decreases from the south to the north, and the groundwater table in the beach area of the Yellow river declines from the upstream to the downstream in Puyang. Furthermore, the groundwater table in the north has a good correlation with the precipitation and the response lag is about six months, while that in the south has a good correlation with the Yellow river water level and the response lag approximates to one month. In view of the continuous decline in the groundwater table and the growing demand for water in Puyang, it is proposed to build a water network connecting ponds (or wetlands), ditches and rivers for improving the regulation and storage capacity of the Yellow river water diverted and rainwater, and meanwhile to strengthen the efficient water-saving irrigation and reclaimed water reuse.【Conclusion】There are marked cross-basin differences in tempo-spatial variation of shallow groundwater table in the study area. The groundwater table in the north is mainly affected by precipitation and irrigation water consumption, while that in the south is governed by the water level of the Yellow river. |
| Key words: cities along the Yellow River; shallow groundwater; tempo-spatial variation; driving mechanism; agricultural irrigation |
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