| 引用本文: | 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,2021,(10):109-116. |
| 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,2021,(10):109-116. |
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| 摘要: |
| 【目的】保障农业用水安全，促进地下水可持续利用。【方法】本文采用GIS技术和滑动窗口相关分析法研究了濮阳市浅层地下水位时空演变规律，分析了降水量、黄河水位及农业灌溉量对地下水位的影响，在此基础上探讨了保护地下水和保障灌区生产安全的供水思路与对策。【结果】2006—2018年间，北部地区（属海河流域）地下水位年际变化总体呈波动性特征，南部地区（属黄河流域）总体呈下降趋势。北部地下水位年内高水位出现2月，南部出现在4月和10月，但年内低水位均出现在6月。濮阳市浅层地下水位从南部向北部递减，黄河滩区地下水位从上游向下游递减。另外，北部地下水位与降水量具有较好的相关性，响应滞后约为6个月，而南部地下水则与黄河水位具有较好的相关性，响应滞后约1个月。针对濮阳市地下水位持续下降和用水需求不断增长的状况，提出了“构建坑塘（湿地）-沟渠-河流水系连通网络体系，提升引黄和雨洪调蓄能力，同时加强高效节水灌溉和中水回用”的农业灌溉供水思路与对策。【结论】研究区浅层地下水位在时间和空间上的变化具有明显的流域差异性，北部的地下水位变化主要由降水和农业灌溉驱动，而南部主要由黄河水位驱动。 |
| 关键词: 沿黄城市;浅层地下水;时空变化;驱动机制;农田灌溉 |
| DOI：10.13522/j.cnki.ggps.2020646 |
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| Spatiotemporal Variation of Shallow Groundwater in Puyang of Henan Province and Its Underlying Determinants |
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CAI Yi, XU Jia, ZHU Qing, RAO Yuangen, CAO Yongtao
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1. Department of Hydraulic Engineering, School of Civil Engineering, Tongji University, Shanghai 200092, China;
2. School of Continuing Education, Tongji University, Shanghai 200092, China; 3. Puyang Hydrology and Water Resources
Survey Bureau, Puyang 457000, China; 4. Yellow River Institute of Hydraulic Research, Zhengzhou 450003, China
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| Abstract: |
| 【Background】Puyang in Henan province stretches across the Yellow River Basin and the Haihe River Basin.?This geographical location makes its agriculture depend upon Yellow River Water in the south and groundwater in the north. Long-term over-extraction of groundwater has substantially dropped the groundwater table to a depth critical to compromising food production and hindering economic development of the region.【Objective】The purpose of this paper is to analyse the spatiotemporal change in shallow groundwater table and its underlying determinants in attempts to provide guidance to help develop sustainable agriculture and water usage in the region.【Method】GIS coupled with sliding window correlation analysis was used to analyse the spatiotemporal variation of shallow groundwater table in Puyang, and the response of groundwater table to precipitation, water level in the Yellow River and agricultural irrigation usage was calculated, from which we discussed the strategies to secure water supply while in the meantime alleviating groundwater table to continuing to decline.【Result】Inter-annual groundwater table from 2006 to 2018 changed erratically in the north which is part of the Haihe River Basin, and declines gradually in the south which is part of the Yellow River Basin. In the north the groundwater was the shallowest in February, whereas in the south that was in April and October. The groundwater table in the north and south both dropped to the deepest point in June. Spatially, the depth of groundwater table increased from the south to the north, and along the Yellow River, it increased from upstream to downstream. The groundwater table in the north was closely correlated to precipitation but with a six-month delay, while the south it depended on the water level in the Yellow river with a one-month lag. Considering the continued decline in depth of groundwater table and the increased demand for water, we proposed to build hydraulic networks to connect ponds, channels and rivers in the regions to improve regulation and storage of both rainfalls and the water diverted from the Yellow River. Meanwhile, it also needs to improve implementation of water-saving irrigation technologies and increase reclaimed water reuse.【Conclusion】There are marked cross-basin differences in spatiotemporal variation of the shallow groundwater table in the studied region, with groundwater table in the north affected by precipitation and irrigation while in the south being mediated by the Yellow River. |
| Key words: Yellow River; shallow groundwater; spatiotemporal variation; irrigation; Puyang |
