| 引用本文: | 杜明熠,于蘇越,王忠静,等.银北平原农业节水灌溉与地下水变化及生态影响情景分析[J].灌溉排水学报,2026,45(6):102-110. |
| DU Mingyi,YU Suyue,WANG Zhongjing,et al.银北平原农业节水灌溉与地下水变化及生态影响情景分析[J].灌溉排水学报,2026,45(6):102-110. |
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| 摘要: |
| 【目的】构建区域农业节水生态影响评估框架，揭示灌溉量削减条件下地下水位与植被、盐渍化的响应机制，在保证生态条件下为实际灌溉削减及灌区节水量提供参考与依据。【方法】提出基于遥感反演、地下水埋深和天然植被覆盖及土壤次生盐渍化响应的农业节水生态影响评估框架；以宁夏银北平原为例，分析了不同节水灌溉情景下地下水埋深变化及其对植被生态和土壤盐渍化程度的影响，提出了适宜的灌溉削减强度及可实施水权转换量。【结果】银北平原非地带性植被的最佳地下水埋深介于2.50~3.25 m，次生盐渍化的不利地下水埋深介于0.30~2.50 m。以此为参照，宁夏青铜峡灌区银北平原的5个子灌区中，惠农灌区仍有一定的农业节水潜力。【结论】在保证生态的前提下，惠农灌区的可实施水权转换量为1.69亿m3。研究方法可为干旱区灌区农业节水潜力评价提供参考。 |
| 关键词: 地下水；数值模拟；灌溉削减；植被覆盖度；土壤盐渍化 |
| DOI：10.13522/j.cnki.ggps.2025375 |
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| Impact of irrigation reduction on groundwater and associated ecological consequences in the Yinbei Plain |
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DU Mingyi, YU Suyue, WANG Zhongjing, ZHANG Na, WANG Tao, LI Yanbin
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1. College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China;
2. School of Civil Engineering, Tsinghua University, Beijing 100084, China;
3. Ningxia Institute of Water Conservancy Science, Yinchuan 750021, China;
4. Ningxia Hanyan Canal Management Office, Yinchuan 750003, China
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| Abstract: |
| 【Objective】The Yinbei Plain in Northwest China is characterized by scarce water resources, intensive irrigation agriculture, and fragile ecological conditions. This paper develops a framework to assess the impact of regional agricultural water conservation on ecological systems, including groundwater level, vegetation, and soil salinization under reduced irrigation conditions in this region.【Method】The assessment framework was based on remote sensing inversion, groundwater depth, natural vegetation coverage, and secondary soil salinization. Using this framework, we analyzed the impact of different water-saving irrigation scenarios on groundwater depth and the associated consequences for vegetation ecology and soil salinization, and evaluated the optimal irrigation reduction and potential water rights transfer volume.【Result】The results showed that the optimal groundwater depth for non-zonal vegetation in the Yinbei Plain ranged from 2.50 to 3.25 m, and the critical groundwater depth for secondary salinization was in the range of 0.30-2.50 m. Based on these results, the Huinong Irrigation District is the only sub-irrigation district among the five districts in the Ningxia Yellow River diversion irrigation area that still has potential for agricultural water savings.【Conclusion】Under the premise of maintaining ecological stability, the transferable water right in the Huinong sub-irrigation district is approximately 169 million m3. The proposed method provides a useful tool for evaluating agricultural water-saving potential and water resource management in irrigation districts in arid regions. |
| Key words: groundwater; numerical simulation; irrigation reduction; vegetation coverage; soil salinization |
