| 引用本文: | 王 斌,侯文峰,张 毓,等.吉林省水稻生产水足迹时空差异性
分布特征及水足迹效益评价[J].灌溉排水学报,2025,44(2):27-36. |
| WANG Bin,HOU Wenfeng,ZHANG Yu,et al.吉林省水稻生产水足迹时空差异性
分布特征及水足迹效益评价[J].灌溉排水学报,2025,44(2):27-36. |
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| 摘要: |
| 【目的】分析和探讨吉林省水稻生产水足迹时空变化。【方法】基于水足迹理论和方法，对吉林省2005—2020年水稻生产水足迹时空分布和效益进行了分析与评价。【结果】①吉林省年际间水稻生产水足迹变异较大，其中单位质量总水足迹、绿水足迹、蓝水足迹、灰水足迹分别为854.8~1 079.6、314.8~528.5、233.1~416.1、214.6~271.4 m3/t。此外，单位质量总水足迹、绿水足迹、灰水足迹呈上升趋势，而蓝水足迹呈下降趋势。②吉林省水稻生产单位质量水足迹空间分布差异明显，水足迹高值区域均分布在吉林省东部和西部地区，水足迹低值区域主要分布在吉林省中部地区。③2005—2020年，吉林省水稻生产水足迹蓝水依赖度呈波动下降趋势，平均值为44.0%，最低值为30.6%，最大降幅达43.5%；绿水则相反，最大增幅达51.3%。④2005—2020年，吉林省水稻生产水足迹重心整体向西北方向迁移，移动距离为99.87 km。⑤吉林省水稻生产水足迹产值明显提高，平均值为2.41元/m3，最大值为3.36元/m3，最大增幅达124.0%；人均水足迹与地均水足迹分别提高了116.3%和17.5%。【结论】吉林省年际间水足迹变异较大，水足迹呈东西高、中部低的分布趋势，灌溉水资源不足，提高水足迹经济效益需依靠更多耗水量，水资源利用效率有待进一步提高。 |
| 关键词: 水稻水足迹；蓝水；绿水；灰水；时空差异；水足迹效益评价 |
| DOI：10.13522/j.cnki.ggps.2024118 |
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| Spatiotemporal variation and economic benefits of the water footprint of rice production in Jilin Province |
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WANG Bin, HOU Wenfeng, ZHANG Yu, LI Jiangtao,
SHAO Zhenzhu, WANG Yin, GAO Qiang
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1. College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China; 2. Key Laboratory of
Sustainable Utilization of Soil Resources in The Commodity Grain Bases of Jilin Provincee, Changchun 130118, China
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| Abstract: |
| 【Objective】The water footprint is a key metric for characterizing water usage from various sources in crop production, offering valuable insights for improving regional water allocations. Here, we analyzed the spatiotemporal variations and economic benefits of the water footprint of rice production in Jilin Province.【Method】Using data measured from 2005 to 2020, the water footprints of rice production, including total, green, blue, and grey water, were calculated. Using these data, we analyzed the spatiotemporal variations and economic benefits of the water footprints.【Result】① The water footprint of rice production exhibited significant interannual variation. Total water footprint per unit mass of rice grain ranged from 854.8 to 1 079.6 m3/t, with contributions from green water, blue water and grey water being 314.8-528.5 m3/t, 233.1-416.1 m3/t and 214.6-271.4 m3/t, respectively. Over the study period, the total, green, and grey water footprints displayed upward trends, while the blue water footprint decreased. ② Spatially, regions with high water footprints were in the Eastern and Western parts of the province, while low water footprints were observed in central regions. ③ From 2005 to 2020, the contribution of blue water to rice production declined, fluctuating between 30.6% and 43.5%, with an average of 44.0%. Simultaneously, green water utilization increased by 51.3%. ④ During the study period, the center of rice production water footprint shifted Northwest by 99.87 km. ⑤ Economic benefits derived from the water footprint improved significantly, with an average of 2.41 yuan/m3, a maximum of 3.36 yuan/m3; the maximum growth rate was 124.0%. Compared to 2005, the water footprint per capita and the average groundwater footprint in 2020 increased by 116.3% and 17.5%, respectively. 【Conclusion】The water footprint of rice production in Jilin Province showed large interannual variation. Spatially, it is high in the east and west, and low in the center. Insufficient water resources for irrigation remain a challenge. Increasing economic benefits of water footprint heavily relies on increasing water consumption. Improving water use efficiency and optimize resource allocation is thus needed in the province. |
| Key words: rice water footprint; blue water; green water; grey water; spatial and temporal differences; water footprint benefit evaluation |
