长江中游地区水资源生态足迹时空分析及可持续利用评价
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重庆师范大学经济与管理学院

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国家社科基金项目;重庆市社科规划项目;高等教育科学研究规划课题


Spatio-temporal Analysis and Sustainable Utilization Evaluation of Water Resources Ecological Footprint in the Middle Reaches of the Yangtze River
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Chongqing Normal University

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    摘要:

    [目的]长江中游地区是长江流域生态保护和经济发展的重要支撑,虽然拥有丰富的水资源,但是水资源消耗问题仍然比较突出。[方法]本文选取长江中游地区覆盖的湖北、湖南和江西三省作为研究对象,以2011—2021年的数据进行分析,运用水资源生态足迹模型对三个地区的生态足迹等相关指标进行时间和空间维度的分析,并基于PSR框架和生态足迹指标构建长江中游地区水资源可持续利用评价指标体系,测算出三省的压力指数、状态指数、响应指数和综合指数。[结果](1)三省的人均水资源生态足迹和生态承载力总体呈上升趋势,且生态承载力高于生态足迹,全部实现生态盈余,这说明三省的水资源生态状况总体较好。江西省的人均水资源生态盈余最高,介于3.186—7.966之间;湖北省的人均水资源生态盈余最低,介于0.304—2.603之间。(2)三省的生态足迹各用水账户中生产用水的占比最大,生活用水次之,生态环境用水占比虽然最小,但是上升幅度最大。其中湖北省的人均生态环境用水足迹上升最明显,从2011年的0.1%上升到2021年的17%。(3)万元GDP水资源生态足迹呈现明显下降趋势,这说明水资源的利用效率在不断提高。江西省的万元GDP水资源生态足迹最高,湖北省的万元GDP水资源生态足迹最低,但是三者之间的差距呈逐年缩小态势。(4)三省的压力指数、状态指数和响应指数整体呈现下降、上升和上升的趋势,压力指数的下降趋势更明显,其余指数上升的表现有限。三省的综合指数都处于波动中上升的趋势,总体表现比较平稳,各省差异不大,但综合指数都不高,都没有超过历史的最好水平。[结论]三省的水资源可持续利用水平总体平稳,但仍有很大的提升空间,需要继续加大对生产用水和生活用水合理使用的管理,进一步鼓励生态环境用水的使用,同时加大对实现水资源可持续利用措施的推进,以此提高水资源的可持续利用水平。该研究结果可为长江中游地区及其他省市、城市群或流域地区的水资源可持续利用提供决策参考。

    Abstract:

    [Objective]The middle reaches of the Yangtze River serve as a crucial support for ecological preservation and economic development within the Yangtze River basin. Despite its abundant water resources, issues concerning water resource consumption remain significant. [Methods]This study focuses on the provinces of Hubei, Hunan, and Jiangxi in the middle reaches of the Yangtze River, analyzing data from 2011 to 2021. Employing the water resource ecological footprint model, the research conducts a temporal and spatial analysis of ecological footprints and related indicators in these regions. Furthermore, utilizing the Pressure-State-Response (PSR) framework and ecological footprint indicators, an evaluation index system for sustainable water resource utilization in the middle reaches of the Yangtze River is constructed. The study calculates pressure indices, state indices, response indices and comprehensive indices for the three provinces. [Results](1)Per capita water resources ecological footprints and carrying capacity in the three provinces show an overall increasing trend, with the carrying capacity exceeding the ecological footprint, leading to an ecological surplus. This indicates a generally favorable water resources ecological status in the provinces. Jiangxi province exhibits the highest per capita water resources ecological surplus ranging between 3.186 and 7.966, while Hubei province records the lowest ranging from 0.304 to 2.603. (2)Production water holds the largest share in the water accounts of the ecological footprints in all three provinces, followed by domestic water. Although environmental water accounts for the smallest share, it exhibits the most significant increase. Notably, Hubei province shows a substantial increase in per capita environmental water footprint, rising from 0.1% in 2011 to 17% in 2021. (3)The water resources ecological footprint per 10,000 GDP demonstrates a notable declining trend, indicating an enhancement in water resources utilization efficiency. Jiangxi province displays the highest water resources ecological footprint per 10,000 GDP, while Hubei province exhibits the lowest. Nonetheless, the gap between them is gradually narrowing each year.(4)The pressure index, state index, and response index in the three provinces generally depict decreasing, increasing, and increasing trends, respectively. The decline in the pressure index is more pronounced, while the rise in the other indices is limited. The comprehensive index for all three provinces fluctuates with an upward tendency. Although stable overall, the provinces exhibit minor discrepancies in their indices. However, none have surpassed the historical best levels. [Conclusion]The overall sustainability level of water resources utilization in the three provinces remains stable, with significant room for improvement. Continued efforts are necessary to enhance the production and domestic water, promote the ecological water, and advance measures for sustainable water resources utilization. These steps aim to elevate the level of sustainable water resource utilization. The findings of this study can serve as a reference for decision-making regarding water resources sustainability in the middle reaches of the Yangtze River and other provinces, cities, urban clusters, or basin areas.

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  • 收稿日期:2023-11-07
  • 最后修改日期:2024-08-29
  • 录用日期:2024-08-30
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