| 引用本文: | 刘雯昱,陈晓宏.华南地区省际用水效率时空差异及驱动因子研究[J].灌溉排水学报,2021,(11):122-128. |
| LIU Wenyu,,CHEN Xiaohong.华南地区省际用水效率时空差异及驱动因子研究[J].灌溉排水学报,2021,(11):122-128. |
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| 摘要: |
| 【目的】识别华南地区省际间的用水效率水平差异及主要影响因素。制定有针对性的措施以有效提高华南地区的用水效率水平。【方法】本文主要采用TOPSIS-信息量权重法，从生活、农业、工业、生态、社会经济5大方面构建全面的用水效率评价指标体系，对华南地区以省行政区为单位，综合评价其用水效率水平，分析2000—2018年华南地区用水效率水平的时间差异及变化趋势。其次，运用泰尔系数分析了各指标省际间的空间差异变化趋势，采用灰色关联法深入探求华南各省用水效率的主要驱动因子。【结果】2000—2018年，福建省用水效率水平最高，远超广西和海南，广东省第二；指标空间差异方面，万元GDP用水量及万元工业增加值用水量空间差异最大，农田灌溉用水效率及综合人均用水量空间差异最小；驱动因素方面，4省均受用水环节相关指标影响，耗水量、排水量影响最大，其次还与经济、水资源总量有关。【结论】华南地区用水效率水平逐年上升，空间差异主要表现为自东南向西北，用水效率逐渐降低。经济发展及城镇化水平更高的省份用水效率更高，如福建省、广东省，其用水效率主要受用水环节相关因素影响，还受经济发展水平、水资源总量驱动。 |
| 关键词: 华南地区；用水效率；TOPSIS分析；信息量权重；泰尔系数；灰色关联 |
| DOI：10.13522/j.cnki.ggps.2021071 |
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| Spatiotemporal Variation of Water Use Efficiency and Its Drivers in South China |
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LIU Wenyu, CHEN Xiaohong
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1. Sun Yet-sen University, Zhuhai 519082, China;
2. Center for water resources and environment, Sun Yet-sen University, Guangzhou 510275, China
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| Abstract: |
| 【Background and objective】Spatiotemporal variation in water use efficiency and its underlying drivers are important factors in ecosystem management. South China is relatively abundant in water resources and saving water has not yet received as much attention as in other parts of the country. However, seasonal water shortage does occur and it is hence imperative to improve its water use efficiency. The purpose of this paper is to analyze the spatiotemporal variation of water use efficiency in this region.【Method】A comprehensive index system for evaluating water use efficiency was constructed based on living standards, agriculture, industry, ecology and economy in each province in southern China. The water use efficiency and its temporal change from 2000 to 2018 in each province was evaluated based on administrative region. The provincial variation of each index was analyzed using the Thiel coefficient, and its drivers were analyzed using the grey correlation method.【Result】Among the four provinces we analyzed, Fujian province was most effective in water use during this period, far ahead of Hainan and Guangdong provinces, while Guangxi autonomous region was the worst. The difference in water consumption per 10 000 yuan GDP and 10 000 yuan industrial-added value was the greatest between the four studied provinces. In contrast, the difference in irrigation water use efficiency and water consumption per capita was the smallest. Water use efficiency in the four provinces was mostly affected by water consumption and drainage, in addition to the economy and total water resource availability.【Conclusion】Water use efficiency in south China has been in steady increase. Overall, water use efficiency decreased from the southeast to northwest, and was higher in the highly industrialized province such as Fujian and Guangdong provinces. In addition to water-related factors, variation in water use efficiency was also affected by economic development and water resource availability. |
| Key words: Southern China; water use efficiency; TOPSIS analysis; information weight; Thiel coefficient; grey correlation method |
