基于水足迹的中国半干旱特大城市水资源可持续利用研究

Water Supply Pub Date : 2024-07-08 DOI:10.2166/ws.2024.158
Na Li, Rui Zhang, Heping Shu, AnRong He, Xiaoyan Zhang, XinYuan Wang
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引用次数: 0

摘要

随着中国城市化进程的不断加快,经济快速发展与半干旱城市水资源短缺之间的矛盾日益突出。因此,研究水资源利用与经济增长之间的关系显得尤为重要。研究选取兰州市作为研究区域,建立了综合评价水资源利用状况的评价指标体系,同时采用水足迹法和 Tapio 脱钩模型测算了 2002 年至 2021 年水资源利用与经济发展的脱钩状况。结果表明,总水足迹和人均水足迹呈先增后减的趋势。不同产业部门的水足迹差异较大,农业用水占总用水量的 72.87%。水资源自给率超过 96.5%。经济价值从 2002 年的 22.54 元/立方米大幅增加到 2021 年的 183.99 元/立方米。缺水指数和压力指数较高,年均值分别为 0.95 和 0.99。用水量与经济增长一般呈弱脱钩和强脱钩,2011-2021 年强脱钩次数明显增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the sustainable utilisation of water resources in semi-arid megacities of China based on water footprints
As urbanisation continues to accelerate in China, the contradiction between rapid economic development and water scarcity in semi-arid cities is becoming increasingly evident. Consequently, the study of the relationship between water resources use and economic growth is of particular importance. Lanzhou City was selected as the study area, an evaluation index system was established to comprehensively evaluate the status of water resources utilisation, meanwhile, the water footprint method and Tapio decoupling model were adopted to measure the decoupling status between water utilisation and economic development from 2002 to 2021. The result showed that the total water footprint and per capita water footprint followed an increasing and then decreasing trend. The water footprint varied significantly by industrial sector, with agriculture accounting for 72.87% of total water use. The self-sufficiency rate of water resources was above 96.5%. The economic value increased substantially from 22.54 CNY/m3 in 2002 to 183.99 CNY/m3 in 2021. The water scarcity index and the pressure index were high, with annual mean values of 0.95 and 0.99, respectively. Water consumption and economic growth are generally decoupled weakly and strongly, with the number of strong decoupling occurrences increasing significantly from 2011 to 2021.
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