京津冀水资源利用多效率指标的变化特征比较

doi:10.18306/dlkxjz.2021.07.010

Abstract

Abstract:

Improving the efficiency of water resource use and relieving water pressure are effective measures to solve the water shortage problem in the Beijing-Tianjin-Hebei region. An overall understanding of the historical situation of water use efficiency in various industries is conducive to future policy adjustments. In this study, we compared the comprehensive water use efficiency composed of six indicators, including water consumption per 10000 yuan of GDP, water consumption per 10000 yuan of industrial added value, water pipe network leakage rate, daily domestic water consumption per capita, sewage treatment rate, and water use efficiency of crops (WUE). Then the Mann-Kendall abrupt transition point and trend change of water use efficiency in the region from 2002 to 2017 were analyzed, and the periodic variation characteristics of each indicator were analyzed based on power spectrum estimation with the Burg method. The results show that, under the combined action of industrial structure optimization and adjustment and water-saving technology improvement, the differences of water use efficiency between the three areas of the region were gradually narrowing, showing the effect of coordinated development in the Beijing-Tianjin-Hebei region, but there were still significant development differences. The overall water use efficiency in Beijing and Hebei showed an increasing trend, and the growth rate of Hebei (0.16) was significantly higher than that of Beijing (0.07). The overall water use efficiency of Tianjin showed a decreasing trend (-0.03), which was mainly reflected in the increase of water consumption per 10000 yuan of GDP and water consumption per 10000 yuan of industrial added value (0.18, 0.19). In addition, water use efficiency in Beijing as a whole presented a cycle of about 5-year (77 dB) and 3-year (73 dB), while water use efficiency in Tianjin as a whole presented a cycle of about 7-year (88 dB) and 2-year (81 dB). Compared with Beijing and Hebei, Tianjin's comprehensive water use efficiency was more cyclical, which means that its internal cycle can be used to regulate the changing trend of water use efficiency in a timely manner.

Key words: water resource use efficiency, power spectrum density, variation characteristics, Beijing-Tianjin-Hebei region

YAO Tingting, LIU Suxia. Comparison of the variation characteristics of water resource use efficiency indicators in the Beijing-Tianjin-Hebei region[J].PROGRESS IN GEOGRAPHY, 2021, 40(7): 1195-1207.

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Comparison of the variation characteristics of water resource use efficiency indicators in the Beijing-Tianjin-Hebei region

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指标	北京	天津	河北	区域平均
万元GDP用水量	10	10	10	10
万元工业增加值用水量	9	9	9	10
管网漏损率	9	9	9	10
人均日生活用水量	9	9	9	10
污水处理率	10	10	10	10
WUE	10	10	10	10
指标平均	10	10	10

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