基于最大互信息系数的城市节水驱动因素分析.

In order to further optimize the urban water-saving evaluation system and provide effective reference for the establishment of regional water-saving evaluation system and the prediction of water-saving potential, this paper analyzed the temporal and spatial evolution trend of urban water use and water saving in six provinces (cities), including Beijing, Tianjin, Shandong, Shanxi, Hebei and Henan province from 2006 to 2018, and adopted the maximum mutual information coefficient algorithm to evaluate the mutual correlations between each urban water use indicator, excavated the deep relationship between these indicators, and identified the key drivers of water saving development. The results show that total water consumption in the study area shows an increasing trend, and the water structure is changing from production and operation water to household water. The proportion of household water consumption is increasing, while the proportion of production and operation water consumption is decreasing. The amount of water saving is mainly contributed by industrial water saving during the studied range, while the importance of domestic water saving is gradually enhanced. The correlation between regional population size, economic development level and water saving is stronger than the correlation between per capita water resources and water saving. Compared with technological progress, the improvement of the comprehensive efficiency of industrial water use brought about by the adjustment of the industrial structure has a more significant effect on promoting industrial water saving. The urban water supply system and wastewater treatment system are highly compatible with the economic scale, but the leakage loss rate of water supply network and the utilization level of reclaimed water are not compatible with the current development stage. There still has space for promotion in the leakage loss control of urban water supply networks and the replacement of unconventional water sources. [ABSTRACT FROM AUTHOR]