Influencing factors of domestic water and water conservation potential in the water import areas of the South-to-North Water Transfer Project
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Abstract:
The South-to-North Water Transfer area was one of the serious shortage of water resources in China. To continuously promote the work of water resources conservation and ensure the sustainable economic and social development of the South-to-North Water Transfer area, it is of great significance to track and evaluate the current situation of domestic water use in the water demand area in real-time, analyze the influencing factors and existing problems of domestic water use in all provinces and cities in the water demand area, and further tap the potential of domestic water-saving, to promote the water-saving management in the water demand area and improve the utilization efficiency of water resources in the South-to-North Water Transfer Project.This study was conducted based on a questionnaire survey on residents' water consumption habits and adopted a multiple linear regression method to analyze the current situation and differences in household water consumption in provinces and cities in the eastern middle route of the South-to-North Water Transfer Project, identified the main influencing factors of domestic water consumption, and designed water-saving scenarios to simulate the water-saving potential of households.The results show that :1. There were obvious regional differences in the water consumption habits of residents in the eastern middle route of the South-to-North Water Transfer Project. In some northern provinces, Henan, Shandong, Tianjin, and other provinces, the number of people who use water prudently accounts for 27% to 40%, and the per capita domestic water consumption was relatively low. Anhui Province, Jiangsu Province, and other southern provinces and cities account for more luxury water users, about 26%-35%. From the perspective of water consumption behavior, the bathing link accounts for the largest proportion of 45%, which was also the main link causing the difference in water consumption among provinces and cities, and the main segment causing differences in residential water use between provinces and municipalities. The range of fluctuations in water use for domestic bathing was the largest, and the difference in daily per capita bathing water use was over 30%, which was the main segment causing differences in water use. 2. Through the establishment of a multiple linear regression model to analyze the influencing factors of residents' water-saving awareness, it was found that residents' water consumption was greatly affected by multiple factors, such as age, gender, household resident population, income level, personal water consumption habits, and water use equipment. Residents with a high level of awareness and knowledge of water conservation use less water for domestic purposes. Residents who were aware of their water use and local water prices generated less water in the course of their use. 3. The simulation results of water-saving scenarios showed that under the comprehensive water-saving scenario of improving residents' water-saving awareness, adopting rational utilization of wastewater, and replacing water-saving appliances with class I water efficiency, the daily water consumption per capita in the water receiving area could be reduced by about 12%-29%.
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