| With the rapid growth of population and economy,water scarcity has become an important factor hindering the sustainable economic and social development of cities in the Yangtze River Delta.Therefore,it is urgent to control domestic water consumption and improve the domestic water management system in the Yangtze River Delta.Existing studies have explored the spatial and temporal variation of domestic water consumption and its influencing factors,but they are not comprehensive enough and ignore the influence of some key factors.In this context,China issued the National Water Conservation Action Plan in 2019,which focuses on the policy of "double control of total volume and intensity" and requires all sectors of society to accelerate the construction of a water-saving society.In order to achieve the goal of double control,the Yangtze River Delta region must grasp the spatial and temporal characteristics of domestic water consumption,identify its influencing factors,including their influence direction and degree,and then take targeted measures.In view of this,this thesis takes 41 cities in the Yangtze River Delta as the study area,and takes 2010-2020 as the study period to obtain panel data.Firstly,the study is carried out from the perspective of total domestic water consumption to analyze the spatial and temporal changes of urban domestic water consumption in the Yangtze River Delta.Furthermore,the spatial transfer coefficient is used to partition the 41 cities in the Yangtze River Delta,and the LMDI method is used to analyze the influencing factors of domestic water consumption.Secondly,this study focuses on domestic water intensity.Based on the calculation of domestic water intensity,the spatial distribution pattern of domestic water intensity is explored by using cluster analysis and quadratic diagram.Next,the spatial correlation and the convergence of domestic water intensity are further verified by using Moran index and convergence model.Finally,after clarifying the spatial correlation of domestic water intensity,the most appropriate spatial panel econometric model is selected through model testing to analyze the influencing factors of domestic water intensity.The main conclusions are as follows:(1)The results of LMDI decomposition of domestic water consumption indicate that the urban domestic water consumption in the Yangtze River Delta presents the spatial characteristics of "high in the east and low in the west","high in provincial capitals and low in the other cities".Most cities are in the transition zone of domestic water consumption.Economic and technological effects are the dominant factors that promote and suppress domestic water consumption,respectively.Population mobility can bring changes in domestic water consumption.The public service water consumption is more sensitive to the changes of various factors.(2)The results of research on the spatial distribution pattern and convergence of domestic water intensity show that the domestic water intensity is "high in central and southern cities,and low in northern cities",and has spatial correlation.Over time,the gap of domestic water intensity between cities in the Yangtze River Delta will be narrow,ultimately converging to the same stable level.(3)The results of research on the influencing factors of domestic water intensity indicate that the spatial spillover of domestic water intensity between cities generally presents a competitive substitution effect.There is a household scale effect on the urban domestic water intensity in the Yangtze River Delta region.The increase in temperature and urbanization level will increase the domestic water intensity.The more elderly people and children in the household,the lower the domestic water intensity.Water scarcity can lead to a decrease of the domestic water intensity.Based on the above conclusions,this thesis puts forward targeted policy recommendations.Urban clusters should formulate joint water conservation plans,guide residents to form water-saving lifestyles,and carry out in-depth water conservation in public services.It is necessary to insist on double control of the total amount and intensity of domestic water consumption,realize the transition from extensive to intensive domestic water consumption,and take a new urbanization path. |
