Research On Matching Status Of Water Resources And City Scale In Beijing-Tianjin-Hebei Urban Agglomeration

Beijing-Tianjin-Hebei urban agglomeration is located in the region where fresh water resources are relatively scarce in China.It is the urban agglomeration with the most serious water shortage problem in China.Water resources has increasingly become an important bottleneck that perplexes and threatens the development of the region.Therefore,it is of great significance to analyze the spatial balance of water resources distribution and allocation in Beijing-Tianjin-Hebei urban agglomeration deeply and to strengthen the research on water resources allocation mechanism for the sustainable development of Beijing-Tianjin-Hebei urban agglomeration and Chinese social economy.This paper takes the spatial scale,population scale and economic scale of the core cities above 13 prefecture-level cities in Beijing-Tianjin-Hebei urban agglomeration as the research objects.The Gini coefficient is selected as a tool to quantify the matching of water resources,water consumption and spatial scale,population scale and economic scale in the BeijingTianjin-Hebei urban agglomeration on the urban agglomeration scale,and the concept of mismatching degree is introduced to further study the matching of water resources in the core cities of the Beijing-Tianjin-Hebei urban agglomeration on the urban scale.The calculation results of Gini coefficient and mismatch degree between urban water resources and spatial scale,population scale and economic scale show that the match between urban water resources and spatial scale,population scale and economic scale is poor on the scale of urban agglomeration.The spatial scale,population scale and economic scale of the cities in the Beijing-Tianjin-Hebei urban agglomeration are not affected by the endowment of water resources,and there is a general mismatch between urban water resources and urban scale in the cities in the urban agglomeration.The calculation results of Gini coefficient between urban water consumption and spatial scale,population scale and economic scale show that Beijing-Tianjin-Hebei urban agglomeration has basically matched urban water consumption with spatial scale,population scale and economic scale on the scale of urban agglomeration through water resources allocation.The calculation results of the mismatch degree between urban water consumption and spatial scale,population scale and economic scale show that the match between urban water consumption and urban scale in Beijing and Tianjin is the reason for the realization of water resources allocation on the scale of urban agglomeration.At the same time,in terms of city scale,11 prefecture-level cities in Hebei Province have not realized the matching of city water consumption and city scale.After the allocation of water resources,the mismatch degree of cities with relatively rich water resources has decreased and the matching situation has been improved.However,some of these cities have changed from cities with relatively rich water resources to cities with relatively scarce water resources.However,after the allocation of water resources,the negative value of mismatch degree becomes larger and the matching situation further deteriorates in cities where water resources are relatively scarce.The above research results show that the Beijing-Tianjin-Hebei urban agglomeration has long implemented a policy of giving priority to ensuring water use.Water resources in urban agglomerations are concentrated in Beijing and Tianjin.It has improved the matching situation between Beijing and Tianjin water resources and the city scale,but it has aggravated the problem of water resources mismatch in various cities in Hebei Province,sacrificing the development potential of various cities in Hebei Province.In addition,the lack of unified allocation of water resources in Beijing-Tianjin-Hebei urban agglomeration has aggravated the problem of unfair allocation of water resources in Beijing-Tianjin-Hebei urban agglomeration.