Research On Water Resources Carrying Capacity And Coordination In The Yangtze River Delta Region

Water resource is the indispensable material foundation of human life and social and economic development.Due to the uneven spatial and temporal distribution of water resources in China,the high concentration of population and industry,and the deterioration of water quality in some areas,water resources have become one of the important constraints to China's social and economic development,which has seriously affected the normal life of the regional people and the sustainable development of social economy.As an important index to measure regional sustainable development,water resource carrying capacity has become the focus and focus of the research on water resource security and sustainable development.Based on this,this paper selects water resources carrying capacity indicators covering four aspects,including society,economy,water resources and ecology,to build an evaluation system,and constructs a comprehensive evaluation model of coefficient of variation method and grey relational degree method to comprehensively evaluate the spatial and temporal differentiation of water resources carrying capacity in the Yangtze river delta region.Finally,with the model of coordinated development,the variation law of the coordinated development of water resources carrying capacity system in the Yangtze river delta is analyzed,so as to provide some reference for the coordinated and sustainable development of water resources ecology in the social economy of the Yangtze river delta.The main research results are as follows:(1)Based on the establishment method of water resources carrying capacity evaluation index system based on a large number of literatures and related materials,in view of the prominent characteristics of water resources water scarcity in the Yangtze river delta,an evaluation index system of water resources carrying capacity in the Yangtze river delta based on the four-dimensional evaluation index of "socio-economic water-water-ecological" was constructed.(2)Build the coefficient of variation method--grey relational model tocomprehensively evaluate the carrying capacity of water resources in the Yangtze river delta region.The results show that the carrying capacity of water resources in the Yangtze river delta region is on the rise in time dimension.In the horizontal spatial dimension,the water resource carrying capacity of the cities in the Yangtze river delta varies greatly.The spatial distribution pattern of water resources carrying capacity is high in south and low in north.41 ground level above the Yangtze river delta city water resources carrying capacity was basically ?,?,which belongs to ? level in 11,belongs to the 30 cities of ? level standard,Yangtze river delta region of water resources and social economic basic in balance,water resources can basically meet the development of social economy.(3)Water resource carrying capacity is a complex system composed of multiple subsystems of water resources.By introducing the coordinated development model to calculate the degree of system coordination and the degree of coordinated development of water resources carrying capacity,the research on water resources carrying capacity is promoted to a deeper level.The results show that the degree of coordination in the time series of the water resources complex system in the Yangtze river delta region shows a slightly decreasing trend,and the degree of system coordination development shows an overall fluctuating trend,indicating that the development of water resources carrying capacity is the main driving force for the increase of the degree of system coordination development.The water resources carrying capacity system coordination degree of 41 cities in the Yangtze river delta region belongs to the quality coordination of 6 cities,good coordination of 27 cities,and intermediate coordination of 8 cities.The coordinated development degree of water resource carrying capacity system in 41 cities in the Yangtze river delta region is in the acceptable range,with 10 cities at the intermediate coordination level and 31 cities at the primary coordination level.(4)Finally,based on the analysis of some achievements,including the social,economic,water resources,ecological and other aspects of the reality of the Yangtze river delta region,put forward the sustainable utilization of water resources in the Yangtze river delta region.