Research On The Resource And Environment Carrying Capacity Based On The THREE-DIMENSIONAL Footprint Family

In this study,ecological footprint,water footprint,and carbon footprint are integrated to form a footprint family,and the three-dimensional footprint family model is constructed based on one-dimensional and two-dimensional models of each member of the footprint family.The article is mainly divided into three parts.Firstly,the ecological footprint,water footprint,carbon footprint,ecological carrying capacity,water resources carrying capacity,and carbon carrying capacity of the representative area were calculated by using the data of biological resources,water resources,and fossil energy from 2010 to 2018 in the Yangtze River Delta Eco-Green Integrated Development Demonstration Zone,and the current situation of representative area footprint and resource environmental bear capacity was analyzed.Secondly,the entropy weight method(EWM)is used to determine the weight of various footprints and ecological footprints,and then the footprints of different resources in the Yangtze River Delta Ecological Greening Development Representative area are calculated,which are compared with the evaluation results of resource and environment pressure index model.Finally,the gray prediction model is used to predict the resource environmental bear capacity in the representative area.The following conclusions are drawn:(1)From 2010 to 2018,the ecological resources,water resources,and fossil energy of the Yangtze River delta ecological greening development representative area are in deficit.Among them,cultivated land is the main component of ecological footprint,and the ecological carrying capacity is mainly composed of cultivated land and forest land.The fluctuation range of each bio-productive land is small,which indicates that the land structure of the representative area is relatively stable.The water footprint increased first and then decreased,among which the proportion of internal water footprint increased first and then decreased,while that of external water footprint decreased gradually.By 2018,the proportion of internal water footprint is as high as 80.27%,which indicates that the self-sufficiency rate of water footprint is80.27%,and the water resources carrying capacity also shows a continuously increasing trend.The overall trend of carbon footprint and carbon deficit is consistent,and both of them show a sustained growth trend.The consumption of raw coal is the highest in energy consumption,with an average proportion of 51.37%,but the energy consumption is still dominated by coal consumption.(2)Cultivated land,grassland,water area,and forest land occupy the stock capital in different degrees respectively,among which grassland occupies the most seriously.The footprint depth of ecological footprint,water footprint and carbon footprint in the representative area are all greater than 1,and the comprehensive resource utilization pressure in the representative area is gradually decreasing.Among them,the ecological footprint has the greatest pressure,followed by carbon footprint and water footprint,but carbon footprint began to replace water footprint as a resource with relatively less pressure in 2018.The ecological pressure index,water resources pressure index,greenhouse gas emission coefficient,and resources and environment pressure index of representative area are all greater than 0.8,which indicates that the resources and environment of representative area are always under high pressure.Among them,the ecological pressure index showed a gradual downward trend,the water resources pressure index showed a trend of rising first and then falling,the greenhouse gas emission coefficient was relatively stable,but it was still rising slowly,and the resources and environment pressure index showed a trend of rising first and then falling,and the overall pressure was very high.(3)The predicted value of the resource and environmental pressure index of representative area from 2019 to 2021 are 3.493,3.431,and 3.371 respectively,showing a slow downward trend.Among them,the forecast data of Qingpu District has been greater than Jiashan County,Wujiang District,and the whole representative area,while the predicted value of the resource and environmental pressure index of Wujiang District is the smallest,but still greater than 0.8,indicating that the resource and environment of representative area are still under high pressure.Therefore,in the future development,Qingpu District in the representative area needs to focus on adjusting the change and management of ecological footprint,water footprint,and carbon footprint;Jiashan County and Wujiang District need to optimize the utilization of ecological resources,water resources,and fossil resources and reduce their ecological footprint pressure,water footprint pressure,and carbon footprint pressure.Based on this,the pressure of resources and environment in the representative area can be alleviated,and the value of resource environmental bear capacity can be reduced so that the region can take the road of sustainable development.