Study On Ecological Carrying Capacity Of Land In Hefei City Based On Ecological Footprint

Land is a non-renewable resource,the most indispensable material carrier for human life,and the basic guarantee for sustainable development.Study the ecological carrying capacity of the land,understand the current land use structure,the extent and intensity of land use on the ecological carrying capacity of the study area.Under the guidance of sustainable development theory,system theory,human-land relationship theory,eco-city theory and land-based spatial planning theory,the related literatures are summarized to summarize the research and development of land ecological carrying capacity.Then,taking Hefei City as the research area,using the ecological footprint method,selecting the statistical data from 2011 to 2017 as the basic data,quantitatively analyzing the relationship between the per capita ecological footprint of Hefei City and the ecological carrying capacity of the land,mainly dravs the following research conclusions.:(1)Through analysis of each part of the per capita ecological carrying capacity,the per capita ecological carrying capacity of Hefei City is the largest,accounting for more than 70%per year,followed by construction land,accounting for about 26%s while other parts are very small.This is closely related to the type of land resources in Hefei.Through the analysis of time series,it can be seen that in the past seven years,the per capita building land carrying capacity of Hefei City has the largest increase,reaching more than 107%.It reflects the rapid expansion of construction land and represents the rapid development of urbanization in Hefei.(2)Through the analysis of the dynamic changes of per capita ecological footprint,per capita ecological carrying capacity and per capita ecological deficit in Hefei from 2011 to 2017,the per capita ecological footprint of Hefei City is much higher than the per capita ecological carrying capacity of the region.The growth trend of per capita ecological deficit is consistent with the growth trend of per capita ecological footprint,that is,the increase of per capita ecological footprint is the direct cause of ecological deficit.Fossil energy land accounts for the largest proportion of total,indicating the development of urban social economy,and the demand for energy has always been huge.(3)The per capita ecological footprint of Hefei City increased from 1.4162hm2/person in 2011 to 1.4888hm2/person in 2014.The ecological footprint increased rapidly in this stage.The main reason is that Hefei relies heavily on the secondary industry to develop the economy,fossil energy land and The proportion of construction land has increased year by year.According to the calculation data from 2015 to 2017,the per capita ecological footprint and fossil energy land use are decreasing year by year.This is because in recent years,Hefei has attached great importance to the development of science and education,and the advancement of science and technology has made energy utilization more reasonable..However,Hefei City has been in an ecological deficit state,from 1.3479hm2/person in 2011 to 4.283hm2/person in 2017.The ecological deficit has deteriorated severely,indicating that Hefei City is in a state of non-sustainable development,and people's ecological service needs have been It has exceeded the ecological carrying capacity.