Evaluation Of Land Comprehensive Carrying Capacity And Obstacle Factors Diagnosis Based On Catastrophe Series Method

In recent years,due to the accelerating urbanization process,it has caused serious consumption of natural resources,which has led to a deepening of the inconsistency and mismatch between natural resources and social development,and the comprehensive land bearing level has been decreasing.The comprehensive carrying capacity of land is the carrying capacity of the land to human activities under the joint action of socio-economic and ecological environment at a specific time and in a specific area.In the new era,the prerequisite for achieving coordinated development of ecological civilization and economic society is to find out the comprehensive bearing level of regional land,understand the relationship between social development factors and natural resources,and promote the coordinated development of the two.Use planning to provide premises and foundations.Xi’an is the largest central city in Northwest China,and it has developed strongly in recent years,becoming China’s fifteenth largest city.However,compared with national capital cities and sub-provincial cities,the total economic volume is still at a medium level.Faced with the gradual depletion of resources and the deterioration of the ecological environment,the comprehensive land bearing of Xi’an faces challenges.This paper takes Xi’an as a research area,and builds a comprehensive land carrying capacity evaluation index system from four aspects of land resources,ecological environment,economic technology,science,education,culture and health,and measures the change of land comprehensive carrying capacity from 2009 to 2018 based on the catastrophe model;using barrier factors Diagnose the model,explore the indicators that hinder the development of comprehensive land carrying capacity,and make recommendations for improving the comprehensive land carrying capacity of Xi’an according to local conditions.The main conclusions of this article are as follows: 1.The comprehensive land carrying capacity of Xi’an is at an intermediate level,with a slight fluctuation between 0.44 and 0.53 during the study period;2.The carrying capacity of land resources declines year by year,and the carrying level changes from good to intermediate carrying,ecological The situation of environmental carrying capacity is slightly grim,showing a clear downward trend,the economic and technological carrying capacity is fluctuating and rising,and the development momentum is good.The carrying capacity of the science,education,cultural and health system is gradually increasing,and the carrying capacity is intermediate carrying capacity;III.2009-2011,affecting the comprehensive land Carrier capacity barrier factors are distributed in the science,education,culture and health system.The main barrier factors are the number of participants in organized cultural activities and the number of medical institutions.The main limiting factors from 2012 to 2014 are the degree of water and soil coordination and the amount of water resources per capita,distributed in the land resource system,2015— In 2018,the top three per capita arable land area,comprehensive utilization rate of industrial solid waste,and GDP growth rate ranked in the top three in obstacle degree.