Research On Land Ecological Security Evaluation Of Daqing City

Land ecological security is mainly reflected in the internal structure,function and external performance of the land ecosystem.The overall situation is in a balanced and healthy state,and ultimately maintains the long-term coordinated development of nature,society and economy.Therefore,land ecological security determines the sustainable development of mankind.However,with the rapid development of social economy,China's urbanization and industrialization process is strongly promoted,land pressure is increasing,which seriously jeopardizes the ecological security of land and leads to ecological security of land.The level of risk continues to rise.At present,land ecological security has become the main focus of research on ecological security issues.At the same time,the construction of ecological civilization is an important development concept of the country.It needs to be comprehensively considered from the aspects of economy,society,ecology and politics.Land ecological security is an important part of ecological civilization construction.In order to accuratel y grasp the current situation of regional ecological security,it is indispensable to propose improvement measures in a timely manner.Therefore,in order to make people more aware of the ecological security status of the land,adopt more effective protection measures,maintain the sustainable use of land,and carry out land ecological security evaluation is necessary.Based on the analysis of Daqing City's land use status and ecological status,based on the perspective of ecological civilization construction,this paper selects 18 indicators to construct Daqing City land based on the concept of “stress-state-response”(PSR)framework model.The ecological security evaluation index system,combined with entropy method and analytic hierarchy process to determine the optimal combination weight,using the comprehensive index method to evaluate the land ecological security status of Daqing City from 2006 to 2016 in time series,and use the obstacle degree model to explore 2006-The obstacle factor of land ecological security status in Daqing City in 2016.According to the research results,it is of practical significance to propose targeted recommendations to improve the level of land ecological security in Daqing City.The research results are as follows:(1)In 2006-2016,the comprehensive index of land ecological security in Daqing City showed an overall upward trend,rising from 0.536 in 2006 to 0.714 in 2016.The overall level change process is: Grade II-III-Level IV,Daqing City The overall situation of land ecological security has gradually improved.1)The overall trend of land ecological pressure safety value in Daqing City isroughly the same as the comprehensive value,and the overall trend shows an upward trend.The land ecological security pressure value increases from 0.212 to 0.223.Among them,from 2006 to 2010,the land ecological pressure value is The downward trend,the land ecological security pressure value in 2011-2016 is on the rise.2)The overall trend of land ecological security status in Daqing City is roughly the same as the comprehensive value,which is generally on the rise,and the safety value of land ecological status increases from 0.165 to 0.246.The land ecological security status of Daqing City showed a good development trend.3)The ecological security response value of Daqing City is generally on the rise,and the safety value of land ecological pressure is increased from 0.159 to 0.245.(2)Analysis of obstacle degree factors,with the aid of the obstacle degree model,analyze the main influencing factors of land ecological security in Daqing City during 2006-2016.1)Analysis of the level of obstacles in the criterion layer,the fluctuation of the degree of safety of the land ecological pressure increases,the safety of the land ecological state and the safety barrier of the land ecological response show a downward trend;2)the index factor barrier degree,the main obstacle factor of each year is not In the same way,the biggest obstacle factor transformation process is: the tertiary industry accounts for the proportion of GDP,the coverage rate of nature reserves,the proportion of soil erosion treatment area,the compliance rate of industrial wastewater discharge and the application amount of pesticides and fertilizers.(3)According to the evaluation results,from the three levels of reducing the ecological security pressure of the land,maintaining and improving the ecological security status of the land,and improving the ecological response capacity of the land,the scienti fic and rational application of pesticides and fertilizers,rational exploitation of oil,optimization of industrial structure,etc.Countermeasures and recommendations for land ecological security level.