Study On Pattern Optimization Of Land Use Based On Ecological Security

In recent years,with the advent of “anti-planning”theory in recent years,exploring the simulation allocation scheme of land use change from the perspective of ecological protection has gradually become a hot topic in current academic research.With the deterioration of the ecological environment,coordinating the sustainable development of man and nature and promoting the construction of ecological civilization have become an urgent problem to be solved.Due to the destruction of the ecological environment,the problems of water and soil,water shortage,desertification and the sharp decline of biodiversity are becoming more and more obvious.Changchun is located in the black soil zone of northeast China.As an important grain producing area,it is more important to ensure food security and ecological security.The pattern of ecological security is based on the analysis of the driving factors of a single ecological problem.It quantitatively analyses the possibility of occurrence of various ecological problems and the sensitivity of the ecological environment after being disturbed by the outside world.Combining with land use and ecological locality,it provides the basis for“sticking to green development and striving to improve the ecological environment”proposed by the Eighteenth National Congress of the Communist Party of China,and also combines land benefits.The model of prediction and simulation is used to optimize the allocation of future land use and to construct the optimal pattern of land use based on ecological security.This study combines the existing ecological environment problems in Changchun: soil erosion,water shortage,biodiversity reduction and“three modernizations”,builds a comprehensive security pattern based on GIS platform,simulates the current situation and trend development scenario of Changchun in 2025 with CLUE-S model,and optimizes the allocation and development scenario of ecological security.Based on Fragstats platform,the related theories of landscape ecology are used to carry out various kinds of scenarios.A comparative study of the development scenarios and the corresponding countermeasures and suggestions for the future land use development in Changchun City in 2025 are put forward,the results are as follows:(1)Based on Soil and water conservation,water conservation,biological protection and“three modernizations”security,this study divides the comprehensive ecological security pattern of Changchun into three security levels: high,medium and low.The results show that the study area is in a low ecological security area of about 8.7% of the total area,which is more sensitive and vulnerable to external disturbances.The proportion was 26.5%.(2)Using CLUE-S model to simulate the land use of Changchun in 2015,the simulation results show that the Kappa coefficient is 82.6%.It shows that the model has a good prediction effect on the land use development of Changchun,and can carry out multi-scenario simulation.Combining basic farmland protection and ecological security protection,the scenario results of Changchun's optimal allocation based on Ecological security in 2025 are obtained.(3)Based on the theory of landscape ecology,the spatial distribution,connectivity and fragmentation of landscape patches of different simulated scenarios are analyzed and compared.The results show that the optimal allocation results are reasonable and feasible.The optimal allocation scenarios based on ecological security in Changchun in 2025 are more comprehensive than the current trend,including cultivated land protection and habitat protection.Entering the scope of consideration,it can reasonably and effectively alleviate the current situation of the rapid transformation of cultivated land into construction land,and enhance the ecological connectivity between land use in Changchun in terms of ecological space.