Landscape Ecological Security Construction And Evaluation Research Based On LUCC And MCR Model

Ecological safety is no only the primary require for man preservation and development,but also the key part of country safety and other else safety.Protecting the regional and national ecological safety is the main job of the construction of ecological civilization in our country.In recent years,with the environment becoming more and more deteriorated,ecological safety is attached more importance by more and more countries and regions,which makes it as hot point in researchers.Through affecting regional environment,LUCC,which is short for Land Use and Land Cover Change,makes influence on ecological safety and changes local landscape pattern.Therefore,a healthy ecological safety and landscape pattern play a positive role in keeping and controlling eco-balance.As the core water source area for South-to-North water Diversion project,Yun Yang District is suffering great change of land use,which has caused a series of ecological problems.Yun Yang plays an important and fragile part in ecological niches,and this kind situation would lay a hidden troubles for the ecological safety and economic stainable development in future.With the help of LUCC and MCR model,this paper selects Yun Yang district,which has a fragile eco-environment,as the study object,conduct a survey of LUCC and evaluates its construction of ecological safety,improvement of landscape pattern.Combined with the MCR model,has carried out the regional LUCC based on land use/cover space-time evolution characteristics,evaluation of landscape ecology,ecological security pattern construction and the evaluation of landscape ecological security pattern of research.In this paper,the results can not only reveal the Yun Yang district LUCC change characteristics and landscape ecological effect,but also reflect the Yun Yang area ecological security status based on ecological security pattern building.Research on the application layer,by evaluating ecological security of Yun Yang district the land use evolution characteristics would be better understood,this can provide practical suggestions and scientific basis for ecological restoration and ecological planning,but also has important significance to the local economic development.The details are as follows:(1)to create landscape ecological security raster and vector database.Based on 2006,2009,2012 and 2015,four land use data,by reference to national standard for land classification and LUCC classification system,and combined with the characteristics of the local actual weight of land use types are classified,and carries on the standardization of data processing,at the same time collect DEM,geological disasters,scenic spots,forest parks,river system and wetland reserve in this paper,the raster and vector data,raster and vector set up in this paper,we study the landscape ecological security database.(2)land use temporal and spatial analysis model is established.From space,speed,time and number four changes process,the calculation of phase iv of the landscape to class dynamic,roll-in and roll-out rate,land utilization comprehensive index,average height and average slope,can good description changes LUCC process of yuyang district in nine years.(3)the landscape ecological effect dynamic analysis.By Fragstats3.3 software,the choice is of great significance to this article research the landscape index,calculate phase iv landscape pattern index,landscape dynamic analysis,and then through the calculation of distribution center of mass of plaque,to analyze the yuyang district landscape ecological security in time and space differentiation characteristics of the pattern,and further reveals the yuyang area landscape ecological effect.(4)build landscape ecological security pattern.To choose the appropriate "source",and establish the ecological security of each factor resistance surface,using the MCR model,construct comprehensive minimum cumulative figure,four period and phase iv safety grade standard variance partition graph,according to the GIS overlay function,build a comprehensive ecological security pattern of distribution.This paper mainly through the GIS technology,combining with the method of LUCC and ecological security pattern theory and method,the combination of MCR model based on the landscape ecological security pattern,it is concluded that the status of the ecological security in yuyang district of time and space distribution,it is ecological restoration and ecological planning for yuyang district have important guiding significance.