Study On The Optimization Method Of Green Ecological Network In Central Urban Area Of Beijing Based On Habitat Quality Evaluation

The country and society began to pay attention to and think about a series of ecological problems brought about by the rapid development and expansion of cities,including the fragmentation of urban habitats and the reduction of biodiversity.Based on this,urban construction began to transform to green development,and biodiversity conservation during this period The restoration and protection of the city have been focused on,and the construction of green spaces has begun to emphasize systemization,and the integration of multiple disciplines has provided a guarantee for urban planning and construction.Through a large number of theoretical research,this paper combs the basic construction methods of ecological network,and obtains its scientific optimization process as follows: current situation interpretation-source selection-corridor construction-optimization;By combing the influencing factors and evaluation contents of environmental quality,and studying and comparing the evaluation methods,this paper constructs a comprehensive evaluation system of urban ecological space habitat quality,complements the evaluation methods of habitat quality,and makes up for the research gap in the construction of urban ecological space habitat quality evaluation system;This paper constructs an ecological network optimization model of central urban area based on habitat quality assessment.The model is as follows: Based on land use data,coupled with MSPA and in vest model analysis,with landscape connectivity index method and index evaluation method as auxiliary methods,extract the ecological source and construct the current ecological network;Coupling invest model and MCR minimum path method,landscape connectivity index is used as auxiliary method to extract potential ecological corridor and construct potential ecological network;Overlaying the current ecological network and potential ecological network to obtain an optimized ecological network.In addition,this study uses the model to optimize the ecological network of the central urban area of Beijing,increasing the potential corridor.The total potential ecological corridor is 962.77 km,identifying 13 potential stepping stone corridors and 8 key ecological nodes,which makes the ecological network of the central urban area of Beijing better α The index increased by 0.52,β The index has increased by nearly 1,γ The index is increased by 0.55,which indicates that the ecological network is optimized by the model,and verifies the scientificity of the method model and the practicability of guiding urban planning.Certain urban green space planning methods and the basis for guiding biodiversity habitat protection can be provided by the model,so the model can be used to guide the construction of urban green ecological networks.