Study On The Pattern Optimization Of Carbon Sink Land In Beibu Gulf Urban Agglomeration Under The Target Of Increasing Carbon Sink

Urban agglomeration is the main body of national new urbanization.Under the current environment of increasing carbon concentration,low carbon city planning is the only way to achieve regional low carbon development and ecological construction.Carbon sink land is used as the main land for absorbing carbon dioxide and reducing atmospheric carbon concentration in the land area.Most of the researches start from the perspective of emission reduction,and the research scope is relatively small.How to optimize the spatial layout of carbon sink land from the regional level of urban agglomeration,so as to achieve the goal of increase in foreign exchange rate becomes an indispensable research link of low-carbon spatial planning of urban agglomeration.From the perspective of increasing carbon sink,this paper discusses the spatial pattern optimization method of carbon sink land in beibu gulf urban agglomeration,and takes carbon sink land as the carrier to provide ideas for urban agglomeration low-carbon development research.Through remote sensing interpretation,the spatial distribution of carbon sink land and carbon sink amount in the beibu gulf urban agglomeration in multiple years were obtained,and the spatial variation of carbon sink land and carbon sink amount was obtained.The spatial layout of current carbon sink land was summarized based on the obtained data.Secondly,according to the carbon cycle process of coastal urban agglomerations,preliminary analysis of the spatial factors affecting carbon sinks,namely topographical features,land use types and morphological patterns,and correlation analysis with carbon sinks,leads to the following conclusions,elevation,slope overall positive correlation with the amount of carbon sinks,Higher average carbon sinks in the east,southwest,and northwest slopes,increasing vegetation in offshore areas is conducive to increasing carbon sinks,it is recommended to move cities in high altitude areas to low-lying areas in low altitudes and close to waters,farmland in the coastal areas migrates inland and increases the coastal backbone forest belt;the carbon sink capacity of the carbon sink land is forest land>shrub>grassland>unused land>water area,In response to a large area of grassland(including cultivated land),low-yield farmland is proposed to return to forests and internally increase the forest belt with high carbon sink capacity;the carbon sink land is complex in shape,irregular,and highly connected in space layout,and the carbon sink is high.Based on the above existing problems and spatial analysis,the spatial optimization strategy of coordination between carbon emission land and carbon sink land is proposed,and the specific spatial adjustment countermeasures are discussed in a problem-oriented way to build an ideal layout pattern for beibu gulf urban agglomeration.Based on spatial overlay analysis,ecological security pattern and ecological network planning method,the overall carbon sink optimization pattern of beibu gulf urban agglomeration is finally obtained and implemented on the adjustment of specific land use.