Study On Pattern Of Landscape Security And Fire Hazard In Miaofeng Mountain Forests,Beijing

Forest fire safety pattern aims to reduce forest fire risk,reduce fire loss and protect forest resources by studying the layout of forest vegetation types on the scale of landscape.The miaofeng mountains forest farm of Beijing as the study area,this study by using the combined method of remote sensing and geographic information system,the use of forest land use remote sensing image classification,analysis of different scales of forest landscape pattern characteristics and the small risk of forest fires,using multiple regression analysis,selection of suitable model of landscape index to build landscape forest fire danger and safety evaluation of three research areas of forest,forest landscape scales for further research on the construction of the space layout,reduce the risk of forest fire safety pattern to provide theoretical and technical basis.The following conclusions are drawn in this study:(1)The overall patch size of forest farm landscape type is different,the distribution is unbalanced,the landscape heterogeneity is not high,the landscape type fragmentation is serious;It can be seen from the calculation results of diversity index and landscape abundance density index that the overall diversity of landscape in miaofeng mountain forest farm is not high and the distribution of landscape types is relatively uniform.(2)According to the risk index classification,the corresponding landscape security can be classified as low security level(8-10),low security level(6-8),medium security level(4-6),relatively safe level(2-4)and extremely safe level(0-2).And the miaofeng mountains forest area and each scenic spot Laura ba to whole,meiyukou village,JiuFeng center and landscape forest fire danger index is between 2-4,you can see the fire safety level for safer.(3)NP,LSI,AREA_MN,PR and PRD are all negatively correlated with landscape forest fire risk.LPI,CONTAG and DIVISION are positively correlated with landscape forest fire risk.(4)To a certain extent,within a certain range,the greater the landscape fragmentation degree is,the more complex the patch shape is,and the smaller the average patch area is,leading to the reduction of forest fire risk.The larger the PR within a certain range,the more the number of patch types in the forest landscape,the safer the landscape.The landscape patch type is certain,the smaller the landscape area,the greater the PRD value,and the lower the risk of forest fire.To some extent,the higher the landscape spreading degree is,the better the forest connection degree is,the more extensive the fire is,the higher the forest fire risk is,the less safe the landscape is.(5)The security of forest landscape can be divided into five levels,namely,low security level(8-10),low security level(6-8),medium security level(4-6),relatively safe level(2-4)and extremely safe level(0-2).And the miaofeng mountains forest area and each scenic spot Laura ba to whole,meiyukou village,JiuFeng center and landscape forest fire danger index is between 2-4,you can see the fire safety level for safer.