A Estimation Model Of Tridimensional Green Biomass Established On GF-2 Remote Sensing Data

In this paper,through a combination of remote sensing and geographic information system technology,taking the Beijing Olympic forest park in chaoyang district as the research object,using the high score images of forest vegetation in the region are classified and extract the coniferous forest,broad-leaved forest,etc.,and the Tridimensional Green Biomass according to remote sensing inversion,combined with the field survey of real data,calculate the Tridimensional Green Biomass in the region.(1)Based on March 2016,a high score in June and August 2 images and landsat 8 August 2016,combining with the field survey of September and October,2016 for each wood gauging data,using principal component analysis and sampling method,the remote sensing estimation of target area,respectively based on the high score 2 images of broad-leaved and coniferous forest inverse regression model,use the surplus samples are used to verify the data verification,the accuracy of 85.03% and 80.40% respectively,combining with the experience at home and abroad,model precision reached 80% which meets the requirements,so the model meet the demand.(2)By establishing the model of image and high vegetation classification information,calculate the Olympic forest park of broad-leaved forest Tridimensional Green Biomass is 506899.34 m~3,coniferous forest Tridimensional Green Biomass is 215928.47 m~3,resulting from the Beijing Olympic park,the total Tridimensional Green Biomass is 722827.81 m~3.At the same time,it is can be concluded the north and the south gardens' vegetation distribution state,and the south garden has a lot of manual intervention,and the north garden area can be a developing space.(3)This study through the use of two important factors in the evaluation of vegetation ecological ecosystem carbon sequestration and air purification,they could be the factors of the Olympic park ecological benefit evaluation by the park carbon fixation effect and air purification effect,after it is concluded that the conversion for to reduce carbon dioxide from the air and PM10 has good effect,the ecological effects of 1.178 million yuan and 1.254 million yuan respectively.