Research On Quantitative Analysis Of Three-dimensional Green Quantity Of A University In Shenyang Based On UAV Remote Sensing Technology

Three-dimensional green biomass refers to all the stems and leaves of plants growing volume of space occupied and it can truly reflect the relative environmental benefits of green ecological entity.In order to accurately evaluate the campus greening level of Shenyang aerospace university,this paper selects the trees and shrubs in the campus of Shenyang aerospace university as the research object.Based on the statistics of field measurements and remote sensing images of UAV,a three dimensional green quantity calculation model of the main greening trees on campus of Shenyang University of Aeronautics and Astronautics was established.The relative equation of "crown diameter-crown height" and the formula of crown green quantity of the common greening trees in campus were obtained,and the three dimensional green quantity of the study area of campus greening was calculated quantitatively.comparing the three dimensional green value of different tree species in the campus and the difference of the three dimensional green values in the same tree species.The results showed as follows:1.The three dimensional green amount of tree species is much higher than that of shrub tree species,and the three dimensional green amount of broad-leaved tree species is larger than that of coniferous tree species.2.Vegetation age level as one of the factors to measure the growth of trees.Different age level,the diameter of the tree,the crown diameter,the crown height will be different,so the crown shape size will be different,the three-dimensional green value of the tree is different.The larger the age of the same species,the greater the three-dimensional green value of the tree species.The change of three-dimensional green value of different tree species varies with age level.3.For the same tree species,its size can directly affect the size of the tree species three-dimensional green quantity.The larger the crown diameter of the same tree species,the larger the three-dimensional green value of the same tree species.The three dimensional green values of different tree species varied with the speed of crown diameter.In general,while the three-dimensional green growth of deciduous tree grows faster,while the growth rate of evergreen tree species is slower.