Research On Emission Distribution Of P-BVOCs In Heng Yang And Landscape Design Application

Environmental pollution such as haze have been serious,causing great concern at home and abroad for volatile organic compounds.P-BVOCs is the main source of natural VOCs.However,the research on it is mainly focused on the study of single species or pure forest,and the selection of landscape plants is mainly based on aesthetic and horticultural standards.In the analysis of the global distribution and the emission in Heng Yang of plant BVOCs,the plant configuration was conducted from the aspect of P-BVOCs.On the basis of introduction of VOCs and BVOCs,at microscopic level,it contrasts and analyses three dominant composition determination methods of VOCs of living plant.Expound determination methods and conclusion of earlier stage and later stage,propose improvement suggestions on selection of methods.Macroscopic aspects,the existing major estimation models of BVOCs in urban areas and even nationwide are introduced.Compare study conclusion / critical factors and summarize where needs be improved.It provides the basis for improving determination system and improving estimating system.Experimental simulation part,it use the MEGAN model data to import Panoply,generate global isoprene(the main component of BVOCs)emission distribution for 12 months of 2010,and its reasoning by global annual change rule.It is divided into January-may,June-August,September-December,three significant emission stages.The maximum global emissions of 12 days is 1.98e-09kg/m2/sec appeared on May 1.It is found that the northern and southern hemispheric emissions are seasonal,and the plant of the equatorial portion is high in annual emissions due to the excellent growth status of the surface vegetation.In addition,the model is used to estimate the emissions of plant BVOC in Heng Yang by the data of vegetation,emission factors and climate factors.Isoprene emission in April 2016 was 5.7357 t.Its emissions related to the factors as temperature of plant growth.At the same time,the research will bring the plant BVOCs factor into landscape design,and guide the urban plant configuration from the overall level.Docking Heng Yang's green space system plan and a new round of urban plan,classifying plant BVOCs function,corresponding specific plants to all kinds of urban land,exerting the urban landscape BVOCs beneficial function to the urban population and environmental purification function,such as medical land plants in the function of sterilization,land for roads in the purification function of plant.It can optimize the urban tree species selection and landscape design mode,effectively enhance the plant BVOCs of ecological function,build good environment effect of urban space,effectively reduce atmospheric pollution of the environment is of great significance.