Research Of High Spatial-Temporal Resolution Motor Vehicle Emission Inventory System Based On Bottom-Up

In recent years,the number of motor vehicles in China has continued to grow,and motor vehicle pollution has become one of the important sources of urban air pollution.The urban motor vehicle emission inventory is an important basis for studying urban motor vehicle pollution prevention,understanding specific sources of pollution,and analyzing the temporal and spatial distribution and characteristics of pollution.Based on the research results of the establishment of relevant emission inventories at home and abroad,this study uses MATLAB visual programming technology to develop a bottom-up high spatial-temporal resolution vehicle emission inventory system.the system was used to establish and study motor vehicle emission inventories in the main road network area of Guangzhou.The main findings as following:(1)The road vehicle emission test based on the tunnel method was carried out on 9 typical vehicle types,and the vehicle emission factors under real conditions were obtained.By comparing with the vehicle emission factor calculated by the MOBILE-China model,it is found that the vehicle emission factor calculated in the improved tunnel experiment is relatively close to the model value.(2)Through the overall design,model design and system function design,comprehensive use of mathematical models,MATLAB visual programming technology and SQLite embedded database technology developed a bottom-up high spatial-temporal resolution motor vehicle emission inventory system.This system can be used to establish motor vehicle emission inventories in different cities and regions.(3)Using the bottom-up high spatial-temporal resolution motor vehicle emission inventory system to calculate the pollutant emission characteristics and temporal and spatial distribution regularities of Guangzhou's road network motor vehicles.The system can establish a vehicle emission inventory with a maximum temporal resolution of 1 hour and a maximum spatial resolution of 1 km×1 km.The system can display the result data in GIS,bar chart,line chart and pie chart.(4)According to the Net CDF file format required by the air quality model(such as CMAQ)and combining time and space parameters,the MATLAB programming language is used to compile the Net CDF file for motor vehicle emission data.