The purpose of the study is to generate traffic air information system） to determine a proper zone of AQMS （air analyzed were carbon monoxide （CO）, and nitrogen oxides （NOx） pollution map using mathematical mode...The purpose of the study is to generate traffic air information system） to determine a proper zone of AQMS （air analyzed were carbon monoxide （CO）, and nitrogen oxides （NOx） pollution map using mathematical model and GIS （geographic quality monitoring station） in municipality area. The pollutants which can be harmful to people living in the area. The three steps of mapping process were performed under the GIS environment using the existing vehicle emission rates and pollutant dispersion model. First, traffic volume, road network, and the emission rates of road segments varying with types of vehicle were collected from existing data. Second, the pollutant concentrations were calculated by use of CALINE4, a tool with Gaussian dispersion model. The model parameters include emission rate, wind directions and speeds, ambient temperature and observed pollutant concentration, and atmospheric stability during all seasons from the January 1, 2010 to May 31,2011 with regardless the rainy season. This resulted in concentrations at many receptor points along links of the road network. Third, distributions of pollution concentrations were generated by means of the spatial interpolation of those from receptors. The results of pollution raster-based maps are used for determining frequency of violence and combined pollution map. The resulting frequency of violence and intensity concentration will be further integrated to determine a potential area of AQMS. Finally, achieving pollution potential area of AQMS can be located as helpful basic data for efficient traffic and transportation planning.展开更多
Due to the complicated unfavorable geology in LumTakong Reservoir section of Bangkok-Nakhon Ratchasima high-speed railway in Thailand, the influencing factors of route scheme comparison are complicated, and the scheme...Due to the complicated unfavorable geology in LumTakong Reservoir section of Bangkok-Nakhon Ratchasima high-speed railway in Thailand, the influencing factors of route scheme comparison are complicated, and the scheme selection is difficult. By means of geological condition analysis and engineering economic and technical comparison, this paper discusses in detail the types, scale, distribution characteristics, genetic mechanism and so on of bad geological bodies, and evaluates the stability of bad geological bodies and their influence on the proposed high-speed railway. Through comprehensive analysis of various geological and engineering economic and technical conditions, the scheme of avoiding bad geological areas in situ is finally determined as a reasonable route scheme.展开更多
文摘The purpose of the study is to generate traffic air information system） to determine a proper zone of AQMS （air analyzed were carbon monoxide （CO）, and nitrogen oxides （NOx） pollution map using mathematical model and GIS （geographic quality monitoring station） in municipality area. The pollutants which can be harmful to people living in the area. The three steps of mapping process were performed under the GIS environment using the existing vehicle emission rates and pollutant dispersion model. First, traffic volume, road network, and the emission rates of road segments varying with types of vehicle were collected from existing data. Second, the pollutant concentrations were calculated by use of CALINE4, a tool with Gaussian dispersion model. The model parameters include emission rate, wind directions and speeds, ambient temperature and observed pollutant concentration, and atmospheric stability during all seasons from the January 1, 2010 to May 31,2011 with regardless the rainy season. This resulted in concentrations at many receptor points along links of the road network. Third, distributions of pollution concentrations were generated by means of the spatial interpolation of those from receptors. The results of pollution raster-based maps are used for determining frequency of violence and combined pollution map. The resulting frequency of violence and intensity concentration will be further integrated to determine a potential area of AQMS. Finally, achieving pollution potential area of AQMS can be located as helpful basic data for efficient traffic and transportation planning.
文摘Due to the complicated unfavorable geology in LumTakong Reservoir section of Bangkok-Nakhon Ratchasima high-speed railway in Thailand, the influencing factors of route scheme comparison are complicated, and the scheme selection is difficult. By means of geological condition analysis and engineering economic and technical comparison, this paper discusses in detail the types, scale, distribution characteristics, genetic mechanism and so on of bad geological bodies, and evaluates the stability of bad geological bodies and their influence on the proposed high-speed railway. Through comprehensive analysis of various geological and engineering economic and technical conditions, the scheme of avoiding bad geological areas in situ is finally determined as a reasonable route scheme.
