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dc.contributor.authorCharusombat, Umarpornen
dc.date.accessioned2014-03-14T20:50:45Zen
dc.date.available2014-03-14T20:50:45Zen
dc.date.issued1998-12-14en
dc.identifier.otheretd-122398-171321en
dc.identifier.urihttp://hdl.handle.net/10919/36432en
dc.description.abstractTo solve traffic congestion in Bangkok, the Bangkok Mass Transit system (BTS) constructed an overhead rail system with 24 stations. The BTS train station, S2, in this study area covers Silom road and obstructs the air pollutant dispersion in a congestion area. The 1: 200 physical model of the buildings along Silom road with the train station, S2, was simulated in this research to determine the air pollutant dispersion in the train station area. A tracer gas (CO₂) was emitted from a simulated line source with emission rates of 0.383, 0.681, 1.293, 2.586, 5.177 and 10.77 mg/min to simulate actual pollutant emission rates. The CO₂ gas was sampled at 55 locations in the model. The Kriging method was used to interpolate the data in the study area. . Emission rates were used to make the difference between measured CO₂ in the model area and ambient CO₂ large enough to be differentiated. Regression Analysis was used to relate analytically the mass emission rate to the CO₂ concentration. The results indicate that the maximum CO concentrations exceed the 30 ppm Bangkok standard along the Southeast side of Silom Road at the passenger platform level. Drivers will acquire more harmful levels of CO than pedestrians at street level, especially near the Southwest end of the train station. NO₂ concentrations do not exceed the standard (0.17 ppm) at street level. The highest predicted VOC is 1.05 ppm. These results may be used in the future for numerical modeling study.en
dc.publisherVirginia Techen
dc.relation.haspartAPPENDICES1.PDFen
dc.relation.haspartv3.moven
dc.relation.haspartv6.moven
dc.relation.haspartthesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAir Pollution Dispersionen
dc.subjectCalm wind conditionen
dc.subjectTrain Stationen
dc.subjectWind Tunnelen
dc.titleAir Pollution Distribution under an Elevated Train Station (A Case Study of Silom Station in Downtown Bangkok)en
dc.typeThesisen
dc.contributor.departmentEnvironmental Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Engineeringen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineEnvironmental Planningen
dc.contributor.committeechairHughes, J. Martinen
dc.contributor.committeememberLittle, John C.en
dc.contributor.committeememberGallagher, Daniel L.en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-122398-171321/en
dc.date.sdate1998-12-23en
dc.date.rdate2000-01-01en
dc.date.adate1999-01-01en


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