Evaluation of performance of photochemical smog modeling system for air quality management in Vietnam | |
| Author | Lai Nguyen Huy |
| Call Number | AIT Thesis no.EV-15-12 |
| Subject(s) | Air--Pollution--Evaluation--Vietnam Air quality--Evaluation--Vietnam Photochemical smog--Vietnam |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-15-12 |
| Abstract | Air pollution, including photochemical smog and particulate pollution in urban areas becomes emerging issues in developing, including Vietnam. There has not been a comprehensive study about surface ozone and PM level at the country level so far. This study aimed to develop a comprehensive emission inventory (EI) covering six major anthropogenic sources in Vietnam for the year 2010. Modeling tools (WRF/CAMx) was applied for simulation of ozone and particulate matter (PM) air quality in the country for one month in rainy season (August) and one month in dry season (December) of 2010. The major emission sources of emission covered in the EI included on-road mobile source, biomass opening burning, residential cooking, industry, thermal power plants and biogenic emission. The total annual emissions of SO₂, NOx, CO, NMVOC, CH4, NH3, PM10, PM2.5, BC and OC in 2010 were 630, 910, 16,027, 4,629, 575, 168, 1,048, 695, 95 and 296 Gg/year, respectively. WRF model performance showed acceptable behavior in this study. Meteorological parameters of temperature, wind speed, wind direction and relative humidity demonstrated moderate to good agreement for both quantitative and qualitative analysis. WRF/CAMx simulation results showed high ground-level ozone and PM concentration in surrounding areas of Hanoi and HCM City). The simulation results underestimated surface ozone levels at the Da Nang Station in August, but showed a better agreement with measured levels at Nha Be Station in December. The model underestimated the ozone concentration at Nha Be Station in December. For PM, model underestimated the concentrations at all stations for both seasons. In principle, the grid average model output of the O3 and PM levels was expected to be lower than point-measured levels. Emission of dust suspension from unpaved road and other natural sources (wind blow dust, sea salt, etc.) was not included which may be a cause of the underestimated result of PM. A comparison with satellite data shows good agreement in term of spatial distribution and with the wind field pattern. Statistical analysis showed that the model had a moderate performance when comparing with US EPA criteria for both ozone and PM evaluation. Further improvements in the EI and meteorological model as well as monitoring data are required for better model evaluation and application for air quality management. |
| Year | 2015 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Nguyen, Thi Kim Oanh; |
| Examination Committee(s) | Visvanathan, C. ;Shim, Shang-Gyoo;Loc, Thai Nguyen; |
| Scholarship Donor(s) | Deutscher Akademischer Austausch Dienst (DAAD), Germany;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2015 |