Methane dispersion from Halgheh- Dareh Using IPCC and AERMOD hybrid approach

Population growth and urbanization lead to mass production of waste. When municipal solid waste is landfilled, complex biological, chemical, and physical reactions occur that lead to greenhouse gas emissions. Methane is an important greenhouse gas, and the concentration of methane in the atmosphere is about 200 times lower than the concentration of di Is carbon monoxide, however, methane accounts for about 20% of heating. Emission of methane gas into the atmosphere will cause destructive environmental phenomena that reduce the stratospheric ozone of the ozone layer and over time increase the Earth's temperature. First, using the IPCC model, the amount of methane production in the Landfill of Halghe-Darreh in the study period from the beginning of 2015 to the end of 2019 is calculated and equal to 274.98 thousand tons of waste per year and the emission rate of methane gas in the landfill using the IPCC model. In the above time period is equal to 0.75 (g / sec). Then, the distribution of methane gas over a period of five years was investigated using the AERMOD model. The results showed that the distribution of methane gas with the AERMOD model for the whole landfill in the studied period in the northwest and southeast direction Around Landfill). Also, the maximum and minimum methane gas concentrations in the five-year period were 719.87 and 97.19 mg / cubic meter. Therefore, using two models, IPCC and AERMOD, the production and distribution of methane gas were calculated and the filling map up to 50 km of landfill was drawn.