Influence Analysis of the Selection of Meteorological Reference Station on Results of AERMOD Model

Peng Wangminzi; Yao Lin; Wen Xinlong; Shen Jing

doi:10.16765/j.cnki.1673-7148.2017.02.011

Abstract：This paper selected the atmospheric environmental impact prediction work of Nanchang Economic Technical Development Area Planning as a case,compared the different meteorological reference stations,analyzed the impact of two different meteorological parameters on the results of AERMOD modeling and investigated the influence of meteorological conditions on the atmospheric diffusion.The results show that the selection of meteorological reference stations has a great influence on the atmospheric environmental impact prediction.The calculated results from two adjacent ground meteorological station show great difference which can reach several times and above.By comparing those individual weather factors such as wind speed,wind direction,temperature,humidity,pressure and cloud cover,the boundary parameters like the turbulent height of the stable boundary layer (SBL) and Monin-Obukhov length reflect more comprehensively the meteorological dispersion conditions and affect more directly to pollution dispersion models.The precise and representative meteorological data is a critical fundament for the environmental impact assessment (EIA).In the routine work of EIA,it should be fully investigated number,type,distance,topographic features of ground meteorological stations around the project by professionally weather analyzing.The meteorological station which can most represent the project should be chosen for the EIA and concentration prediction of the project.Local meteorological departments should also strengthen the observation and research of the vertical structure variation of urban and suburban atmospheric boundary layer,so as to provide more scientific basis for enhancing local air quality forecast accuracy,improving the atmospheric pollution control measures and optimizing the urban layout.