Predict Of Diferent Meteorological Scenarios On SO₂Ground Concentration Based On Aermod Model

In a certain extent, meteorological data can not fully meet the request of theTechnical Guidelines for Environmental Impact Assessment AtmosphericEnvironment（HJ2.2-2008） for the one level, two level Environmental ImpactAssessment projects. It often need increase meteorological observation or use themesoscale meteorological model output data. In order to reduce the environmentalimpact assessment process,it is very necessary to use alternative conventional andunconventional meteorological data for the air pollutant concentration prediction inthe feasibility.The article use conventional, unconventional meteorological data. Define themeteorological conditions of project location as the standard meteorological scenario,and design7contrasting meteorological scenarios, and same of point source SO2data and terrain data.Based on AERMOD model, and predict SO2groundconcentration of different meteorological scenarios.Use the evaluation method ofrelative error method, consistent with the index method, maximum comparisonmethod, and study the feasibility of contrast meteorological scenario instead ofstandard meteorological scenario.By the effects of ground meteorological scenarios results,the least surfacemeteorological information can instead of standard meteorological scenario.Unconventional observation cloud may replace standard meteorological scenariocloud. Distance more than50km from national baseline climatological station toproject location, and national baseline climatological station cloud, visibility mayreplace standard meteorological scenario cloud, visibility, but other meteorologicalelements can not replace standard meteorological scenario corresponding elements.By the effects of high-altitude meteorological scenarios results, unconventionalreanalysis meteorological data may instead of standard meteorological scenario. To acertain extent, distance more than50km between conventional high-altitudemeteorological station and project location, conventional high-altitudemeteorological scenario may instead of standard meteorological scenario.Lack ofhigh-altitude meteorological data is not allowed.The results may provide the scientific basis for selecting meteorological data tothe atmospheric environmental impact assessment process.