中国地质大学(武汉）CHINA UNIVERSITYOFGEOSCIENCESAtmospheric EnvironmentImpact Assessment
Atmospheric Environment Impact Assessment
Definitionair pollution: one kind of phenomenon: with theintroduction of any substance to the atmosphere resulted inthe changing of atmosphere in chemical, physical,biological orradioactive characters,thus affecting theeffective use of atmosphere, and endanger human bodyhealth or damage to the ecosystem
Definition air pollution: one kind of phenomenon: with the introduction of any substance to the atmosphere resulted in the changing of atmosphere in chemical, physical, biological or radioactive characters, thus affecting the effective use of atmosphere, and endanger human body health or damage to the ecosystem
source of atmospheric pollution point source (machine or exhaust funnel)scattering surface source (escorialline source (motor vehicle on road) volume source (femerell)
source of atmospheric pollution point source (machine or exhaust funnel) scattering surface source (escorial ) line source (motor vehicle on road) volume source (femerell)
The data we neededPollutantsourcedataLocalenvironment datapredominantwind directionpollutantnamewindspeed,(m/s)pollutantconcentration,(mg/m3)total cloud amount,(%)emission rate, (m3/s)lowcloudamount(%)heightofexhausttube,(m)diameter of exhaust tube, (m)surfaceairtemperature,(℃)air-pressure,(KPa)smoketemperature,(K)solaraltitudinalangle,(deg)solar dip angle, (deg)longitude, (deg)latitude,(deg)atmosphericstability（A/B/C/D/E/F)heightofatmosphericmixedlayer,(m)
The data we needed Local environment data predominant wind direction wind speed, (m/s) total cloud amount, (%) low cloud amount, (%) surface air temperature, (℃) air – pressure, (KPa) solar altitudinal angle, (deg) solar dip angle, (deg) longitude, (deg) latitude, (deg) atmospheric stability, (A/B/C/D/E/F) height of atmospheric mixed layer, (m) . Pollutant source data pollutant name pollutant concentration, (mg/m3 ) emission rate, (m3 /s) height of exhaust tube, (m) diameter of exhaust tube, (m) smoke temperature, (K)
Classification of atmosphericpollutants According to the existing form: particlespollutants and gaseous contaminants; Particle size less than 15 μ m pollutantscan be defined as gaseous contaminants Exhaust tube: various types of devicesthrough which the organization form of theatmospheric pollutants discharged
Classification of atmospheric pollutants According to the existing form: particles pollutants and gaseous contaminants; Particle size less than 15 μ m pollutants can be defined as gaseous contaminants. Exhaust tube: various types of devices through which the organization form of the atmospheric pollutants discharged
- ObjectsCivil pollutionIndustry pollutionSO2, NOx, NO2, CO, O3, TSP, PM1o, Pb, F, Odor,
Objects Civil pollution Industry pollution SO2 , NOX , NO2 , CO, O3 , TSP, PM10, Pb, F, Odor,
Air environmental quality --- 2 levelI level: national environmental protectiondistrict, special area;II level: populated area, the commercial.traffic and residents mixed area: cultural areaindustrial zone, rural area
Air environmental quality - 2 level I level: national environmental protection district, special area; II level: populated area, the commercial, traffic and residents mixed area; cultural area, industrial zone, rural area
Integrated emission standard of airpollutants (GB 16297-1996) Emissions limit of 33 kinds of air pollutant: Emission concentration limit of exhaustgas through exhaust tube;Discharge rate limit of exhaust gasthrough exhaust tube;Beyond any standard means enterprisesdischarge pollutant without permission orbeyond pollution limits
Integrated emission standard of air pollutants ( GB 16297-1996) Emissions limit of 33 kinds of air pollutant: Emission concentration limit of exhaust gas through exhaust tube; Discharge rate limit of exhaust gas through exhaust tube; Beyond any standard means enterprises discharge pollutant without permission or beyond pollution limits
Smoke Emission Model Establish coordinate systemcoordinatesystemsWindZA(plumb)iExhausttube(0,0,0)X(winddirection)
Smoke Emission Model Establish coordinate system coordinate systems Z Y X (wind direction) (plumb) Exhaust tube (0,0,0) Wind
Smoke Emission Modelnormalwindinesssmoke-plumeemissionmodel(U,o≥1.5m/s)Alongthewind,anypointontheground3DViewTop ViewWindWindSmoke(plumb)XOSmoke(x,y.0)(0,0,0)X(0,0,0)Xwinddirection)(winddirection)
Smoke Emission Model normal windiness smoke-plume emission model (U10≥1.5m/s) Along the wind, any point on the ground Z Y X (wind direction) (plumb) (0,0,0) Wind (x,y,0) 3D View Top View Y X (wind direction) (0,0,0) (x,y,0) Wind Smoke Smoke x y y x