| The thesis selects Taiyuan city as the research region.Taiyuan is an important energy base and the air pollution is extremely serious.On the bases of the other scholars' methods,the air pollution data from Taiyuan Environmental Protection Institute and the meteorological data from Taiyuan, Shanxi Observatory were used to analyze the dynamic characteristics of air environmental pollution.The main research contests and the conclusions were described as follows.(1)Based on the secondary standard of the State Environmental Air Quality(GB3095-1996),changing trends of air contaminates were studied by Spearman rank related coefficient rs,the spatial distribution of air contaminates were analyzed by clustering analysis.The primary contaminates were PM10 and SO2 in Taiyuan.The pollution degree of the air contaminates lightened from 2001～2005,but it aggravated in 2006 except CO.The changing regulation of air contaminates in a year and the alternative variety of heating and non-heating period basically fitted together.During the research time,PM10,SO2 and NO2 concentration proportion of heating period at its whole year basically presented descend trends while CO concentration proportion presented up-trends;the situation was the opposite during non-heating period.The air contaminates pollution existed different degree varieties.SO2 and NO2 polluted most seriously in Wucheng,PM10 and CO polluted most seriously in Jianhe.PM10,SO2 and CO polluted most lightly in Nanzhai.NO2 polluted most lightly in Jinsheng.(2)Adopted pollution load analysis to analyze the main air contaminates. Adopted Shanghai air quality index to evaluate the air quality.PM10 had gradually been the primary contaminate instead of SO2.PM10 was the primary contaminate except December and January.The air pollution was medium degree and reached warning level,the air quality was taking a favorable turn from 2001 to 2005,but it became bad in 2006.The air quality variety of different air monitoring stations was basically the same as the whole city.Jianhe and Wuchen were the most serious districts,Nanzhai was the lightest district.(3)The air pollution was caused by common function of natural and artificial factors.Special geography and meteorological condition made contaminates easy to accumulate and attain high air pollution level. Unreasonable distribution of industrial sources,coal as principle energy consumption and its great consumption strength made soot-type air pollution more serious.Dust was the important composition of PM10 and the main factor of the air pollution.More and more traffic pollution sources made NO2 difficult to control in recent years.Heating of living pollution sources was the main reason that the air pollution was more serious in winter than in spring, summer and autumn. |
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