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ID:32209696
大小:3.94 MB
页数:68页
时间:2019-02-01
《西安市空气污染物浓度统计特征与其气象影响分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、3.Fourcommonlyusedstatisticaldistributionmodelswereadoptedtoresearchtheoptimaldistributionofairpollutantconcentrationsindifferentseasonsandtypicalairqualityconditions,alsothemainparametersofthebestdistributions.Andusingthreegoodness-of-fitteststodetermine
2、theappropriatestatisticaldistributionmodelofairpollutantconcentrations,includingKS,ADandChi-squaredtest,respectively.4.TheinfluenceofmeteorologicalelementsontheairpollutantsconcentrationinXi'anwasstudiedusinglinearcorrelationanalysismethod.Theresultsindic
3、atedthatwindspeed,temperatureandmixedlayerdepthallshownegativecorrelationwithpollutionconcentrations,whileairpressureandatmosphericstabilityarepositivelycorrelatedwiththeconcentrationsofpollutants.5.Thepaperanalyzedanddiscussedthemeteorologicalconditionso
4、nsituationsofthe“best”and“worst”airquality.Itisconcludedthatairqualityisbetterwhenthereisheavyandcontinuousprecipitation.Whileseriousairpollutionwillappeareasilywhenthereisnoprecipitationwiththelowermixedlayerandhigheroccurenceofcalmwind.Besides,windspeed
5、istoolarge(morethanacertainthreshold)canalsocauseparticulatepollution.Keywords:airpollutantconcentrations;statisticalcharacteristics;meteorologicalelements;Xi'anIII目录第一章绪论....................................................................................
6、........................................11.1研究背景......................................................................................................................11.2研究目的和意义..............................................................................
7、............................11.3国内外研究现状..........................................................................................................21.3.1空气污染物浓度统计特征的研究现状............................................................21.3.2空气污染物浓度与气象因素的关系.......
8、.........................................................51.4研究内容......................................................................................................................7第二章西安市环境概况.....................
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