欢迎来到天天文库
浏览记录
ID:5326544
大小:391.02 KB
页数:6页
时间:2017-12-08
《北京市道路绿地对pm2.5浓度分布与消减作用的影响》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、第42卷第6期湖北林业科技Vol_42,NO.62013年12月HubeiForestryScienceandTechnologyDec.,2013北京市道路绿地对PM2.5浓度分布与消减作用的影响王月容李延明李新宇赵松婷郭佳(北京市园林科学研究所,园林绿地生态功能评价与调控技术北京市重点实验室北京100102)摘要:选择北京市典型道路绿地类型为试验监测点,对0,6,16,26,36m不同绿带宽度下PM2s浓度分布、消减能力及与气象因子的关系进行了研究。结果表明:道路绿地空气中Ps浓度的日变化均呈现双峰单谷型特征,即早晚高、白天低,最低值出现在午后14:O0左
2、右,最高值出现在晚高峰2O:O0左右;0,6,16,26,36m绿带宽度下PM25浓度平均值分别为46.64,44.35,42.91,4O.96lg·m和41.97pig·m_。,以26m绿带宽度最低,0rrt最高;无污染或轻度污染(PM2<115g·m)天气条件下,绿地对PMzs消减作用十分明显,26rn的绿带处消减作用最强,最高可达28.oX;中度污染及以上(PM2s>115·m)天气条件下绿地对plvl2s消减作用不明显;plvl~s浓度与气象因子中的温度、风速成负相关关系,与相对湿度成正相关关系。关键词:PM2s浓度分布;消减作用;道路绿地中图分类号:
3、X513,X831文献标识码:A文章编号:1004—3020(2013)06—0004—06TheEffectsofRoadGreenSpaceonConcentrationDistributionandSubductionofPMe.5inBeijingCityWangYuerongLiYanmingLiXinyuZhaoSongtingGuoJia(BeijingInstituteofLandscapeArchitecture,BeijingKeyLaboratoryofEcologicalFunctionAssessmentandRegulationTe
4、chnologyofGreenSpaceBeijing100qo2)Abstract:Throughselectingtypicalroadgreenspaceasexperimentalmonitoringpoints,PMz5concen—trationdistribution,subductionanditsrelationshipwithmeteorologicalfactorswerestudiedunderdiffer—entgreenbeltwidthsof0,6,16,26mand36m.Theresultsshowedthatdiurnalv
5、ariationcharacteristicsofPM25concentrationinroadgreenspaceswasdescribedbythedoublepeakandsinglevalleycurve,whichwerehighinmorningandnightandlowindaylight。andthehighestvaluesin20:00andthelow—estvaluesin14:00.TheaveragevaluesofPM25concentrationindifferentgreenbeltwidthsof0,6,16,26mand
6、36mwere46.64,44.35,42.91,40.96/*g·m。and41.97tag·mrespectively,whichthelowestconcentrationoccurredin26mandthehighestin0m.Undertheweatherconditionofnon-poilu—tionorslightpollution(PM25<115g·m。),thesubductioneffectofgreenspacesonPM25concentra—tionwasveryobviousandgreenbeltwidthof26mhad
7、thebestsubductioneffectby28.O%.Undertheweatherconditionofmoderatepollution(PM25>115g·m。),however,thesubductioneffectwaslimited.Thewindspeed,airtemperatureandhumidityareallinfluencingfactorsonPMz5concentrationvariation.ThereexistednegativecorrelationbetweenPM2jconcentrationandairtemp
8、erature,windspeed,a
此文档下载收益归作者所有