城市森林凈化大氣功能分析及評價.pdf

1、中南林學(xué)院碩士學(xué)位論文城市森林凈化大氣功能分析及評價姓名：李曉閣申請學(xué)位級別：碩士專業(yè)：生態(tài)學(xué)指導(dǎo)教師：田大倫閆文德20050601碩士學(xué)位論文：摘要城市森林凈化大氣功能分析及評價ABSTRACTTwopairedexperimentalsiteswereestablishedinChangshaandZhuzhoucitiestoexplorethemitigationeffectsofurbanforestsonatmospheri

2、cpollutantsAteachexperimentalsite，therewerepairedplotsincludingurbanforestplotsandbarelandplotsInthisstudystandardmethodsformonitoringofairandwastegasessetbyNationalenvironmentprotectionbureauofChinawasemployedformonitor

3、ingandanalyzingThedynamicsofthemainairpollutants，thatis，S02，NOxandTSP，inthetwocitieshadbeenmonitoringforoneyear(200312004ComparisonsofmitigationcapacitiesoftheairpollutantswithindifferenttreespeciesweremadeAndbasedonthes

4、edataandcalculations，themainresultsandconclusionsweredrawnasthefollowing：(1)ThedailyvariationsintheconcentrationsoftheairpollutantsweresignificantbothincontrolaerasandintreatmentareasTheconcentrationsinthemorningwerehigh

5、erthanthatatnoon，andthenitincreasedtilltothelevelinthemorningintheafternoon，whichexhibiteda‘‘U”shape(2)TheconcentrationsofpollutantsvariedsignificantlywithseasonsineveryexperimentalsitesTheconcentrationsofpollutantsinthe

6、springandthewinterwerehigherthanthatofpollutantsintheautumnattheannualscale(3)Airpollutanthasobviousdifference(pO05)relatedtothefunctionofdistrict；Thepollutantdensityintheareawhichhascityforeststructureislowerthanthecont

7、rolwhichhasnocityforeststructure(4)TherewereobviousdifferencesintheairqualityamongthefoursamplingplotsAndthetwoplots、vithurbanforestwereclassedasIlevelinthetwocitieswhiletheothertwowereclassedasIIlevelGenerallytheairqual

8、ityinthetwocitieswasclassifiedas“Good”，accordingtothemonitoringresultsfromthefourplots(5)Formore，dustremovalmeasurementwastakenfor17treesspeciesinChangshaandZhuzhoucityinHunanprovinceTheresultsshowedthattherewereobviousl