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1、第37卷第6期南京林業(yè)大學(xué)學(xué)報(自然科學(xué)版)Vo1.37.No.62013年11月JournalofNanjingForestryUniversity(NaturalSciencesEdition)Nov.,2013河岸帶不同植被類型及寬度對污染物去除效果的影響李萍萍,崔波,付為國,朱詠莉,管永祥。(1.南京林業(yè)大學(xué)森林資源與環(huán)境學(xué)院,江蘇南京210037;2.江蘇大學(xué)農(nóng)業(yè)工程研究院,江蘇鎮(zhèn)江212013;3.江蘇省農(nóng)業(yè)委員會能源與環(huán)境保護站,江蘇南京210036)摘要:以太湖流域東戰(zhàn)備河自然河道為對象,比較分析了
2、4種植被類型及3m和6m寬度河岸帶分別對TN、NH4一N、TP和COD等4種面源污染物去除效果的影響。結(jié)果表明,不同植被類型對污染物的去除率受季節(jié)和污染物種類變化的影響。灌草植被河岸帶對面源污染物的去除率在全年內(nèi)均較高,草本植被對污染物去除率在夏秋季最高而冬季最低,喬灌草植被的去除率高于喬草。不同河岸帶寬度對污染物去除率的影響隨季節(jié)、污染物類型和植被類型而變化,表現(xiàn)為冬季大于夏季,TN大于TP,喬草大于灌草。總體來看,現(xiàn)行條件下4種植被除了對TN的去除率較低,全年僅為20%~40%外,對NH4一N、TP和COD的去
3、除率分別達(dá)到了20%一70%、50%~90%和40%一80%,去除效果顯著。關(guān)鍵詞:河岸緩沖帶;植被類型;植被寬度;污染物去除率中圖分類號:$718文獻標(biāo)志碼:A文章編號:1000—2006(2013)06—0047—06EfectsofriparianbufervegetationtypesandwidthOilpollutantremovalLIPingping,CUIBo。FUWeiguo,ZHUYongli,GUANYongxiang,(1.CollegeofForestResourceandEnviron
4、ment,NanjingForestryUniversity,Nanjing210037,China;2.InstituteofAgriculturalEngineering,JiangsuUniversity,Zhe~iang212013,China;3.EnergyandEnvironmentalProtectionStationofJiangsuProvinceAgriculturalCommittee,Nanjing210036,China)Abstract:Riparianbufferplayanimpo
5、rtantroleinimprovingandprotectingwaterqualityfromnon-pointsourcepollu-tion.Understandingtheriparianstructureandwidthiscriticalforitsfunctionandmanagement.Inthisstudy,theselect—ednaturalbuferswereintheDongzhanbeiRiverbasininDanyangcity.Theeffectsoffourvegetatio
6、ntypesandtwokindsofvegetationwidth(3mand6m)onTN,NH4+一N,TPandCODremovalwereassessedrespectively.There—sultsindicatedthatvegetationtypeshadsignificantefectonpollutant’Sremovalandtheremovalratiovariedwithdiffer—entseasons,vegetationsandpollutants.Theremovalvalues
7、ofshrub—herbbufferforthesefourpollutantswerehigherthantheotherthreevegetationtypesallthroughtheyear.Insummerandautumn,theremovalrateofriparianbufferwithreedwasthehighest.whileitwasthelowestinwinter.ItwasalSOdemonstratedtllatthepollutantremovalratesofripari-anb
8、uferwitharbor.shrub—herbwerehi【gherthanthatofarbor.herb.Theremovaleficiencyofpollutantsfordiferentbufferwidthsvariedwithseasons,vegetationandpollutanttypes.Anditwashigherinwinterth