草坪系统对城市降雨初期径流氮污染控制作用.pdfVIP

of Journal 生态学杂志Chinese Ecology2009，28 1 ：23-26 草坪系统对城市降雨初期径流氮污染控制作用 孙书明1’2 单保庆1 彭万疆3 1中国科学院生态环境研究中心，北京100085；2中国科学院研究生院，北京100039； 3天津空港物流加工区水务有限公司。天津300308 摘 要 为了控制城市旅游区降雨径流污染，在武汉动物园鹿苑区构建草坪系统，研究了 草坪系统对城市降雨初期径流氮污染的控制与持留作用。结果表明：草坪系统使预处理后 NO，一．N 5％；水力负荷显著影响TN出水浓度和处理效率，进水浓度相近、水力负荷从 3．3cm·d-1升高到8．3 出水浓度，NH。+．N浓度随着草坪宽度增加而下降，而NO，一-N浓度变化趋势与之相反，DN 在流程10m处出现最低值。草坪系统在净化降雨初期径流的同时利用了营养盐和水资 源，降低了草坪维护的水肥投入。 √ i． 关键词 草坪；径流污染；氮；水力负荷 Rolesofurbanlawn in rainfall-inducedrunoff systemcontrolling nitrogenpollution．SUN ResearchCenter Sci- Eco—Environmental Shu．ruingl2．SHANBao．qin91。PENGWan-jiang’ 1 for Graduate Chinese elices．ChineseAcademyofSciences．Be沉ng100085，China：2Universityof Service Industrial 100039．China；’Water Academyo厂Sciences，Be谢ng Co．。Ltd，TianjinAirport 300308，China ．ChineseJournalofEcology，2009，28 1 ：23—26． Pnrk，Tianjin controltherainfall—inducedrunoff intheurban areasofWu． Abstract：To pollution sightseeing lawn was intheDeerYardofWuhanZoo．Inthis rolesof han．a systemconstructed paper。the thelawn in rainfall．inducedrunoff andin rainfall systemcontrolling nitrogenpollution reserving werestudied．Theresultsshowedthattheconcentrationsoftotal nitrogen dissolved ammonium rainfall．inducedrun- nitrogen DN ，andnitrogen NH4+一N inpretreated ni一 offdecreased retentionratesofinfluent by16．0％。13．9％．and75．6％。respectively．The were 90％of and nitrate thelawn NH4+N， 65％ofINDN，and 5％of Ⅱogenby system affectedtheeffluentTN anditsremov． rate concentration nitrogen N01一．N ．Hydraulicloading alrate theinfluentTNconcentrationWag thesamewhile significantly．When nearly hydraulic from removtl]rateofTNdecreasedfrom28．0％ rateincreased3．3to8．3 loading cm·d～，the of to19．8％．LawnwidthalsoaffectedtheconcentrationseffluentN thein． pollutants．With creaseoflawn ellauent concentration concentration width。the NH-+．N decreased，whileN01一．N of increased．TheDNconcentrationWasthelowestat10moflawnwidth．Atthemeantime purif- rainfall．induced increasedthenutrientsre．Ugeandrainwater runoff。lawn ying system recycling