资源描述：
《太湖上游典型城镇地表径流面源污染特征》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、农业环境科学学报2006,25(6):1598-1602JournalofAgro-EnvironmentScience太湖上游典型城镇地表径流面源污染特征李恒鹏，黄文钰，杨桂山，李兆富（中国科学院南京地理与湖泊研究所，江苏南京210008）摘要：选择太湖上游典型城镇，在不同临前降雨条件下，对城镇地表径流系统地进行空间采样，分析采样样本的统计分布特征。结果显示，受城镇复杂人类活动的影响，城镇地表径流面源污染输出具有较大的空间差异，针对典型城镇整体的空间采样样本符合对数正态分布，基于样本频率分布特征，统计城镇地表径流的面源污染浓度，其中COD为7.729(7.2
2、99,8.184)mg·L-1，TN和TP分别为1.790(1.752,1.829)mg·L-1和0.117(0.107,0.129)mg·L-1。对不同临前降雨条件下、不同用地类型的样本分别进行统计，获得不同临前降雨条件、不同城镇用地类型的地表径流面源污染浓度统计特征，证实了临前降雨条件、城镇用地类型对城镇地表径流面源污染输出有较大影响。关键词：太湖地区；城镇；面源污染；径流；土地利用中图分类号：X501文献标识码：A文章编号：1672-2043(2006)06-1598-05Non-pointSourcePollutantConcentrationinTy
3、picalTownsofTaihuUpriverRegionLIHeng-peng,HUANGWen-yu,YANGGui-shan,LIZhao-fu(NanjingInstituteofGeographyandLimnologyResearch,CAS,Nanjing210008,China)Abstract:Manyresearcheshaveprovednon-pointpollutiontobeoneofmainfactorscausingwaterpollution.Inrecentyears,therearemanystudiesaboutnon
4、-pointpollutionloadassessmentofagriculturelanduseinwatershedscale,butthenon-pointloadfromtownarerarelystudied.Inordertoassessnon-pointsourcepollutionfromtowninTaihubasin,asurfacerunoffmonitoringintypicaltownwascarriedoutindifferentantecedentrainfallconditions.Atotal74runoffsampleswe
5、recollectedandthreeconstituentconcentrations,includingCOD,totalNandtotalP,weremeasuredforallrunoffsamples.Theresultsshowedthatthepollutantconcentrationvariedlargelyduetodifferentsamplinglocations,landuseandantecedentrainfallconditions.Thestatisticaltestsforspatialdifferencesprovedth
6、attheconstituentconcentrationofrunoffsamplesaccordedwithlogarithmnormaldistribution.Geometricalmean,lessaffectedbyextremeobservationsthanarithmeticalmean,wasconsideredamoreappropriateindexforassessingrepresentativeconcentrationoftownrunoff.TheaveragedconcentrationsofCOD,totalNandtot
7、alPinrunoffforwholetownwere7.729mg·L-1(7.299~8.184mg·L-1),1.790mg·L-1(1.752~1.829mg·L-1)and0.117mg·L-1(0.107~0.129mg·L-1),respectively.Indifferentfive-dayantecedentrainfallconditions,thevariationratesofconcentrationofCOD,TNandTPwereabout1.453,1.820and2.111timesrespectively.Pollutant
8、concentrationsofsur
