基于节点水龄的供水管网水质研究

李寻1,2,张土乔1,翁风永2,徐江和2(1.浙江大学建筑工程学院,浙江杭州310027;2.东华理工大学土木学院,江西抚州344000):在分析供水管网动态水质模型的基础上,利用EPANET软件对某城镇供水管网的管段流速节点水龄和余氯浓度进行模拟结果表明,在同样的水力条件下,供水管网中节点水龄与余氯浓度的变化趋势互补,当管道的水流速度增大时,管网中对应节点的水龄变小余氯浓度增大;根据生活饮用水卫生标准(GB54792006)规定的余氯浓度,可以得到供水管网的允许节点水龄和允许节点最大水龄,为管网的安全供水提供了科学依据:供水管网;节点水龄;水质;模拟:TU991:C:1000-4602(2009)19-0103-03StudyonWaterQualityinWaterDistributionSystemBasedonWaterAgeofNodesLIXun1,2,ZHANGTuqiao1,WENGFengyong2,XUJianghe2(1.CollegeofCivilEngineeringandArchitecture,ZhejiangUniversity,Hangzhou310027,China;2.CollegeofCivilandEnvironmentEngineering,EastChinaInstituteofTechnology,Fuzhou344000,China)Abstract:Basedonanalysisofthedynamicmodelforwaterqualityinwaterdistributionsystem,thepipevelocity,nodewaterageandresidualchlorineconcentrationinamunicipalwaterdistributionsystemweresimulatedbyEPANETsoftware.Thesimulatedresultsshowthatthewaterageisinverselycorrelatedwithresidualchlorineconcentrationunderthesamehydrauliccondition.Whenthepipevelocityisincreased,thenodewaterageisdecreasedandtheresidualchlorineconcentrationisincreased.Furthermore,accordingtotheresidualchlorinestipulatedinStandardsforDrinkingWaterQuality(GB5479-2006),thepermissiblenodewaterageandthemaximumnodewateragecanbeattained,whichprovidesascientificbasisforsafewatersupply.Keywords:waterdistributionsystem;nodewaterage;waterquality;simulation,[12],,(AOC)[3],1供水管网动态水质模型,,[4]EPANET,,r=-kC,k,C,r103第25卷第19期2009年10月中国给水排水CHINAWATER&WASTEWATERVo.l25No.19Oct.2009;k=1n=0,r=1.0[4],,()(),,,,[4]:(VSCS)t=iISQiCi|x=Li-jOSQjCS+r(CS)(1)VStCStQiLiiCi|x=Litx=LiQjjISOSr,,,k(2)Ci|x=0=jIkQjCj|x=Lj+Qk,extCk,extjIkQj+Qk,ext(2)ikCi|x=0iCj|x=LjjCk,extkIkkQk,extk2某城市管网实例分析1,,1,,,,,1Fig.1Schematicdiagramofwaterdistributionsystem,,,,21723,24h(26~50h),23,,21723Fig.2Variationofwaterageofnodes1,7and23withtime2,,,,,,,,104第25卷第19期中国给水排水(GB54792006):,30min,0.3mg/L,0.05mg/L0.3mg/L,Tp12.5h,Tp,,,0.05mg/L,Tmax,Tmax,,,,,,,,Tmax,3结论,,,,,:[1],,.[J].,2002,28(5):36-38.[2],.[M].:,2002.[3],.[J].,2005,24(1):49-53.[4]RossmanLA.EPANET2UsersManual[M].Cincinnat:iUSEPA,2000.:13979488163E-mail:[e-mail]:2009-03-25(上接第102页)NetSimu410,,DN100;DN100DN500,,,1m(10kPa),;DN500DN800,,2m(20kPa),4,DN100DN300DN500DN8003.823.23.813.81L/s,5%,3结论DN100,,,,,DN500,,DN800,,:[1],.[M].:,2002.[2],.[M].:,2007.[3],,,.[J].,2007,33(1):94-97.:13827773282E-mail:[e-mail]:2009-04-12105李寻,等:基于节点水龄的供水管网水质研究第25卷第19期