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ID:33005745
大小:1.62 MB
页数:76页
时间:2019-02-19
《绿色建筑小区砾石湿地径流控制系统试验分析-(6101)》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、重庆大学硕士学位论文雨重现期对其的影响较大,表现为:暴雨重现期越大,径流峰值越大,洪峰削减率越小;试验装置对径流总体积的削减率为26.78%~100%,这与降雨类型、降雨强度、前期晴天数等因素有关,降雨强度越小、前期晴天数越长,相应的滞留水量越多;对不同服务面积比下装置的水量控制分析表明:试验装置可以完全消纳重现期为0.25a、服务面积比为1:5情况下的径流雨水;可以完全消纳重现期为0.5a,服务面积比为1:2情况下的径流雨水;并且可以完全消纳重现期为3a,服务面积比为1:1情况下的径流雨水。试验装置的最大径流滞纳能力只与暴雨重现期有关,在服务面积比一定的情况下,暴雨重现期越
2、大,径流体积削减率越小。在服务面积比为1:2,满足绿色建筑小区绿化总要求的情况下,在重现期为0.25a、0.33a、0.5a的降雨产生时,装置将径流雨水完全消纳,无径流洪峰,在重现期为1a~100a时,装置的洪峰延缓时间为4.51~10.51min,洪峰削减率为11.1%~38.5%,可有效减轻市政雨水管网压力。以上试验结果表明,砾石湿地装置的水质净化、错峰、削峰效果显著。为实现试验装置的推广运用,具体提出了设计评价及维护方法,这将为装置在示范工程的应用提供指导。关键词:绿色建筑小区,低影响开发,雨水,径流,砾石湿地II英文摘要ABSTRACTInthebackgroundo
3、furbanization,watersystemandnaturalwaterprocessofmanycitiesandareasaroundtheworldareaffectedbydifferentfactorsnowadays.Ittriggeredaseriesofproblems,suchastheimpervioussurfaceincreased,therunoffcofficientincreased,andthehaverstingtimedecreased,sotheproblemsofthestormwaterfloodandwaterpolluti
4、onbecamemoreandmoreprominent.Howtocontrolthenegativeeffectsresultingfromstormwatermanagementfailuresbecameahotpointwhichhasattractedattentionofmanycountries.Infact,aneffectiveapproachofstormwatermanagementisnotonlybeneficialtoenvironment,butalsogoodforeconomyandaesthetics.LowImpactDevelopme
5、nt(LID)isasustainablelandscapewaytosimulatenaturalhydrologicalstatusandmaintainnaturalwatercourse,currentlyLIDtechnologyresearchandapplicationdevelopmenthasbecomethefocusinChina.BasedontheconceptofLIDinSpongeCity,combinedwiththegreenbuildingcommunityecologicalplanningandconstructionneeds,at
6、hree-bedsrainwatergravelwetlandwasdesigned,apilottesthasbeencarriedoutinthedemonstrationbase.Thefirstflusheffectofrunoffwasstudied,thecorrelationbetweenthevariouspollutantsandtheperformanceofthedevicetocontrolrainwaterrunoffwaterqualityandquantitywasdiscussedaswell,arelativelycompleteevalua
7、tionmethodofthegravelwetlandwasgivenout.Theexperimentanalysisofrunoffqualitiesshowedthat,inrunoff,theEMC(EventMeanConcentration)ofsuspendedsolid(SS)was26.38~432.33mg/L,theEMCofchemicaloxygendemand(COD)was15.21~187.35mg/L,theEMCoftotalphosphorus(TP)was0.0
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