绿色建筑小区砾石湿地径流控制系统试验分析-(6101)

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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