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1、苏州科技学院硕士学位论文ABSTRACTABSTRACTWiththerapideconomicandsocialdevelopment,theurbanizationprocessofcontinuousexpansion,surfacecharacteristicsofpadunderthecitychangealot.Duetotheincreaseofimperviousarea,resultinginincreasedsurfacerunoff,peakflowincreased,therunoffcoefficientincreasedandtheconvergenceRainwa
2、tershortened.Itgivesthecitytakenburdenforpreventwater-loggingandeasilyleadtourbanwater-logging.Inordertoalleviaterainstormwaterloggingdisasters,Wemustthoroughlystudydifferentunderlyingsurface(sunkenlawn,porouspavement)theinfluenceonrainwaterandconvergence.Therefore,inthepresentwork,theresidentialdis
3、trictinSuzhouCitywastakenasanexample,learnfromtheconceptoflowimpactdevelopment(LID),thecomprehensiveinvestigationonthemutualinteractionamongtopographicandhydrologicpropertieswascarriedoutbymeansofin-sitesurvey.Afterthen,acomparativeinvestigationonthetechniques’functionswasconductedinlaboratory-scale
4、.SWMMmodelwasadoptedtosimulatethestorm-waterofstudyarea.First,baesdontheestablishmentofurbanstorm-watersurfacerunoffmodel,thispaperputforwardthebasicdataprocessing,thesubcatchmentdividingandthesettingofmodelparameter.TheChicagoHydrographModel(CHM)hasbeenusedtosynthesizedifferentdesignreturnperiod(0.
5、5a,1a,5a,10a)、therainfalllastedfor120minsandtherainpeakmomentr=0.4hydrograph.Second,BasedonthehydrologicaleffectsofurbanizationaftertheSWMMsimulation,calculationandanalysisthesurfacerunoffandconfluence,runoffcoefficient,theamountoftotalflowcapacityandinfiltration.Resultsshowthatwiththeincreaseofdesi
6、gnreturnperiod,thetotalrunoff,averagerunoffcoefficientandthetotalflowcapacityasalsoincrease,buttheinfiltrationvolumebasicallynochange.Atlast,thispaperhasaresearchtheadditionofsunkenlawn,porouspavementandtwomeasuresofcombinationofcityrainwater.Resultsshowthatinthesamedesignstorm-waterreturnperiod,com
7、paredwiththepresentmodelsceneandwhensunkenlawnwasadopted,itcanreducethetotalamountofrunoff,averagerunoffcoefficientandtotalflowcapacity,alsocanincreasetheinfiltrationvolume.Thetotalrunoffdecreasedby30
