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(NOT),the“noflooding”threshold(NWT)andthe“nodamage”threshold(NDT).Basedontheinvestigation
ofthe“July20”heavyrainstorm disasterinZhengzhou,thequantifyingindexanddeterminationmethodsofthe
threethresholdswerepreliminarilydiscussed.ThecorrespondingthresholdsofBeijing ,Tokyo,Shenzhenandother
citieswereanalyzedandquantifiedbycomprehensiveliteratureresearchandfloodeventsdeduction.Theprevention
andcontrolstrategieswerediscussedunderthemagnitudeofrainstormthatexceedsNOT ,NWT,NDTstandards,
andthecollaborativeapproachesofurbandrainageandfloodpreventionthresholdsisproposed.Theresultscan
providedecision - makingsupportforpreventionandcontrolofflooddisastersunderextremerainstorminurbanareas.
Keywords:urbanflood;drainageandfloodcontrolinfrastructure;Zhengzhou“July20”rainstorm;threshold
analysis ;preventionandcontrolstrategy
(责任编辑:李 娜)
(上接第 788页)
Floodriskmanagementtransmissionfrom spatialmasterplanningtoregulatoryplanning:
PracticeandexplorationinGuangzhou
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1,2
1,2
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KUANGMinyi ,DENGXingdong ,ZHULiming ,YANGYukui
(1.GuangzhouUrbanPlanning&DesignSurveyResearchInstitute,Guangzhou 510060,China;
2.GuangdongEnterpriseKeyLaboratoryforUrbanSensing,MonitoringandEarlyWarning,Guangzhou 510060,China)
Abstract:Aftertheinvestigationandanalysisofhistoricalrainstormfloodingsituation,theriskevaluationsystem
forfloodmanagementinGuangzhouCityhasbeenbuilt.Guangzhouhasinnovativelydelimitedhigh - riskregions
bywatershedunits ,usingRemoteSensing(RS)dataandGISdata,whichbecomethebasisoffloodriskman
agement.Supportthemasterplanningtodeterminethesafetybaselineforurbanandruralrainstormflooding.In
termsofinstitutionalinnovation , a planning transmission mechanism hasbeen established, a flood risk
assessmentsystemhasbeenimplemented ,andvertical,storagevolumeandrivermanagementandothercontrol
indicatorshavebeenincorporatedintotheplanninglandconditions ,asthemanagementbasisfortheentirelife
cycleoftheproject’sconstruction,toensurethetransformationofthegoalofaresilientcity.Guangzhouprovides
experienceformetropolistoreducefloodriskintheconstructionstage.
Keywords:rainstormflood - proneriskareas;sourcecontrol;planningtransmission;evaluationsystemofflood
risk;resilientcity
(责任编辑:于福亮)
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