Technical Issues for Flood Risk Mapping
Xiang Liyun
（China Institute of Water Resources and Hydropower Research，Beijing；2.Research Center on Flood&Drought Reduction，Ministry of Water Resources，Beijing）
摘要： Floodrisk mapsareanessentialtoolandfoundationsforfloodrisk managementandoneofthe most criticalcomponentsinfloodcontrolanddroughtmitigation.Inordertomeettherequirementsofnationalfloodriskman-agementandtoprovidehighqualityoffloodmapping,thetechnicalissuesoffloodriskmappingarediscussed,including selectedfloodmagnitudeandanalysismethods,therequirementsforbasicdata,theprincipleoffloodcombination,defi-nitionoffloodboundaryconditions,parameterscalibrationandvalidationformodeling,optionvariouscalculation meth-odsforsmallandmediumriversbasins,distinguishingbetweensingleandmultipleleveebreaches;aswellasindicators forfloodregionalization.Eachcomponentoftherisk mappingshouldbeconsistent,andthereturnperiodsshouldnotbe lessthan100 year.Furthermore,thetechnicaldetailstoachievethosecriterionsareproposed.Thisstudyprovides technicalsupporttoongoingfloodrisk mappingandhasreferencevaluefordevelopingfloodrisk managementstrategies.
Abstract： Floodrisk mapsareanessentialtoolandfoundationsforfloodrisk managementandoneofthe most criticalcomponentsinfloodcontrolanddroughtmitigation.Inordertomeettherequirementsofnationalfloodriskman-agementandtoprovidehighqualityoffloodmapping,thetechnicalissuesoffloodriskmappingarediscussed,including selectedfloodmagnitudeandanalysismethods,therequirementsforbasicdata,theprincipleoffloodcombination,defi-nitionoffloodboundaryconditions,parameterscalibrationandvalidationformodeling,optionvariouscalculation meth-odsforsmallandmediumriversbasins,distinguishingbetweensingleandmultipleleveebreaches;aswellasindicators forfloodregionalization.Eachcomponentoftherisk mappingshouldbeconsistent,andthereturnperiodsshouldnotbe lessthan100 year.Furthermore,thetechnicaldetailstoachievethosecriterionsareproposed.Thisstudyprovides technicalsupporttoongoingfloodrisk mappingandhasreferencevaluefordevelopingfloodrisk managementstrategies.
关键词：Floodriskmapping Flood analysis Flood regionalization
Keywords：Floodriskmapping Flood analysis Flood regionalization