简介：Thispaperproposesamethodonanalyzingtheasynchronism-synchronismofprecipitationofdifferenthydrologicalregionsregardingtheS-to-NwatertransferareasofeasternChina.Thegeneralprocessoftheanalysisincludesthreesteps.Firstly,wecreatedtherainfallseriesoftheregionconcernedbycalculatingtheregionalaveragerainfallofthestationsintheareawiththehelpoftheclassicalThiessenPolygonmethod.Secondly,thestandardsofassessmentindicesforwetnessordrynessaresetaccordingtoGammadistributionfunctionwithacertainprobabilityP37.5%or62.5%givenrespectively.Finally,thefrequencyofninecombinationsarecountedasthequantitativefeatureofasynchronismandsynchronisminthreetimescales,thatistheyearly,seasonalandmonthlyscales.Theasynchronism-synchronismoftworegionpairshasbeenestimated.Theresultsshowthatthefrequencyofprecipitationasynchronismin1957-1998islargerthanthesynchronismfrequencyforboththeNorthChina-middleandlowerYangtzeRiverpairandfortheNorthChina-upperHanjiangRiverpair.Asforthesynchronismphenomena,thefrequencyofNd-Sdisratherlow.AsthecombinationsthataresuitableforwatertransfersareNd-Sw,Nn-Sw,Nd-SnandNn-Sn,thetotalfrequencyofthesecombinationsforNorthChina-middleandlowerYangtzeRiveris40%onanannualbasis,butonly28%inspringwhenwatershortagesaremostlikelytooccur.ThetotalfrequencyofthesecombinationsforNorthChina-upperHanjiangRiverisabout24%onanannualbasis,but35%inspringandwinter.Itshouldbenotedthatiffutureprecipitationpatternsaresimilartothatoftheperiod1957-1998,itisveryimportanttochangethenaturalcharacterofasynchronism-synchronismbyenhancingthecapabilityofhydro-projectsregulationandimprovingmanagementofthewatertransferproject.