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1、華中科技大學(xué)碩士學(xué)位論文AbstractWateristhesourceoflifeandthefoundationofcivilization,soit’sanimportantbirthplaceofhumancivilizationintheriverareaoftheworld.Rainfallintimeandspacecomplexityofthevariabilityhasanimportantinfluenceonrunoffbasin,rainfallpatternsintimeandspaceisveryimportantforunderstandingtempora
2、landspatialvariationofsoilmoisture,groundwaterrechargeandriverflow.Therefore,acorrectunderstandingoftheregionalspatialandtemporaldistributionofrainfallisthebasisofouranalysisoftherelevantregionaldroughtconditionsandwaterresourcesmanagement,butalsoanimportantreferenceforhydrologicalforecasting,sch
3、edulingconstructionandwaterconservancy.Inthispaper,thehistoricalrainfalldataatrainfallobservationstationistheexperimentaldata.Analyzingthespatialandtemporaldistributionpatternsofrainfallsequenceandthecombinedwiththestandardizedprecipitationindex(SPI)toassessregionaldroughtconditions.Intermsoftime
4、,thispaperusingtwoparameterGammadistributionandLognormaldistributionfitthehexicorridorinGansuprovinceriverstreamofshuleriverandheiheriverbasinfrom1966to2001totalof36monthsrainfalldistribution,andtheintroductionofamixingcoefficientrepresentstheprobabilityofnorainfall.TheresultofKolmogorov-Smirnovt
5、estshowedthatGammadistributionandLognormaldistributioncanbeagoodcharacterizationoftheHeiheRiverandShuleRivermonthlyrainfall.Byfittingtheresultsofthetwodistributionswerecompared,illustratedtheuseofgammadistributionandlognormaldistributiontorepresentrainfalldistributionofShuleandtheHeiheRiverBasini
6、sapplicable.Intermsofspace,usingthespatialinterpolationtoreflectthechangeofrainfallinspace,andcomparedtheaccuracyofinversedistanceweightingmethodandKriginginterpolationintheregionrainfallsequence.TheresultsshowedthatKriginginterpolationmethodhashigheraccuracy.II萬方數(shù)據(jù)華中科技大學(xué)碩士學(xué)位論文BecauseofShuleRiver
7、andHeiheRiverBasininGansuProvincewithinthelargerateofprecipitationchangeandtheunevendistributionofrainfallduringtheyear,theBasinoftenoccurfloods,droughtdisaster.Climatearidregionwillinevitablyleadtochangesinmoisturered