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1、HydrologicalSciencesJournalISSN:0262-6667(Print)2150-3435(Online)Journalhomepage:http://www.tandfonline.com/loi/thsj20ModellingspatialvariabilityofsaturatedhydraulicconductivityusingFourierseriesanalysisAJAYKUMAR,R.S.KANWAR&G.R.HALLBERGTocitethisarticle:AJAYK

2、UMAR,R.S.KANWAR&G.R.HALLBERG(1994)ModellingspatialvariabilityofsaturatedhydraulicconductivityusingFourierseriesanalysis,HydrologicalSciencesJournal,39:2,143-156,DOI:10.1080/02626669409492730Tolinktothisarticle:https://doi.org/10.1080/02626669409492730Publishe

3、donline:29Dec2009.SubmityourarticletothisjournalArticleviews:172Citingarticles:2ViewcitingarticlesFullTerms&Conditionsofaccessandusecanbefoundathttp://www.tandfonline.com/action/journalInformation?journalCode=thsj20Hydrologica?Sciences-Journal-desSciencesBydr

4、ologiques,39,2tApril1994143ModellingspatialvariabilityofsaturatedhydraulicconductivityusingFourierseriesanalysis*AJAYKUMAR&R.S.KANWARDepartmentofAgriculturalandBiosystemsEngineering,IowaStateUniversity,Ames,Iowa,USAG.R.HALLBERGUniversityofIowaHygienicLaborato

5、ry,IowaCity,Iowa,USAAbstractAstudywasconductedtodevelopacomputermodeltosimulatethespatialvariabilityoffield-measuredsaturatedhydraulicconductivity(Ks)usingFourierseriesanalysis.Ksmeasurements,bothinsituandinthelaboratory,weremadeat150and300mmdepthsatregularin

6、tervalsof4.6montwoperpendiculartransectscrossingeachotheratthecentreofano-tillfield.ThreeFourierseriesmodels,withafinitenumberofharmonics,weredevelopedtosimulatethevariabilityinKsvalues.ThesemodelsincludedtheregularFourierseriesmodel,thehalf-rangeFourierserie

7、smodelwithonlycosineterms,andthehalf-rangeFourierseriesmodelwithonlysineterms.Also,atestofsignificancewasconductedwiththefirstfiveandeighttermsoftheFourierseriesmodels.Thistestindicatedthatwithonlyfiveoreighttermsmodelperformanceswerenotsignificantlydifferent

8、fromeachotheratthe0.05level.TheoverallresultsofthisstudyindicatedthatspatialvariabilityintheKsmeasurementsmadewithbothtechniques,fieldandlaboratory,canberepresentedsuccessfullywithhalf-ra